LACTATE

Episode 57 Barefoot or Minimalist: A Secret for Speed or a Shortcut to Injury? 🏃‍♂️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The era of carbon-plated super shoes has created a new pathology: intrinsic foot muscle atrophy, or "lazy foot" syndrome. This episode reveals how minimalist running has re-emerged as a clinical antidote. We break down the zero-sum biomechanical trade-off: going barefoot forces a forefoot strike that eliminates the violent "impact transient" on your knees, but massively overloads the Achilles tendon and calf muscles. You'll learn why a sudden transition is catastrophic, leading to bone marrow edema and stress fractures, as your atrophied "foot core" is unprepared for the load. Forget the all-or-nothing approach; this is your blueprint for using minimalism as a precise tool. We provide the gold-standard "Short Foot Exercise" to rebuild your foundation and a strict, 12-to-20-week clinical transition protocol to safely strengthen your feet, improve proprioception, and make you a more resilient runner.Keywords: barefoot running, minimalist shoes, running economy, foot core, injury prevention, carbon plate shoes, biomechanics, gait retraining, wolff's law🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Lieberman, D. E., Venkadesan, M., Werbel, W. A., Daoud, A. I., D'Andrea, S., Davis, I. S., Mang'eni, R. O., & Pitsiladis, Y. (2010). Foot strike patterns and collision forces in habitually barefoot versus shod runners. *Nature*, 463(7280), 531–535. https://pubmed.ncbi.nlm.nih.gov/20111000/McKeon, P. O., Hertel, J., Bramble, D., & Davis, I. (2015). The foot core system: a new paradigm for understanding intrinsic foot muscle function. *British journal of sports medicine*, 49(5), 290. https://pubmed.ncbi.nlm.nih.gov/24659509/Ridge, S. T., Johnson, A. W., Mitchell, U. H., Hunter, I., Robinson, E., Rich, B. S., & Brown, S. D. (2013). Foot bone marrow edema after a 10-wk transition to minimalist running shoes. *Medicine and science in sports and exercise*, 45(7), 1363–1368. (Sourced via BYU News, https://news.byu.edu/news/whoa-there-quick-switch-barefoot-shoes-can-be-bad-bone)Altman, A. R., & Davis, I. S. (2016). The Risks and Benefits of Running Barefoot or in Minimalist Shoes: A Systematic Review. *Sports health*, 8(2), 149–155. https://pmc.ncbi.nlm.nih.gov/articles/PMC4212355/Esculier, J. F., Dubois, B., Dionne, C. E., Leblond, J., & Roy, J. S. (2015). A consensus definition and rating scale for minimalist shoes. *Journal of foot and ankle research*, 8, 42. https://pmc.ncbi.nlm.nih.gov/articles/PMC4543477/SDX Training. (n.d.). *Using Carbon Shoes the Right Way*. Retrieved March 30, 2026, from https://www.sdxtraining.com/Articles/using-carbon-shoes-the-right-wayVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 56 : Open Water Anxiety Why You Panic & How to Swim Straight 🌊💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Open water panic is not a failure of your mental fortitude but a profound neurophysiological reflex triggered by a hostile environment. When you dive into cold water, the sudden skin cooling initiates the sympathetically driven Cold Shock Response, causing involuntary hyperventilation and a massive spike in heart rate ; if you simultaneously submerge your face while holding your breath, the parasympathetic Mammalian Diving Reflex activates, commanding your heart to rapidly slow down. This simultaneous "accelerator" and "brake" signaling creates a highly arrhythmogenic Autonomic Conflict, which can lead to severe cardiac instability and sudden incapacitation even in elite athletes. To survive and perform, you must prime your trigeminal nerve by acclimating your face and body for two to three minutes before the race starts, allowing the initial hyperventilation to subside ; mechanically, you must separate sighting from breathing by using the "alligator eyes" technique—lifting only your goggles above the surface to minimize form drag—while relying on bilateral breathing to correct inherent vestibular drift and prevent lateral crossover. Without continuous visual recalibration, accumulating sensorimotor noise guarantees you will naturally swim in circles, a sensory deprivation effect so severe it mimics the isolation of solitary confinement. The ultimate manifestation of this aquatic deprivation was famously experienced by Diana Nyad during her 53-hour Cuba-to-Florida crossing, where she vividly hallucinated the Taj Mahal and scenes from The Wizard of Oz in the dark waters below.Keywords: open water, panic, cold shock response, autonomic conflict, sighting, vestibular drift, mammalian diving reflex🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Shattock, M. J., & Tipton, M. J. (2012). 'Autonomic conflict': a different way to die during cold water immersion? The Journal of Physiology, 590(14), 3219-3230. https://pmc.ncbi.nlm.nih.gov/articles/PMC3459038/Jacobs, L. F., et al. (2015). Olfactory Orientation and Navigation in Humans. PLOS ONE, 10(6), e0129387. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0129387Bierens, J. J., et al. (2016). Physiology of drowning: a review. Physiology, 31(2), 147-166. https://journals.physiology.org/doi/pdf/10.1152/physiol.00002.2015Tipton, M. J., et al. (2017). Cold water immersion: kill or cure? Experimental Physiology, 102(11), 1335-1355. https://www.posturite.co.uk/media/pdf-downloads/Prof-Mike-Tipton.pdfTipton, M. J. (1989). The initial responses to cold-water immersion in man. Clinical Science, 77(6), 581-588.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 55 : The Female Athlete Code Mastering Your Cycle & Avoiding the RED-S Trap 🧬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: For over a century, endurance sports operated on the flawed assumption that women were simply small men, leading to catastrophic misapplications of training loads and fueling strategies. The female bioenergetic environment is continuously modulated by 17β-estradiol and progesterone, where systemic estrogen enhances long-chain fatty acid uptake and suppresses hepatic gluconeogenesis during the late follicular and mid-luteal phases ; however, while these molecular shifts in substrate utilization are verified, network meta-analyses prove their translation to actual measurable physical performance across cycle phases is statistically trivial. Rather than paralyzing your programming with rigid cycle-syncing algorithms, which frequently mistime hormonal phases due to massive biological variance, you must track subjective wellness metrics like perceived exertion and prioritize real-time auto-regulation over shifting VO₂ workloads based on assumptions ; elite programming must avoid Low Carbohydrate Availability by matching intake directly to glycolytic session demands to prevent the neuroendocrine collapse of Relative Energy Deficiency in Sport (REDs). An energy deficit independently triggers a severe hypothalamic triage protocol, suppressing T3, halting luteinizing hormone pulsatility, and causing catastrophic skeletal demineralization, a state dangerously masked by the synthetic hormones of oral contraceptive pills. The visceral reality of this physiological starvation was exposed when distance running prodigy Mary Cain suffered three years of amenorrhea and five broken bones under a toxic, weight-obsessed coaching paradigm.Keywords: female athlete, menstrual cycle, relative energy deficiency in sport, low carbohydrate availability, bioenergetics, endocrinology, amenorrhea🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Mountjoy, M., Ackerman, K. E., Bailey, D. M., et al. (2023). 2023 International Olympic Committee's (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs). British Journal of Sports Medicine, 57(17), 1073-1097. 10.1136/bjsports-2023-106994McNulty, K. L., Elliott-Sale, K. J., Dolan, E., et al. (2020). The Effects of Menstrual Cycle Phase on Exercise Performance in Eumenorrheic Women: A Systematic Review and Meta-Analysis. Sports Medicine, 50(10), 1813-1827. 10.1007/s40279-020-01319-3Colenso-Semple, L. M., D'Souza, A. C., Elliott-Sale, K. J., & Phillips, S. M. (2023). Current evidence shows no influence of women's menstrual cycle phase on acute strength performance or adaptations to resistance exercise training. Frontiers in Sports and Active Living, 5. 10.3389/fspor.2023.1054542Elliott-Sale, K., et al. (2023). The effects of oral contraceptives on exercise performance, substrate oxidation, and hypertrophy. Journal of Applied Physiology, 135(4). 10.1152/japplphysiol.00346.2023Schlie, Krassowski, and Schmidt. (2025). Methodological standards in menstrual cycle research. Journal of Applied Physiology. 10.1152/japplphysiol.00223.2025Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 54 : The "Big 5" The Only 5 Supplements That Actually Work 🔬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: You can either gamble on unregulated industry mythology or build your physiology on the undisputed baseline of performance enhancement. The modern athletic landscape is defined by the "Big 5"—caffeine, creatine, sodium bicarbonate, beta-alanine, and dietary nitrates—which operate on entirely distinct pathways to bypass human bioenergetic bottlenecks ; caffeine acts as an adenosine receptor antagonist to sustain central motor drive ; creatine saturates phosphocreatine stores for accelerated ATP regeneration and neuroprotection ; sodium bicarbonate induces metabolic alkalosis to accelerate acid efflux via MCT transporters ; beta-alanine elevates intracellular carnosine to buffer hydrogen ions ; and dietary nitrates rely on the oral microbiome to reduce the VO₂ cost of submaximal exercise via nitric oxide vasodilation. Elite application requires meticulous periodization, moving away from generalized dosing to specific protocols like utilizing 20 grams of creatine daily for rapid loading prior to base-building blocks , deploying low-dose caffeine at 1 to 3 milligrams per kilogram mid-race , leveraging hydrogel-encapsulated bicarbonate 60 to 180 minutes before 1-to-12-minute high-intensity glycolytic efforts , loading beta-alanine over 4 to 8 weeks for mid-range efforts , and combining acute nitrate shots with a 3-to-7-day loading phase to force maximum plasma nitrite accumulation. Application is heavily dictated by pharmacogenomics, where fast metabolizers thrive on caffeine while slow metabolizers face severe performance decrements , alongside sex-specific differences where nitrates may fail to improve sprint performance in females. The global sports nutrition industry was permanently altered when British sprinters Linford Christie and Sally Gunnell covertly utilized Dr. Roger Harris's unproven "Ergomax C150" creatine at the 1992 Barcelona Olympics.Keywords: caffeine, creatine, sodium bicarbonate, beta-alanine, dietary nitrates, bioenergetics, pharmacogenomics, vo₂🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :International Olympic Committee. (2018). IOC consensus statement: dietary supplements and the high-performance athlete. British Journal of Sports Medicine. https://bjsm.bmj.com/content/52/7/439Forbes, S. C., et al. (2024). The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis. Frontiers in Nutrition. https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2024.1424972/fullGrgic, J., et al. (2020). International Society of Sports Nutrition position stand: sodium bicarbonate and exercise performance. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC8427947/Saunders, B., et al. (2017). beta-alanine supplementation to improve exercise capacity and performance: A systematic review and meta-analysis. ResearchGate. https://www.researchgate.net/publication/310617184_b-alanine_supplementation_to_improve_exercise_capacity_and_performance_A_systematic_review_and_meta-analysisBailey, S. J., et al. (2009). Dietary Nitrate Supplementation and Exercise Performance. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC4008816/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 53 : Bike : Cadence Wars Spin Fast or Push Hard? The Science of Pedaling 🚴‍♂️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The century-long debate between grinding a heavy gear and spinning a light one is finally settled by modern biomechanics. Manipulating your pedaling rate dictates a complex trade-off between peripheral muscular stress and central cardiovascular demand ; lower cadences require massive torque that recruits highly fatigable fast-twitch (Type II) muscle fibers, burning precious glycogen and accumulating fatigue byproducts. Conversely, higher cadences lower the torque threshold, allowing your nervous system to rely on efficient, fat-burning slow-twitch (Type I) fibers, which preserves localized carbohydrate stores ; however, this shifts the burden centrally, exponentially increasing the work of breathing and heart rate. While elite riders with massive VO₂max engines can sustain 95-105 RPM to protect their legs , amateur cyclists should avoid over-spinning and locate their personal metabolic equilibrium. You can find your optimal bioenergetic intersection using a heart rate decoupling test: hold a moderate power output for 10 minutes each at 70, 80, and 90 RPM, selecting the cadence that yields the lowest stable heart rate without intense muscular burning ; avoid low-cadence grinding on flats to prevent patellofemoral joint damage, and stop actively pulling up on the pedals, focusing instead on a powerful downstroke. Your optimal cadence is a dynamic target that scales upward as you push higher watts ; furthermore, extreme high-cadence cycling can induce diaphragm failure, triggering a respiratory metaboreflex that steals blood flow from your legs. This physiological reality explains Lance Armstrong’s legendary 2001 Alpe d'Huez attack, where his hyper-kinetic 90-105 RPM spin weaponized his cardiovascular system to drop Jan Ullrich’s brutal 75-80 RPM mashing.Keywords: cycling cadence, biomechanics, glycogen sparing, torque, vo2max, fast-twitch fibers, cycling economy🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Ahlquist, L. E., Bassett, D. R., Shikcy, R., et al. (1992). The effect of pedaling frequency on glycogen depletion rates in type I and type II quadriceps muscle fibers during submaximal cycling exercise. European Journal of Applied Physiology and Occupational Physiology, 65(4), 360-364. https://doi.org/10.1007/BF00243516Dunst, A. K., Hesse, C., & Ueberschär, O. (2024). Changes in force-velocity and power-velocity relationships with increasing work rate up to maximal oxygen uptake and to assess the resulting alterations in optimal cadence. Frontiers in Physiology, 15, 1343601. https://doi.org/10.3389/fphys.2024.1343601Foss, Ø., & Hallén, J. (2004). The most economical cadence increases with increasing workload. European Journal of Applied Physiology, 92(4-5), 443-451. https://doi.org/10.1007/s00421-004-1175-5Mitchell, U. H., et al. (2019). The Impact of Cycling Cadence on Respiratory and Hemodynamic Responses to Exercise. Medicine & Science in Sports & Exercise, 51(8), 1627-1636. https://doi.org/10.1249/MSS.0000000000001960Nimmerichter, A., Eston, R., Bachl, N., & Williams, C. (2012). Effects of low and high cadence interval training on power output in flat and uphill cycling time-trials. European Journal of Applied Physiology, 112(1), 69-78. https://doi.org/10.1007/s00421-011-1957-5Takaishi, T., Yamamoto, T., Ono, T., Ito, T., & Moritani, T. (1998). Neuromuscular, metabolic, and kinetic adaptations for skilled pedaling performance in cyclists. Medicine and Science in Sports and Exercise, 30(3), 442-449. https://doi.org/10.1097/00005768-199803000-00016Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 52 Your First Triathlon Avoid the 5 Mistakes That Ruin 90% of Races 🏊‍♂️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: You might think a triathlon is three distinct sports, but science reveals it is a single physiological stressor punctuated by two catastrophic transitions that ruin novice races ; your open-water start triggers a violent autonomic clash between the parasympathetic dive reflex and sympathetic cold shock response, creating erratic cardiac activity and perceived panic , while T1 induces severe postural hypotension as blood rushes to your lower extremities and T2 forces a neuromuscular mismatch where your brain struggles to shift from concentric cycling to eccentric stretch-shortening running, artificially spiking your $VO_2$. To survive, you must execute a 10 to 15-minute cold water habituation before the gun , increase your kick rate in the final 100 meters to preemptively shunt blood , and strictly cap your bike power at 75-85% of FTP using a controlled cadence to preserve glycogen ; integrate 10 to 15-minute micro-bricks off the bike solely to force neural adaptation without accumulating overuse fatigue , while restricting race-day carbohydrate intake to a practiced 30-60g/h to prevent splanchnic ischemia. Defying all conventional physiological metrics, outliers like Sister Madonna Buder have executed these survival mechanics to complete Ironmans into their 90s.Keywords: triathlon, transition, autonomic clash, micro-bricks, glycogen, splanchnic hypoperfusion, vo₂, neuromuscular🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Millet, G. P., & Vleck, V. E. (2000). Physiological and biomechanical adaptations to the cycle to run transition in Olympic triathlon. British Journal of Sports Medicine, 34(6), 384-390. https://pmc.ncbi.nlm.nih.gov/articles/PMC1756235/Subhan, M. M., et al. (2019). Cold water face immersion in healthy subjects: how a clash of autonomic pathways might contribute to triathlon deaths. Proceedings of The Physiological Society, 44, C22. https://www.physoc.org/abstracts/cold-water-face-immersion-in-healthy-subject-s-how-a-clash-of-autonomic-pathways-might-contribute-to-triathlon-deaths/Vercruyssen, F., et al. (2002). Influence of cycling cadence on subsequent running performance in triathletes. Medicine and Science in Sports and Exercise, 34(3), 530-536. https://pubmed.ncbi.nlm.nih.gov/11880820/Peeling, P. D., et al. (2005). Factors influencing pacing in triathlon. Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC4172046/Shaw, G., et al. (2019). Injury and illness in short-course triathletes: A systematic review. https://pmc.ncbi.nlm.nih.gov/articles/PMC10980869/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 51 : The Aero vs. Comfort Battle Nailing Your Bike Position 🚴💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: To slice through the wind at 50 km/h, you must fold your body into a weapon; but this aerodynamic tuck comes at a brutal physiological cost. When your velocity exceeds 14 m/s, over 90% of resistance is aerodynamic ; lowering your torso reduces your drag coefficient but simultaneously attenuates peak power and VO₂max. Dropping into an extreme tuck closes your hip angle, stretching your bi-articular muscles beyond their optimal length-tension curve. Furthermore, compressing your abdomen against your diaphragm skyrockets the work of breathing, triggering a respiratory metaboreflex that steals oxygenated blood away from your legs via sympathetic vasoconstriction. To maintain your W/CdA ratio without crushing your hip flexors, elite application dictates shortening your crank arms from 175 mm to 160 mm and moving your saddle forward to rotate your center of mass around the bottom bracket. For sub-elite speeds around 32 km/h, prioritize the power preservation rule; holding a slightly higher torso angle prevents the neuromuscular fatigue and vibration trauma that destroy your endurance over a 5-hour race. Do not apply archaic static formulas like KOPS to dynamic aerodynamic setups. Female athletes and smaller riders face distinct biomechanical penalties under the new UCI regulations, as forced 400 mm handlebar widths artificially splay their arms, increasing frontal area and causing shoulder pain. Just as Dan Bigham engineered a World Hour Record by prioritizing a 0.164 CdA at altitude over raw wattage, the future of cycling relies on real-time on-bike telemetry to perfectly balance your drag and physiology.Keywords: aerodynamics, biomechanics, time-trial, vo₂max, metaboreflex, hip angle, drag coefficient🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Gnehm, P., Reichenbach, S., Altpeter, E., Widmer, H., & Hoppeler, H. (1997). Influence of different racing positions on metabolic cost in elite cyclists. Medicine and Science in Sports and Exercise, 29(6), 818-823. https://pubmed.ncbi.nlm.nih.gov/9219211/Fintelman, D. M., Sterling, M., Hemida, H., & Li, F. X. (2015). The effect of time trial cycling position on physiological and aerodynamic variables. Journal of Sports Sciences, 33(16), 1730-1737. https://pubmed.ncbi.nlm.nih.gov/25658151/Ricard, M., Hills-Meyer, P., Miller, M., & Michael, T. (2006). The effects of bicycle frame geometry on muscle activation and power during a Wingate anaerobic test. Journal of Sports Science & Medicine, 5(1), 25-32. https://pmc.ncbi.nlm.nih.gov/articles/PMC5786204/Dempsey, J. A., Romer, L., Rodman, J., Miller, J., & Smith, C. (2006). Consequences of exercise-induced respiratory muscle work. Respiratory Physiology & Neurobiology, 151(2-3), 242-250. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2018.01970/xmlBarnes, C., Hopker, J., Fennell, C., & Gibson, S. (2024). Validity and Reliability of an On-Bike Sensor System for the Determination of Aerodynamic Drag in Cycling. Journal of Science and Cycling. https://www.jsc-journal.com/index.php/JSC/article/download/901/804/4905Polanco, A. P., Suarez, D. R., & Muñoz, L. E. (2020). Selection of Posture for Time-Trial Cycling Events. Applied Sciences, 10(18), 6546. https://www.mdpi.com/2076-3417/10/18/6546Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 50 The Post-Marathon Blueprint What to Do (and NOT Do) After 42.2k 🏃‍♂️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Crossing the finish line is not just a test of endurance but the beginning of a massive physiological trauma; you are dealing with an acute, multi-systemic crisis. Your body faces transient myocardial micro-trauma where cardiac cell walls become highly porous, acute kidney injury marked by a dangerous 48-hour ischemic dip, and neurological cannibalization where your brain physically consumes its own myelin for energy. To survive this, you must adopt complete passive rest for the first 48 to 72 hours, maintaining rigorous hydration and consuming 1.0-1.2 g/kg/h of carbohydrates to support delayed renal recovery and halt catabolism. Crucially, you must strictly avoid NSAIDs like ibuprofen, which double your risk of kidney injury, and shun active recovery methods like elliptical machines that clinically delay organ repair. Understand that the "post-marathon blues" are a real biological consequence of your brain's myelin depletion and neurotransmitter shifts, not just a psychological letdown. This violent biological cost was evident as early as the 1904 St. Louis marathon, where winner Thomas Hicks survived extreme dehydration only through strychnine injections.Keywords:marathon, recovery, myelin, kidney injury, nsaids, necrosis, metabolomics🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bester, C., & Loots, D. T. (2023). The metabolic recovery of marathon runners: an untargeted 1H-NMR metabolomics perspective. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC10192615/Warhol, M. J., et al. (1985). Skeletal muscle injury and repair in marathon runners after competition. PubMed. https://pubmed.ncbi.nlm.nih.gov/3970143/Ramos-Cabrer, P., et al. (2025). Reversible reduction in brain myelin content upon marathon running. PubMed. https://pubmed.ncbi.nlm.nih.gov/40128612/Frontiers. (2022). Renal Function Recovery Strategies Following Marathon in Amateur Runners. Frontiers in Physiology. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.812237/fullMDPI. (2023). Acute Kidney Injury Biomarkers in Marathon Runners: Systematic Review and Meta-Analysis. Medicina. https://www.mdpi.com/1648-9144/61/10/1775Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 49: [PARIS MARATHON SPECIAL] The Ultimate D-2 Checklist 🔬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The 48 hours before a marathon shift your focus entirely from aerobic adaptation to biological preservation, dictating your race-day survival. To achieve glycogen supercompensation, you must ingest 10-12 g/kg of carbohydrates; however, consuming complex carbs creates a massive fibrous bulk in your gut. When the starting gun fires, running at a high percentage of VO₂max triggers splanchnic ischemia, shunting up to 80% of blood away from the digestive tract. This stationary, oxygen-starved fecal mass rapidly ferments, breaching epithelial tight junctions and causing severe gastrointestinal collapse. To prevent this, you must adopt a strict Low-Residue Diet (LRD)—under 10 g of fiber daily starting at T-48—to mechanically empty the colon while still absorbing highly refined carbohydrates for fuel. Tactically, you must also preserve your biomechanics by avoiding "Expo Legs"; collect your bib on Thursday or Friday to prevent the isometric soleus fatigue caused by hours of slow walking on concrete. Furthermore, because pre-race anxiety will inevitably ruin your sleep on race eve, you must "bank" sleep on the penultimate night (D-2) to immunize your cognitive and metabolic systems. Navigating modern bureaucratic hurdles like validating your digital Parcours Prévention Santé (PPS) is critical, a stark evolution from the chaotic 1900 Paris race where Michel Théato won amidst accusations of dodging carriages and taking shortcuts.Keywords:marathon, low-residue diet, glycogen supercompensation, splanchnic ischemia, sleep banking, paris marathon, expo legs🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Scrivin, R., Slater, G., Mika, A., & Costa, R. J. S. (2024). The impact of 48 h high carbohydrate diets with high and low FODMAP content on gastrointestinal status and symptoms in response to endurance exercise, and subsequent endurance performance. Applied Physiology, Nutrition, and Metabolism, 49(6), 773-791. https://www.researchgate.net/publication/387826933_Fibre_The_Forgotten_Carbohydrate_in_Sports_Nutrition_RecommendationsMartin, T., et al. (2024). Sleep patterns and sleep management strategies in ultramarathons, and the repercussions of sleep deprivation. Sports Medicine - Open, 10(1). https://pmc.ncbi.nlm.nih.gov/articles/PMC11001838/Burke, L. M., Jeukendrup, A. E., Jones, A. M., & Mooses, M. (2019). Contemporary nutrition strategies to optimize performance in distance runners and race walkers. International Journal of Sport Nutrition and Exercise Metabolism, 29(2). https://journals.humankinetics.com/view/journals/ijsnem/29/2/article-p117.pdfCosta, R. J. S., et al. (2017). Exercise-Associated Gastrointestinal Symptoms consensus statement. British Journal of Sports Medicine.Wu, K-L., et al. (2011). Impact of low-residue diet on bowel preparation for colonoscopy. Diseases of the Colon & Rectum, 54:107-112.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 48 : Is Your GPS Watch ACCURATE? The Surprising Truth ⌚💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: You treat the pacing data displayed on your wrist as an absolute, infallible reflection of reality, but it is actually a highly processed statistical probability. While multi-band receivers capture high-frequency radio signals to mitigate multipath interference in urban environments , raw spatial data theoretically overestimates distance due to random point scatter ; to compensate, your watch utilizes a Kalman filter that aggressively smooths curves, ultimately causing consumer devices to consistently underestimate total distance. Furthermore, your own body acts as an obstacle, with high tissue water content absorbing electromagnetic waves , while the pendulum motion of your arm swing introduces continuous Doppler shifts that severely destabilize instant pace calculations. For elite training, you must minimize reliance on real-time micro-pacing during high-intensity intervals, prioritizing manual lapping and utilizing telemetry strictly for post-hoc analysis rather than as a real-time throttle ; amateur athletes should focus entirely on lap pace to absorb spatial scatter and ensure a smoothed moving average that prevents erratic surging. Keep in mind that purely GPS-derived elevation is mathematically weaker and inherently inaccurate without a barometric altimeter , and understand that certified marathon courses are intentionally designed longer than standard to prevent short-course records. Despite the multi-billion-dollar satellite infrastructure, every legitimate marathon on Earth is still measured by an official riding a bicycle equipped with a 1971 mechanical analog device known as the Jones Counter.Keywords: telemetry, gps accuracy, kalman filter, pace, running, dual-band, multipath🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Ranacher, P., Brunauer, R., Trutschnig, W., Van der Spek, S., & Reich, S. (2016). Why GPS makes distances bigger than they are. International Journal of Geographical Information Science, 30(2), 316-333. https://doi.org/10.1080/13658816.2015.1086924Johansson, R. E., Adolph, S. T., Swart, J., & Lambert, M. I. (2020). Accuracy of GPS sport watches in measuring distance in an ultramarathon running race. International Journal of Sports Science & Coaching, 15(5-6). https://doi.org/10.1177/1747954119899880Waegli, P., & Skaloud, A. (2009). Optimization of two kinematic trajectory estimation methods. Journal of Applied Geodesy.Tavakoli, M., et al. (2020). Accuracy of sport watches in tracking distance and pace in urban and forest environments. JMIR mHealth and uHealth, 8(6), e17118. https://doi.org/10.2196/17118Zhu, Y., et al. (2021). The effects of human body interference on the performance of a GPS antenna. IEEE Transactions on Antennas and Propagation.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 47 : Rituals, Superstitions & OCD The Hidden Science of Champions' Routines 🧠💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The elite athletic environment demands absolute control amid chaos, driving performers to construct structural micro-worlds ; understanding this requires separating pre-performance routines (PPR) from superstitious rituals (SR) and obsessive-compulsive disorder (OCD). Under pressure, the amygdala detects threats and floods the brain with catecholamines, causing the prefrontal cortex to hijack the basal ganglia's automatic motor programs—a phenomenon known as the explicit monitoring hypothesis, or "choking". To protect automaticity, PPRs act as a neurological firewall by engaging conscious resources, notably utilizing the "Quiet Eye" (gaze fixation >100ms) to suppress the distraction-prone ventral attention network and activate the goal-directed dorsal attention network. Conversely, the brain's pattern-matching engine generates superstitions via reward prediction error, where midbrain dopamine spikes incorrectly link coincidental actions to successful outcomes. Training application requires a 5-step model—readying, imaging, focusing, executing, and evaluating—while adapting to skill level: novices require motor-emphasized physical grounding, whereas elites rely on cognitive regulation. At the extreme, athletes like Wade Boggs build rigid behavioral cocoons of extreme routine , while others, like NHL goalie Corey Hirsch, suffer from clinical OCD, performing rituals not to win, but to silence intrusive, screaming thoughts.Keywords: pre-performance routine, quiet eye, basal ganglia, dopamine, choking, superstition, ocd🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Rupprecht, A. G. O., Tran, U. S., & Gröpel, P. (2021). The effectiveness of pre-performance routines in sports: a meta-analysis. International Review of Sport and Exercise Psychology. https://ucrisportal.univie.ac.at/en/publications/the-effectiveness-of-pre-performa-nce-routines-in-sports-a-meta-an/Mesagno, C., & Mullane-Grant, T. (2010). A Comparison of Different Pre-Performance Routines as Possible Choking Interventions. Journal of Applied Sport Psychology.Vickers, J. N. (1996). Various publications on The Quiet Eye.Lidor, R., & Mayan, G. (2005). Can Beginning Learners Benefit from Preperformance Routines? The Sport Psychologist.Hirsch, C. (2017). Dark, Dark, Dark, Dark, Dark, Dark. The Player's Tribune.Viner, B. (2004). Goran Ivanisevic: Wimbledon champion with a Tinky Winky tale to tell. The Independent. https://www.independent.co.uk/news/people/profiles/goran-ivanisevic-wimbledo-n-champion-with-a-tinky-winky-tale-to-tell-34263.htmlVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 46: MARATHON PREP #4 The Mental Game - How to Conquer Pre-Race Anxiety 🧠💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Unmanaged pre-race anxiety creates a metabolic tax that burns fuel before the starting gun, affecting 78% of runners and causing a 10-15% performance decrement equivalent to being undertrained. This Competitive State Anxiety activates the Sympathetic Nervous System, spiking cortisol and adrenaline to accelerate glycogenolysis, potentially depleting 30-50% of your glycogen stores in the first hour. Instead of trying to calm down, you must reappraise cognitive worry as excitement, aligning your mental label with your high physiological arousal to optimize performance. Acknowledge taper-induced "phantom pains" as normal neurological withdrawal, and use periodic smiling to improve your running economy by 2.8% while mitigating stress-induced gut permeability. Remember Paula Radcliffe’s 2004 collapse, where extreme pressure caused the brain to shut down the body; elite athletes succeed by interpreting somatic arousal as a facilitative signal of readiness rather than a debilitative threat.Keywords: competitive state anxiety, sympathetic nervous system, glycogenolysis, reappraisal, running economy, phantom pains, gut permeability, central governor🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Martens, R., Vealey, R. S., & Burton, D. (1990). Competitive Anxiety in Sport. Human Kinetics.Hanin, Y. L. (1997). Emotions and Athletic Performance: Individual Zones of Optimal Functioning Model. European Yearbook of Sport Psychology. https://pubmed.ncbi.nlm.nih.gov/10585167/Brooks, A. W. (2014). Get excited: reappraising pre-performance anxiety as excitement. Journal of Experimental Psychology: General. https://pubmed.ncbi.nlm.nih.gov/24364682/Brick, N. E., McElhinney, M. J., & Metcalfe, R. S. (2018). The effects of facial expression and relaxation cues on movement economy, physiological, and perceptual responses during running. Psychology of Sport and Exercise. https://www.researchgate.net/publication/319935871_The_effects_of_facial_expression_and_relaxation_cues_on_movement_economy_physiological_and_perceptual_responses_during_runningThornton, O. (2025). The Compounding Mechanisms of Pre-Race Anxiety and Exercise on Gastroesophageal Reflux in Endurance Runners. https://cdr.lib.unc.edu/concern/articles/5999nj98xVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 45 Is "Double Day" Training For You? The Pros and Cons of Two-a-Days 🧬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The concept of two-a-days stands as the ultimate high-performance tool for the elite, yet it serves as the most reliable mechanism for burnout and injury in the amateur. At the cellular level, concurrent training triggers a molecular war between mTORC1, the anabolic driver of protein synthesis, and AMPK, the metabolic sensor activated by endurance work ; when activated, AMPK blocks mTOR via TSC2, effectively dampening the signal for muscle growth without inhibiting VO₂ max improvements. To navigate this interference effect, you must separate conflicting sessions by at least 6 to 24 hours to reset the molecular environment —and opt for concentric-dominant cycling over running to minimize eccentric muscle damage. Your practical blueprint demands strictly managing your acute:chronic workload ratio between 0.8 and 1.3 to avoid the danger zone , while executing the 4 R's of recovery: rehydrating 150% of fluid lost, refueling with high-glycemic carbs, repairing with 20-40g of protein, and resting. You also face the hormonal reality where chronic double sessions tank your testosterone-to-cortisol ratio unless you buffer the biological cost with sleep extension, aiming for 10 hours to boost performance ; you can look to Jerry Rice, who mastered this by running a steep hill in the morning and lifting in the afternoon, trading a fraction of peak power for infinite repeatability.Keywords: two-a-days, concurrent training, mtor, ampk, hypertrophy, endurance, workload🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Hickson, R. C. (1980). Interference of strength development by simultaneously training for strength and endurance. PubMed. [https://pubmed.ncbi.nlm.nih.gov/7193134/](https://pubmed.ncbi.nlm.nih.gov/7193134/)Brigatto, et al. (2022). Twice-daily sessions result in a greater muscle strength and a similar muscle hypertrophy compared to once-daily session in resistance-trained men. PubMed. [https://pubmed.ncbi.nlm.nih.gov/33634677/](https://pubmed.ncbi.nlm.nih.gov/33634677/)Rønnestad, B. (2010). Strength training improves 5-min all-out performance following 185 min of cycling. SciSpace. [https://scispace.com/pdf/strength-training-improves-5-min-all-out-performance-3lj2aekuat.pdf](https://scispace.com/pdf/strength-training-improves-5-min-all-out-performance-3lj2aekuat.pdf)Hansen, A. K. (2005). Skeletal muscle adaptation: training twice every second day vs. Journal of Applied Physiology. [https://journals.physiology.org/doi/10.1152/japplphysiol.00163.2004](https://journals.physiology.org/doi/10.1152/japplphysiol.00163.2004)Mah, C. (2011). The effects of sleep extension on the athletic performance of collegiate basketball players. PMC. [https://pmc.ncbi.nlm.nih.gov/articles/PMC3119836/](https://pmc.ncbi.nlm.nih.gov/articles/PMC3119836/)Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 44 : MARATHON PREP #3 The Taper - How to Train LESS to Perform BETTER 📉💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The taper is a paradoxical biological inflection point where you must run less to run faster, turning accumulated fatigue into explosive performance currency ; during this phase, muscle glycogen supercompensates from a depleted 130-150 mmol/kg to over 200 mmol/kg, effectively extending your range before hitting the wall ; simultaneously, maintaining intensity allows erythropoiesis to outpace hemolysis, expanding red cell volume and creating a supercharged hemodynamic engine ; at the cellular level, Type IIa fast-twitch oxidative fibers undergo significant hypertrophy and a 2.5-fold increase in peak power, essential for late-race surging. To unlock this peak, implement a 14 to 21-day exponential taper cutting total volume by 41-60% while strictly maintaining your training frequency and marathon pace intensity ; dropping volume clears fatigue, but high intensity serves as the critical retention signal for oxidative enzymes like citrate synthase and blood volume. Avoid the obsolete carbohydrate depletion phase—simply increase intake to 10-12g/kg while tapering—and recognize that late-stage phantom pains are just central sensitization from your nervous system, not new injuries. Embrace the enforced rest that gave Emil Zátopek his accidental triple-gold at the 1952 Olympics, proving that optimal freshness will always outperform callous overtraining.Keywords: taper, marathon, glycogen supercompensation, volume reduction, type iia fibers, central sensitization, recovery🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bosquet, L., et al. (2007). Effects of tapering on performance: a meta-analysis. PubMed. https://pubmed.ncbi.nlm.nih.gov/17762369/Shepley, B., et al. (1992). Physiological effects of tapering in highly trained athletes. PubMed. https://pubmed.ncbi.nlm.nih.gov/1559951/Trappe, S., et al. (2000). Effect of swim taper on whole muscle and single fiber contractile properties. ResearchGate. https://www.researchgate.net/publication/12106261_Effect_of_swim_taper_on_whole_muscle_and_single_fiber_contractile_propertiesCampbell, J. P., & Turner, J. E. (2018). Debunking the Myth of Exercise-Induced Immune Suppression: Redefining the Impact of Exercise on Immunological Health Across the Lifespan. NIH. https://pmc.ncbi.nlm.nih.gov/articles/PMC5911985/Mujika, I., & Padilla, S. (2003). Scientific Bases for Precompetition Tapering Strategies. Free. http://robin.candau.free.fr/Mujika_Padilla.pdfVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 43 : Power Meters Explained The #1 Data Tool for Serious Athletes ⚡💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Stop guessing your effort based on speed or heart rate; while your pulse is a lagging biological proxy influenced by caffeine and heat, a power meter measures the absolute mechanical stress you produce. By solving the physics equation of torque multiplied by angular velocity, these devices reveal your true metabolic cost ; physiologically, this allows you to determine your Critical Power, the ceiling of your sustainable aerobic output linked to your VO₂max, and monitor your W Prime, the finite anaerobic battery you drain when attacking. To train effectively, stop accumulating junk miles by half-wheeling your friends, and instead use Normalized Power and Training Stress Scores to precisely dose your workload ; you must also remember to perform frequent zero-offset calibrations to prevent temperature-induced data drift. Be cautious with single-sided meters that simply double your left-leg power, as muscular asymmetry fluctuates under fatigue, and abandon the myth of the circular pedal stroke—science proves that actively pulling up on the pedals wastes metabolic energy. Ultimately, true elite performance isn't just about fresh peak wattage, but durability, perfectly illustrated when Mathieu van der Poel unleashed a 1,362-watt sprint after four and a half hours of racing.Keywords: power meter, critical power, threshold, w prime, normalized power, biomechanics, watts🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bouillod, A., et al. (2022). Caveats and Recommendations to Assess the Validity and Reliability of Cycling Power Meters: A Systematic Scoping Review. https://www.researchgate.net/publication/357604325_Caveats_and_Recommendations_to_Assess_the_Validity_and_Reliability_of_Cycling_Power_Meters_A_Systematic_Scoping_ReviewJones, A. M., et al. (2010). Critical Power: Implications for the Determination of VO2max and Exercise Tolerance. https://www.researchgate.net/publication/283651849_Critical_Power_Implications_for_the_Determination_of_VO2max_and_Exercise_ToleranceMonod, H., & Scherrer, J. (1965). The Work Capacity of a Synergic Muscular Group. Science & Cycling. https://science-cycling.org/wp-content/uploads/2018/06/Charles-Dauwe.pdfCoggan, A. (2003). Training and racing using a power meter: an introduction. Semantic Scholar. https://www.semanticscholar.org/paper/Training-and-racing-using-a-power-meter%3A-an-Coggan/dd2a5c3bce97fe2bc526cdd8b1cda643b44bd346TrainingPeaks. (n.d.). Normalized Power, Intensity Factor and Training Stress Score. https://www.trainingpeaks.com/learn/articles/normalized-power-intensity-factor-training-stress/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 42 : MARATHON PREP #2 How to Demolish "The Wall" Before You Even Start 🧱💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The Wall is not a metaphor for fatigue; it is a quantifiable bioenergetic and neurological crisis where the body's safety mechanisms override your will. You face an inevitable thermodynamic deficit: a marathon requires roughly 2,950 kcal, but your body only stores around 2,000-2,200 kcal of glycogen. When your leg muscle glycogen drops below 70 mmol/kg, your engine shifts from fast carbohydrate oxidation to slower lipid oxidation, while your brain's Central Governor preemptively induces fatigue to prevent homeostatic failure. Your pacing and VO₂ max dictate this mathematical limit; exceeding your optimal speed burns fuel exponentially. To demolish this barrier, elites utilize gut training to absorb 90-120g of carbohydrates per hour using hydrogel technology, bypassing the traditional 60g/h intestinal limit to spare liver glycogen. As an amateur, you should target a safe zone of 30-60g/h to avoid gastrointestinal distress, coupled with a 36-48 hour supercompensation protocol of 10-12g/kg of carbohydrates. The physical reality of peripheral failure was starkly demonstrated in 2015 when Hyvon Ngetich physically crawled to the finish line after her glycogen hit absolute zero.Keywords: marathon, glycogen, central governor, hydrogel, carbohydrates, pacing, supercompensation, the wall🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bergström, J., & Hultman, E. (1967). A study of the glycogen metabolism during exercise in man. Scandinavian Journal of Clinical and Laboratory Investigation, 19(3), 218-228.Rapoport, B. I. (2010). Metabolic factors limiting performance in marathon runners. PLoS Computational Biology, 6(10), e1000960. https://pmc.ncbi.nlm.nih.gov/articles/PMC2958805/Volek, J. S., Freidenreich, D. J., Saenz, C., et al. (2016). Metabolic characteristics of keto-adapted ultra-endurance runners. Metabolism, 65(3), 100-110. https://www.researchgate.net/publication/283976781_Metabolic_characteristics_of_keto-adapted_ultra-endurance_runnersNoakes, T. D. (1997). 1996 J.B. Wolffe Memorial Lecture. Challenging beliefs: ex Africa semper aliquid novi. Medicine and Science in Sports and Exercise, 29(5), 571-590.Sherman, W. M., Costill, D. L., Fink, W. J., & Miller, J. M. (1981). Effect of exercise-diet manipulation on muscle glycogen and its subsequent utilization during performance. International Journal of Sports Medicine, 2(2), 114-118.Viribay, A., Arribalzaga, S., Mielgo-Ayuso, J., et al. (2020). Effects of 120 g/h of Carbohydrates Intake during a Mountain Marathon on Exercise-Induced Muscle Damage in Elite Runners. Nutrients, 12(5), 1367. https://pmc.ncbi.nlm.nih.gov/articles/PMC7284742/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 41 : Gut Check How to Avoid Race-Ruining Stomach Problems 🏃‍♂️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: For decades, endurance athletes have feared the sudden, catastrophic urge to defecate or vomit during competition, often blaming bad food when the reality is a predictable physiological failure. As you push toward your VO₂max, your sympathetic nervous system aggressively shunts up to 80% of blood flow away from the gut to prioritize skeletal muscles and skin cooling, causing profound splanchnic ischemia ; this energy crisis depletes ATP, dismantles cellular tight junctions, and allows endotoxins to breach the bloodstream, triggering a cytokine storm that forces your body to shut down. To survive this bottleneck, elite athletes "train the gut" starting 6-10 weeks before a race, beginning at 60 grams of carbohydrates per hour and ramping up by 10 grams weekly to hit 90 grams per hour; this method physically upregulates SGLT1 and GLUT5 transporters to prevent pooling. To further protect your system, strictly avoid hypertonic gels mixed with sugary sports drinks and ditch fermentable FODMAPs like wheat fructans 24-48 hours pre-race rather than blaming gluten. It is a brutal reality of the sport, immortalized when Paula Radcliffe bravely stopped by the roadside during her 2005 London Marathon victory, proving that gastrointestinal distress is a manageable crisis rather than a career-ender.Keywords: ischemia, gut training, carbohydrates, endotoxemia, fodmaps, transporters, dehydration, endurance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :van Wijck, K., et al. (2012). Physiology and pathophysiology of splanchnic hypoperfusion and intestinal injury during exercise. American Journal of Physiology-Gastrointestinal and Liver Physiology. https://journals.physiology.org/doi/pdf/10.1152/ajpgi.00066.2012Jeukendrup, A. E. (2017). Training the Gut for Athletes. Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC5371619/Sullivan, S. N., & Wong, C. (1992). Runners' diarrhea. Different patterns and associated factors. Journal of Clinical Gastroenterology.Lis, D., et al. (2019). Commercial Hype vs Reality: Gluten and the Athlete. Current Sports Medicine Reports. https://pmc.ncbi.nlm.nih.gov/articles/PMC6445805/Costa, R. J. S., et al. (2017). Exercise-Associated Gastrointestinal Symptoms consensus statement. British Journal of Sports Medicine.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 40 : MARATHON PREP #1 The Ultimate Guide to Race Day Nutrition ⚡💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:While early marathoners relied on brandy and strychnine, modern performance is defined by the strategic manipulation of bioavailability under physiological duress. At race intensities of 75-85% VO2max, you sit on a metabolic tipping point where endogenous glycogen stores (<100 mmol/kg) become the limiting substrate, forcing the brain to downregulate motor output to prevent catastrophic fatigue ; the bottleneck is not gastric emptying but intestinal absorption, where SGLT1 transporters saturate at 60g/hour, though combining glucose with fructose (GLUT5) unlocks oxidation rates exceeding 100g/hour. To capitalize on this, implement a supercompensation protocol of 10-12g/kg carbohydrates for 36-48 hours pre-race to double muscle glycogen 4; on race day, aim for 90-120g/hour if elite with a trained gut, or 30-60g/hour if amateur, utilizing hydrogels to minimize GI distress during ischemia. While low-carb (LCHF) strategies may serve ultra-endurance, they impair high-intensity economy required for the marathon, proving that while you can run on fat, you cannot run your fastest marathon without glycolytic flux.Keywords:marathon, nutrition, glycogen, vo2max, hydrogel, glucose, fructose, hydration, gut training, performance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bergström, J., & Hultman, E. (1966). Muscle glycogen synthesis after exercise: an enhancing factor localized to the muscle cells in man. Nature.Costill, D. L., Sparks, K., Gregor, R., & Turner, C. (1971). Muscle glycogen utilization during exhaustive running. Journal of Applied Physiology. https://pubmed.ncbi.nlm.nih.gov/5111852/Jentjens, R., & Jeukendrup, A. E. (2004). Oxidation of combined ingestion of glucose and fructose during exercise. Journal of Applied Physiology. https://journals.physiology.org/doi/10.1152/japplphysiol.00974.2003Burke, L. M., et al. (2017). Low carbohydrate, high fat diet impairs exercise economy and performance in elite endurance athletes. Journal of Physiology. [Referencing general LCHF findings in report].American College of Sports Medicine. (2007). Position Stand: Exercise and Fluid Replacement. https://www.khsaa.org/sportsmedicine/heat/exerciseandfluidreplacement.pdfVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 39 : Carbon Plate Shoes Miracle or Marketing? The ULTIMATE Guide 👟💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Marketing sells you a spring, but biomechanics reveals a lever. This episode dissects the "Super Shoe" paradigm where the high-stack PEBA foam acts as the engine returning 87% of energy, while the curved carbon plate provides the steering and stability that makes the foam usable; research validates a running economy improvement of 2.7% to 4.2%, but this is velocity-dependent, with benefits diminishing significantly below 14 km/h where the stiffness may become detrimental. We analyze the critical role of rocker geometry in offloading calf muscles and the "teeter-totter" effect, while cautioning against the new injury phenotype of navicular stress fractures caused by exclusive use; you will learn why "super trainers" might be better for daily miles, why the foam dies after 450 km, and how Fila pioneered this decades before Nike's Vaporfly changed the sport's history.Keywords: peba foam, carbon plate, running economy, biomechanics, marathon, nike vaporfly, injury prevention, navicular stress, super shoes, velocity threshold🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Hoogkamer, W., Kipp, S., Frank, J. H., Farina, E. M., Luo, G., & Kram, R. (2018). A Comparison of the Energetic Cost of Running in Marathon Racing Shoes. Sports Medicine, 48(4), 1009-1019. https://doi.org/10.1007/s40279-017-0811-2Joubert, D. P., & Jones, G. P. (2022). A Comparison of Running Economy Across Seven Carbon-Plated Racing Shoes. Footwear Science, 14(3). https://doi.org/10.1080/19424280.2022.2038691Tenforde, A. S., Hoenig, T., Saxena, A., & Hollander, K. (2023). Bone Stress Injuries in Runners Using Carbon Fiber Plate Footwear. Sports Medicine, 53(8), 1499-1505. https://doi.org/10.1007/s40279-023-01818-zAgresta, C., Giacomazzi, C., Harrast, M., & Zendler, J. (2022). Running Injury Paradigms and Their Influence on Footwear Design Features. Frontiers in Sports and Active Living, 4. https://doi.org/10.3389/fspor.2022.8156755Barnes, K. R., & Kilding, A. E. (2019). A Randomized Crossover Study Investigating the Running Economy of Highly-Trained Male and Female Distance Runners in Marathon Racing Shoes versus Track Spikes. Sports Medicine, 49(2), 331-342.Rodrigo-Carranza, V., et al. (2022). The effects of footwear midsole longitudinal bending stiffness on running economy and biomechanics. European Journal of Sport Science.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 38 : Episode 38 [CODE #7] The Ketone HYPE Miracle Fuel or Marketing Gimmick? 🧪💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:From a $10 million DARPA military project to the "jet fuel" of the professional peloton, exogenous ketones promise a dual-fuel state previously impossible in human evolution; achieving nutritional ketosis (>0.5 mM) while maintaining full glycogen stores. The physiology is rigorous but double-edged: while ketone esters increase thermodynamic efficiency (higher P/O ratio) and spare muscle glycogen by entering the Krebs Cycle directly as Acetyl-CoA, they simultaneously inhibit the Pyruvate Dehydrogenase Complex (PDH), effectively braking glycolysis and capping high-intensity anaerobic power. For training, this dictates a strict protocol: avoid usage during criteriums, VO₂max intervals, or stochastic racing where sprint power is required; instead, utilize esters immediately post-exercise to upregulate mTOR and accelerate glycogen resynthesis, or reserve them for steady-state ultra-endurance efforts exceeding six hours where intensity remains sub-threshold. The nuance lies in the formulation hierarchy, as common salts often fail to reach therapeutic levels (>2 mM) and carry massive sodium loads, while the gold-standard monoesters risk severe gastrointestinal distress, famously rumored to have impacted Tom Dumoulin’s 2017 Giro d'Italia.Keywords: exogenous ketones, ketone esters, dual fuel, glycogen sparing, pdh inhibition, recovery, mtor, darpa, ultra-endurance, metabolic flexibility🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Cox, P. J., et al. (2016). Nutritional Ketosis Alters Fuel Preference and Thereby Endurance Performance in Athletes. Cell Metabolism. https://doi.org/10.1016/j.cmet.2016.07.010Leckey, J. J., et al. (2017). Ketone Diester Ingestion Impairs Time-Trial Performance in Professional Cyclists. Frontiers in Physiology. https://doi.org/10.3389/fphys.2017.00806Poffé, C., et al. (2019). Exogenous Ketosis Impacts Training Overload and Recovery. American Journal of Physiology-Cell Physiology. https://doi.org/10.1152/ajpcell.00098.2019NIH. (2025). The Effect of Exogenous Ketone Bodies on Cognition: A Systematic Review. https://pmc.ncbi.nlm.nih.gov/articles/PMC12458514/Veech, R. (2003). Development of Ketone Ester Diets. NIH Grant Z01-AA000112-01. https://grantome.com/grant/NIH/Z01-AA000112-01Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 37 : The "Second Brain": Is Your Gut Bacteria Deciding Your Finish Time? 🧠💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Stop viewing your body as a solitary machine; science confirms you are a "holobiont," a vessel for trillions of microorganisms that dictate your metabolic efficiency and psychological drive. The physiological game-changer is Veillonella atypica, a bacteria that feasts on the lactate produced during maximal effort and converts it into propionate, a short-chain fatty acid that provides secondary fuel and boosts endurance by 13% in murine models. However, intense exercise causes splanchnic ischemia (blood flow <20%), leading to tight junction failure and "leaky gut," where toxic LPS floods the bloodstream and triggers systemic collapse. To harness your microbiome, manage the "FODMAP paradox": eat high-fiber diversity during training blocks, but switch to low-FODMAP foods 24–48 hours pre-race to minimize gas; simultaneously, practice "gut training" with high carb volumes to upregulate SGLT1 transporters. Be wary of antibiotics, which can slash voluntary training volume by 21% by disrupting dopamine signaling, and remember that the resilient "elite signature" found in rugby players vanishes weeks after training stops.Keywords:microbiome, veillonella, lactate, leaky gut, probiotics, holobiont, fodmap, endotoxemia, dopamine, ischemia🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Scheiman, A. B., et al. (2019). Meta-omics analysis of elite athletes identifies a performance-enhancing microbe that functions via lactate metabolism. Nature Medicine. https://pubmed.ncbi.nlm.nih.gov/31235964/Clarke, S. F., et al. (2014). Exercise and associated dietary extremes impact on gut microbial diversity. Gut. https://gut.bmj.com/content/63/12/1913Brock-Utne, J. G., et al. (1988). Endotoxaemia in exhausted runners after a long-distance race. South African Medical Journal. https://journals.co.za/doi/pdf/10.10520/AJA20785135_9151Mach, N., & Fuster-Botella, D. (2017). Endurance exercise and gut microbiota: A review. Journal of Sport and Health Science. https://pmc.ncbi.nlm.nih.gov/articles/PMC6188999/Roussos, G., et al. (2025). Gastrointestinal function and microbiota in endurance athletes. Frontiers in Physiology. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2025.1551284/fullO’Sullivan, et al. (2022). Oral antibiotics reduce voluntary exercise behavior in athletic mice. Behavioural Processes. https://pmc.ncbi.nlm.nih.gov/articles/PMC9725099/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 36 : Gels, Bars & Powders Your Ultimate Guide to Choosing the Right Fuel ⛽💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:From the strychnine cocktails of 1904 to the hydrogel technology fueling modern sub-2-hour marathons, sports nutrition has evolved from dangerous folklore to precise molecular engineering designed to bypass physiological bottlenecks. The primary limiter in endurance efforts exceeding 90 minutes is glycogen depletion, yet the body’s SGLT1 intestinal transporter saturates at a "speed limit" of roughly 60g/h; exceeding this with single-source carbs leads to GI distress rather than performance gains. To unlock higher oxidation rates, elite protocols utilize multiple transportable carbohydrates—specifically a Glucose:Fructose ratio (classically 2:1, now optimizing toward 1:0.8)—to engage the independent GLUT5 transporter, allowing intake of 90-120g/h and oxidation rates up to 1.75g/min. While elites spend 6-10 weeks "training the gut" to tolerate these volumes, you should aim for a safe baseline of 60g/h using isotonic gels or drink mixes every 20 minutes, avoiding solids during high-intensity efforts (>75% VO₂max) where gastric emptying slows significantly. Always chase hypertonic gels with water to prevent the duodenal brake from trapping fluid in your gut, a critical mistake that leads to dehydration and bloating.Keywords: sports nutrition, glycogen depletion, sglt1 transporter, hydrogel, glucose fructose ratio, gastric emptying, endurance fueling, bonking, gut training, isotonic.🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Coyle, E. F., Coggan, A. R., Hemmert, M. K., & Ivy, J. L. (1986). Muscle glycogen utilization during prolonged strenuous exercise when fed carbohydrate. Journal of Applied Physiology, 61(1), 165-172.Jentjens, R. L., et al. (2004). Oxidation of combined ingestion of glucose and fructose during exercise. Journal of Applied Physiology, 96(4), 1277-1284.Jeukendrup, A. E. (2004). Carbohydrate intake during exercise and performance. Nutrition, 20(7-8), 669-677.King, A., et al. (2020). Carbohydrate Hydrogel Products Do Not Improve Performance or Gastrointestinal Distress During Moderate-Intensity Endurance Exercise. International Journal of Sport Nutrition and Exercise Metabolism, 30(5), 305-314.Rowe, J. T., et al. (2022). Graphite-hydrogel ingestion improves 5-km running performance. Medicine & Science in Sports & Exercise.American College of Sports Medicine (ACSM). (2016). Nutrition and Athletic Performance. Medicine & Science in Sports & Exercise, 48(3), 543-568.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 35 : Is Your WATCH Lying To You? The Truth About HRV ⌚💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Your recovery score says you’re wrecked, but you feel ready to crush a PR—discover why your wearable might be gaslighting your physiology. Heart rate variability (HRV) is not about stability, but chaos; a healthy heart acts as a fractal mirror of the environment, balancing the slow sympathetic "gas" against the rapid parasympathetic "brake" of the vagus nerve. While photoplethysmography sensors in devices like Whoop or Oura match gold-standard ECGs with correlations over 0.99, the "lie" hides in proprietary black-box algorithms that penalize sleep stages or activity balances regardless of your actual autonomic status (RMSSD). High HRV signals robust neurovisceral integration where the prefrontal cortex inhibits the amygdala, whereas low HRV predicts rigidity and mortality. Stop chasing gamified "readiness" scores and use the Plews & Seiler decision tree on raw data: establish a 7-day rolling average baseline with a smallest worthwhile change range. If your HRV is within range, train hard; if significantly low, stick to Zone 1/2 recovery; if remarkably high, beware of parasympathetic hyperactivity signaling impending illness. For elite athletes with low resting heart rates (<50 bpm), switch to morning orthostatic readings to avoid parasympathetic saturation and unmask fatigue. Beware of orthosomnia, where the anxiety of tracking degrades sleep, and remember the blue whale: its heart drops to 2 bpm to survive depth, proving that extreme variability is the ultimate adaptation strategy.Keywords: hrv, rmssd, autonomic nervous system, vagus nerve, recovery, orthosomnia, whoop, oura, plews, seiler🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Dial, M. B., et al. (2025). Validation of nocturnal resting heart rate and heart rate variability in consumer wearables. Physiological Reports.Miller, D. J., et al. (2022). Validation of the WHOOP 3.0 for the assessment of heart rate variability. Sensors.Thayer, J. F., & Lane, R. D. (2000). A model of neurovisceral integration in emotion regulation and dysregulation. Journal of Affective Disorders.Plews, D. J., et al. (2013). Heart rate variability in elite triathletes, is variation good? European Journal of Sport Science.Task Force of the European Society of Cardiology. (1996). Heart rate variability: standards of measurement, physiological interpretation and clinical use. Circulation.Kromenacker, B. W., et al. (2022). Root mean square of successive differences is not a valid measure of parasympathetic reactivity during slow deep breathing. American Journal of Physiology.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 34 [CODE #6] The Altitude Code Is "Live High, Train Low" The Only Way? 🏔️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:To get fit, you must go where the air is thin; to get fast, you must go where the air is thick. This "oxygen paradox" is resolved by the "Live High, Train Low" (LHTL) model, which isolates physiological adaptations from training intensity. The hypoxic stress of living at 2,000–2,500m stabilizes the HIF-1 alpha transcription factor, triggering the kidneys to release erythropoietin (EPO) and driving the bone marrow to increase hemoglobin mass (Hbmass) and VO₂max; however, this mechanism strictly requires iron stores with ferritin levels >50 µg/L to function. To avoid the neuromuscular detraining seen in "Live High, Train High" approaches, you must descend to below 1,250m for high-intensity sessions. While 3–4 weeks at altitude provides the optimal blood-boosting dose, heat training has emerged as a "poor man's altitude," expanding plasma volume to maintain these gains. Be aware of the "neocytolysis" effect upon return, where the body culls young red blood cells, and the stark genetic reality that some athletes are simply non-responders. From the tragic 1875 Zénith balloon ascent to modern nitrogen houses, the quest for oxygen remains the defining limit of performance.Keywords: altitude training, hypoxia, erythropoietin, hemoglobin mass, vo2max, heat training, iron deficiency, physiology, endurance, lhtl🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Levine, B. D., & Stray-Gundersen, J. (1997). 'Living high-training low': Effect of moderate-altitude acclimatization with low-altitude training on performance. Journal of Applied Physiology.Chapman, R. F., et al. (1998). Individual variation in response to altitude training. Journal of Applied Physiology.Siebenmann, C., et al. (2012). The placebo effect of mountain air. Journal of Applied Physiology.Lundby, C., & Robach, P. (2025). Altitude or heat training to increase haemoglobin mass and endurance exercise performance in elite sport. Fisiología del Ejercicio.West, J. B. (2015). History of high altitude medicine and physiology. Thoracic Key.Gore, C. J., et al. (2013). Altitude training. In Encyclopedia of Exercise Medicine in Health and Disease.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 33 : Strength for Cyclists - The POWERHOUSE Exercises You Aren't Doing 🏋️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:The history of cycling performance has shifted from the volume-heavy dogma of Fausto Coppi to a modern era of biomechanical optimization where the gym is a non-negotiable engine builder. Heavy resistance training (≥85% 1RM) triggers critical neural adaptations—specifically rate coding and motor unit recruitment—that improve cycling economy and delay Type II fiber fatigue without adding detrimental mass, while single-leg exercises utilize "luxury perfusion" to bypass central cardiovascular limits. To unlock these gains, implement the "Powerhouse" protocol: prioritize heavy single-leg step-ups and hex bar deadlifts (3–5 sets of 4–6 reps) to secure the posterior chain, and perform seated calf raises to target the soleus; ensure a 6–24 hour separation between lifting and riding to manage the AMPK-mTOR interference effect. Beyond raw power, strengthen the hip flexors to eliminate dead spots in your upstroke and incorporate plyometrics for osteogenic health. From Graeme Obree’s washing machine bearings to Robert Förstemann’s toaster-blowing wattage, this approach transforms you from a pair of lungs into a complete machine.Keywords:cycling economy, neural adaptation, single-leg training, soleus, hip flexors, interference effect, heavy strength training, posterior chain, plyometrics🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Abbiss, C. R., et al. (2010). Single-leg cycle training is superior to double-leg cycling in improving the oxidative potential and metabolic profile of trained skeletal muscle. Journal of Applied Physiology. https://journals.physiology.org/doi/10.1152/japplphysiol.01247.2010Rønnestad, B. R., et al. (2025). Heavy strength training effects on physiological determinants of endurance cyclist performance: a systematic review with meta-analysis. PubMed. https://pubmed.ncbi.nlm.nih.gov/40632222/Kinzey, S. J., et al. (2024). Triceps surae muscle hypertrophy is greater after standing versus seated calf-raise training. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC10753835/Markovic, G. (2007). Does plyometric training improve vertical jump height? A meta-analytical review. British Journal of Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC2465309/Held, T., et al. (2025). Effects of blood flow restriction training on aerobic capacity and performance in endurance athletes: a systematic review. Fisiología del Ejercicio. https://www.fisiologiadelejercicio.com/wp-content/uploads/2025/07/Effects-of-blood-flow-restriction-training.pdfBurns, M. J., et al. (2014). Single-leg cycling to maintain and improve function in healthy and clinical populations. Frontiers in Physiology. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2023.1105772/fullVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 32 [CODE #5] The Heat Adaptation Code: Turn a Furnace Into Your Advantage 🔥💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Heat adaptation is not merely a transient state of comfort but a systemic biological reconstruction that acts as an offensive performance enhancer, potentially functioning as a "poor man's altitude" for cool-weather gains; the physiological overhaul begins with hypervolemia, a 6.5% to 13% expansion of plasma volume within 3–6 days that boosts stroke volume and lowers heart rate by 12–18 bpm (bradycardia), while sudomotor remodeling increases sweat rates by 20% and the aldosterone pathway reduces sweat sodium concentration by up to 50% to preserve electrolytes. To engineer these adaptations, protocols range from "Active Heat Acclimation" comprising 60–90 minutes of Zone 1–2 exercise in 30–35°C heat to "Passive Heating" via post-exercise hot water immersion (~40°C for 20–30 minutes), with elite strategies utilizing "Controlled Hyperthermia" to clamp rectal temperature (e.g., 38.5°C) for precise heat shock protein transcription. These adaptations are rented, not owned, decaying at ~2.5% per day without exposure, necessitating top-up sessions every 2–3 days during tapering; history underscores the stakes, from Charles Blagden’s 1774 survival in a 127°C room proving the power of evaporation to the cerebral hyperthermia-induced hallucinations of "Badwater" ultramarathon runners.Keywords:heat adaptation, hypervolemia, plasma volume, heat shock proteins, aldosterone, sudomotor remodeling, heat acclimation, core temperature🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Tyler, C. J., Reeve, T., Hodges, G. J., & Cheung, S. S. (2016). The effects of heat adaptation on physiology, perception and exercise performance in the heat: A meta-analysis. Sports Medicine.Nielsen, B., Hales, J. R., Strange, S., Christensen, N. J., Warberg, J., & Saltin, B. (1993). Human circulatory and thermoregulatory adaptations with heat acclimation and exercise in a hot, dry environment. The Journal of Physiology.Lorenzo, S., Halliwill, J. R., Sawka, M. N., & Minson, C. T. (2010). Heat acclimation improves exercise performance in a cool environment. Journal of Applied Physiology.Karlsen, A., et al. (2015). Heat acclimatization does not improve exercise performance in a cool condition. Scandinavian Journal of Medicine & Science in Sports.Périard, J. D., et al. (2015). Adaptations and mechanisms of human heat acclimation. Scandinavian Journal of Medicine & Science in Sports.Gibson, O. R., et al. (2015). Isothermic vs Fixed Intensity Heat Acclimation. Journal of Thermal Biology.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 31 : Run Faster Without Running More? The Scientific Truth About Plyometrics 🚀💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Runners often hit a physiological ceiling where accumulating more mileage fails to improve speed; the solution lies not in building a bigger aerobic engine, but in engineering a more efficient chassis. By targeting the Stretch-Shortening Cycle (SSC) and increasing musculotendinous stiffness, plyometrics minimizes energy dissipated as heat (hysteresis) and optimizes the myotatic reflex to recycle ground reaction forces. This adaptation improves Running Economy (RE) by 2–8% independent of VO₂max, effectively turning the legs from compliant shock absorbers into reactive springs. A proper protocol requires a minimum effective dose over 6–10 weeks; amateurs must progress from landing mechanics (snap downs, 40–60 contacts) to extensive rhythm work (pogo hops, 80–120 contacts) before attempting intensive power (box jumps), while avoiding fatigue which degrades the critical neural signal. From Fred Wilt’s FBI surveillance of Soviet "shock methods" to Eliud Kipchoge’s rhythmic step drills in Kaptagat, stiffness remains the hidden variable of elite endurance performance.Keywords: plyometrics, running economy, tendon stiffness, stretch-shortening cycle, neuromuscular training, shock method, injury prevention, biomechanics🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Paavolainen, L., Häkkinen, K., Hämäläinen, I., Nummela, A., & Rusko, H. (1999). Explosive-strength training improves 5-km running time by improving running economy and muscle power. Journal of Applied Physiology, 86(5), 1527-1533. https://doi.org/10.1152/jappl.1999.86.5.1527Saunders, P. U., et al. (2006). Short-term plyometric training improves running economy in highly trained middle and long distance runners. Journal of Strength and Conditioning Research, 20(4), 947-954.Spurrs, R. W., Murphy, A. J., & Watsford, M. L. (2003). The effect of plyometric training on distance running performance. European Journal of Applied Physiology, 89(1), 1-7.Eihara, Y., et al. (2022). Heavy Resistance Training Versus Plyometric Training for Improving Running Economy and Running Time Trial Performance: A Systematic Review and Meta-analysis. Sports Medicine - Open, 8(1), 138.Kubo, K., Ishigaki, T., & Ikebukuro, T. (2017). Effects of plyometric and isometric training on muscle and tendon stiffness in vivo. Physiological Reports, 5(15), e13374.Verkhoshansky, Y. (1968). The Shock Method of the development of explosive strength. Theory and Practice of Physical Culture, 8.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 30 : [CODE #4] Shut Your Mouth to Run Faster? The Science of Nasal Breathing 🏃💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:The transition from viewing breathing as a background function to a primary metabolic determinant reveals that nasal respiration is a sophisticated chemical regulator rather than a simple set of bellows1111. While oral breathing allows for higher air volume, it frequently causes "overbreathing," leading to excessive carbon dioxide ($CO_{2}$) expulsion and impaired oxygen delivery to tissues via the Bohr Effect2. Nasal breathing provides intrinsic resistance that maintains $CO_{2}$ tension and introduces nasally-derived nitric oxide ($NO$), a potent vasodilator that improves pulmonary hemodynamics3333. To adapt, athletes should follow a gradual protocol starting with walking (4 steps in/4 steps out) to build $CO_{2}$ tolerance, eventually integrating nasal breathing into 80% of training4. Research by George Dallam shows that adapted runners can match their oral $VO_{2}max$ with 22% less total air, significantly improving respiratory economy5555. This physiological shift is exemplified by elite athletes like Erling Haaland and Iga Świątek, who use mouth taping to ensure nasal respiration during sleep or low-intensity training to enhance recovery and mental calm6666.Keywords:nasal breathing, bohr effect, nitric oxide, $VO_{2}max$, respiratory economy, hyperventilation, mouth taping, $CO_{2}$ tolerance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Dallam, G., & Kies, B. (2020). The Effect of Nasal Breathing Versus Oral and Oronasal Breathing During Exercise: A Review. Journal of Sports Research, 7(1), 1-10. https://ideas.repec.org/a/pkp/josres/v7y2020i1p1-10id2805.htmlDallam, G. M., McClaran, S. R., Cox, D. G., & Foust, C. P. (2018). Effect of Nasal Versus Oral Breathing on $VO_{2}max$ and Physiological Economy in Recreational Runners Following an Extended Period Spent Using Nasally Restricted Breathing. International Journal of Kinesiology and Sports Science, 6(2), 22-29. https://doi.org/10.2478/ijkss-2018-0002Mapelli, M., et al. (2025). Nasal vs. oral BREATHing Win Strategies in healthy individuals during cardiorespiratory Exercise testing (BreathWISE). PLOS One. https://doi.org/10.1371/journal.pone.0326661Recinto, C., et al. (2025). Effect of Oral Versus Nasal Breathing on Muscular Performance, Muscle Oxygenation, and Post-Exercise Recovery. Sports. https://doi.org/10.3390/sports13100368Raphael, A. D., & Dallam, G. M. (2024). Could Nasal Breathing During Exercise Inhibit the Development of Cardiac Fibrosis and Arrhythmia Associated with Endurance Training? International Journal of Physical Education, Fitness and Sports. https://www.ijpefs.org/index.php/ijpefs/article/view/608Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 29 : The Indoor Training Dilemma What You REALLY Gain (and Lose) 🚴💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: From its origins as a nineteenth-century instrument of penal labor to its role as a cornerstone of modern athletic preparation; indoor training presents a fundamental conflict where athletes struggle to match outdoor power outputs despite equivalent perceived effort. This "indoor training dilemma" is driven by thermoregulatory strain and biomechanical stasis—most notably the lack of convective cooling which leads to a rapid rise in core temperature and a physiological down-regulation of power by 10-30%. Biomechanically; stationary trainers eliminate natural lateral sway and alter muscle activation; specifically reducing gluteus maximus involvement and shifting the burden to the quadriceps. To bridge this gap; you must prioritize aggressive cooling to maintain the thermal gradient and adapt training zones to account for the "thermal tax" of the stationary environment. The victory of Mathew Hayman at the 2016 Paris-Roubaix—prepared almost entirely in a garage with specialized intervals—remains the ultimate vindication of using indoor stasis as a high-performance tool.Keywords: indoor training, thermoregulation, power output, biomechanics, heat stress, cycling physiology, treadmill running, virtual cycling🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Mieras, M. E., Heesch, M. W., & Slivka, D. R. (2014). Physiological and Psychological Responses to Laboratory vs. Outdoor Cycling. Journal of Strength and Conditioning Research, 28(8), 2324-2329. https://pubmed.ncbi.nlm.nih.gov/244767761Chou, C., & Li, Y. (2024). Comparison of FTP Tests in Outdoor and Laboratory Settings. Science and Cycling Conference Proceedings. https://science-cycling.org/wp-content/uploads/2024/06/Chou-Li-Revision.pdfSinclair, J., Richards, J., Taylor, P. J., Edmundson, C. J., Brooks, D., & Hobbs, S. J. (2013). 3-D kinematic comparison of treadmill and overground running. Sports Biomechanics, 12(1), 10-20. https://doi.org/10.1080/14763141.2012.724701Weston, K. G., & Drust, B. (2024). Training, environmental and nutritional practices in indoor cycling. Frontiers in Sports and Active Living, 6, 1433368. https://www.frontiersin.org/articles/10.3389/fspor.2024.1433368/fullSola, I. (2024). Physiological and Biomechanical Responses to Indoor Cycling with and without the Ability to Sway. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC12143274/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 28 : [CODE #3] The Caffeine Code The PERFECT Dose and Timing for Your Next PR ☕💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: You might be one cup of coffee away from a personal record or a physiological failure; the difference lies in your genetic code rather than just your willpower. Modern science has shifted focus from the muscles to the mind, identifying caffeine as a competitive antagonist of adenosine receptors that lowers your Rating of Perceived Exertion (RPE) and facilitates calcium ion mobilization for more forceful muscle contractions. To optimize your performance, you should target a dose of 3–6 mg/kg of body mass approximately 60 minutes before exercise, though newer delivery systems like chewing gum can compress this window to 15–20 minutes through buccal absorption. While aerobic endurance athletes typically see 2–4% improvements, those with the CYP1A2 AA genotype (fast metabolizers) can see gains up to 6.8%, whereas CC genotypes (slow metabolizers) may experience ergolytic effects that actually slow them down. Current research is now expanding to address the historical male bias in data by investigating how hormonal shifts during the menstrual cycle affect caffeine’s efficacy in women. The 1904 St. Louis Olympic marathon stands as a bizarre reminder of the unregulated dawn of chemical enhancement, where Thomas Hicks won using a cocktail of strychnine and brandy.Keywords: caffeine, ergogenic aid, cyp1a2, rpe, adenosine, endurance, sports nutrition, metabolic rate, performance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Costill, D. L., Dalsky, G. P., & Fink, W. J. (1978). Effects of caffeine ingestion on metabolism and exercise performance. Medicine and Science in Sports, 10(3), 155-158. https://doi.org/10.1249/00005768-197801030-00007Graham, T. E., & Spriet, L. L. (1995). Metabolic, catecholamine, and exercise performance responses to various doses of caffeine. Journal of Applied Physiology, 78(3), 867-874. https://doi.org/10.1152/jappl.1995.78.3.867Grgic, J., et al. (2018). Effects of caffeine intake on muscle strength and power: A systematic review and meta-analysis. Journal of the International Society of Sports Nutrition, 15(1). https://doi.org/10.1186/s12970-018-0216-0Guest, N. S., et al. (2018). Caffeine, CYP1A2 Genotype, and Endurance Performance in Athletes. Medicine and Science in Sports and Exercise, 50(8), 1570-1578. https://doi.org/10.1249/MSS.0000000000001596Guest, N. S., et al. (2021). International society of sports nutrition position stand: caffeine and exercise performance. Journal of the International Society of Sports Nutrition, 18(1). https://doi.org/10.1186/s12970-020-00383-4Southward, K., et al. (2018). The effect of caffeine ingestion on endurance performance: A systematic review and meta-analysis. Sports Medicine, 48(8), 1913-1931. https://doi.org/10.1007/s40279-018-0935-1Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 27 : Inside Your Veins: Are Glucose Monitors (CGM) the Ultimate Endurance Cheat Code? 🩸💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The transition of Continuous Glucose Monitoring (CGM) from a clinical diabetes tool to an endurance "fuel gauge" promises to demystify metabolic flux in real-time; however, the science reveals a complex gap between interstitial fluid readings and actual blood glucose. You must navigate the "compartmental lag time" of 5 to 15 minutes and the "interstitial inversion" during high-intensity efforts where sensor data may flatline while blood glucose actually spikes due to catecholamine-driven glycogenolysis. Training optimization relies on identifying your unique "glucotype" rather than following a universal Glycemic Index; elite athletes use these sensors to find their individualized fueling threshold—often targeting 90–120g of carbohydrates per hour—while monitoring for signs of mitochondrial impairment and overtraining. Beware of "orthorexia" and false readings caused by heat, Vitamin C, or "compression lows" during sleep; the data on your watch is often a "post-mortem" of your state 10 minutes ago rather than a live stream. The disqualification of Kristen Faulkner at the 2023 Strade Bianche highlights the growing tension between data-driven performance and the "human element" of racing.Keywords: cgm, metabolic flux, glycemic variability, glucotypes, interstitial fluid, fueling strategy, endurance performance, glycogenolysis, overtraining, biohacking🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Flockhart, M., et al. (2021). Excessive exercise training causes mitochondrial functional impairment and decreases glucose tolerance in healthy volunteers. Cell Metabolism. https://doi.org/10.1016/j.cmet.2021.02.005Thomas, F., et al. (2016). Glycemic Profiles of Sub-Elite Athletes with Normal Glucose Tolerance. Journal of Diabetes Science and Technology. https://doi.org/10.1177/1932296816648344Zeevi, D., et al. (2015). Personalized Nutrition by Prediction of Glycemic Responses. Cell. https://doi.org/10.1016/j.cell.2015.11.001Oliver, N. S., et al. (2024). Accuracy of continuous glucose monitoring during exercise. Journal of Applied Physiology.Rodriguez, J. A., et al. (2024). Continuous glucose monitoring for people without diabetes. Diabetes Technology & Therapeutics. https://doi.org/10.1089/dia.2024.0152Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 26 : Swimming: The Science of Speed & Hydrodynamics 🏊💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Humans are biomechanically ill-suited for the water, achieving a meager 5–8% mechanical efficiency compared to the 80% of aquatic mammals. Speed is a complex optimization problem where drag forces dominate lift (Newton over Bernoulli); research confirms that at sprint speeds, propulsion is 84% drag-based, requiring you to use your arm as a paddle—not a wing—and maintain a specific finger spread of 10–12 degrees to create a viscous shield. Abandon "garbage yardage" in favor of Ultra-Short Race-Pace Training (USRPT), such as sets of 20 x 25m at strict race target time with short rest intervals (15–20s) to replenish the ATP-PC system without reaching lactate failure; supplement this with dryland resistance training to improve stroke rate. Address the "big three" technical flaws—dropped elbows, crossover entry, and lifting the head—to minimize active drag, a principle critical whether you are sprinting or managing the physiological after-drop like ice swimmer Lewis Pugh.Keywords: swimming, hydrodynamics, usrpt, biomechanics, drag, physiology, lactate, technique, propulsion, training🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Jin, Y., et al. (2024). The methodology of resistance training is crucial for improving short-medium distance front crawl performance in competitive swimmers. Frontiers in Physiology. https://doi.org/10.3389/fphys.2024.1406518Marinho, D. A., et al. (2010). Swimming Propulsion Forces Are Enhanced by a Small Finger Spread. Journal of Applied Biomechanics.Rushall, B. S., et al. (1994). Forces in swimming: Current status. Swimming Science Journal.Schleihauf, R. E. (1979). Swimming propulsion: A hydrodynamic analysis. American Swimming Coaches Association World Clinic.Toussaint, H. M. (1990). Differences in propelling efficiency between competitive and triathlon swimmers. Medicine and Science in Sports and Exercise.Williamson, D., et al. (2020). Comparison of Ultra-Short Race Pace and High-Intensity Interval Training in Age Group Competitive Swimmers. Frontiers in Physiology.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 25 [CODE #2] Cycling Transformed: The Science of Speed 🚴💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Professional cycling has shifted from the "steak and wine" survivalism of the Merckx era to the metabolic precision of the Pogačar generation, driven by a transition from mythology to metrics. This episode decodes the "Three Pillars" of WorldTour performance—Structure, Strength, and Nutrition—that now dictate elite training. We explore the physiological mechanism of Polarized training (80/20), which prioritizes low-intensity volume (Zone 1) to maximize mitochondrial biogenesis via the CaMK pathway while avoiding the autonomic burnout of the "moderate" Zone 2 black hole; however, we also examine why time-crunched amateurs might benefit more from a Pyramidal or Sweet Spot approach to build aerobic density. The discussion moves to the Rønnestad protocol for heavy strength training, proving that low-repetition (4–10 RM), high-velocity lifts enhance neural recruitment and cycling economy without detrimental hypertrophy. We then break down the nutritional revolution of 120g/hr carbohydrate intake, utilizing SGLT1 and GLUT5 transporter saturation to minimize muscle damage and preserve glycogen for the critical fourth dimension of performance: Durability. From Mat Hayman’s Zwift-only Paris-Roubaix victory to heat training as a "poor man's altitude," learn how to steal the pros' secrets to build an engine that refuses to fade.Keywords: polarized training, mitochondrial biogenesis, heavy strength training, cycling economy, 120g/hr carbs, durability, rønnestad protocol, heat training, zone 2, sglt1 transporter.🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Seiler, S., & Tønnessen, E. (2009). Intervals, Thresholds, and Long Slow Distance: the Role of Intensity and Duration in Endurance Training. Sportscience.Stöggl, T., & Sperlich, B. (2014). The training intensity distribution among well-trained and elite endurance athletes. Frontiers in Physiology. https://doi.org/10.3389/fphys.2014.00033Rønnestad, B. R., et al. (2015). Strength training improves performance and pedaling characteristics in elite cyclists. Scandinavian Journal of Medicine & Science in Sports. https://doi.org/10.1111/sms.12189Viribay, A., et al. (2020). Effects of 120 g/h of Carbohydrates Intake during a Mountain Marathon on Exercise-Induced Muscle Damage in Elite Runners. Nutrients, 12(5), 1367. https://doi.org/10.3390/nu12051367Maunder, E., & Van Erp, T. (2021). Durability as an independent parameter of endurance performance in cycling. Sports Medicine.Jeukendrup, A. E. (2014). A step towards personalized sports nutrition: carbohydrate intake during exercise. Sports Medicine, 44(1), 25–33. https://doi.org/10.1007/s40279-014-0148-zVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 24 [CODE #1] The 80/20 Secret Train SLOWER to Race FASTER Than Ever 📉💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Stop believing that exhaustion is the only metric of success; elite athletes like Eliud Kipchoge spend 80% of their training volume shuffling at paces significantly slower than race speed to build a metabolic engine that recreational runners destroy in the "Grey Zone." This episode dismantles the "No Pain, No Gain" myth by exploring the opposing cellular signaling pathways: the volume-dependent calcium-calmodulin trigger for mitochondrial biogenesis and the high-stress AMPK pathway. You will learn why staying below the first lactate threshold (LT1 < 2.0 mmol/L) maximizes MCT-1 transporters to clear fatigue, while the "Black Hole" of moderate intensity leads to autonomic stagnation. We translate the landmark work of Dr. Stephen Seiler into a practical blueprint, polarizing your week into strict Zone 1 volume and Zone 3 intensity to replicate the +11.7% VO₂peak gains seen in controlled trials; look at Mark Allen, who capped his heart rate at 155 bpm to transform from an anaerobic choker into a six-time Ironman champion.Keywords: polarized training, zone 2, stephen seiler, lactate threshold, vo₂max, mitochondrial biogenesis, 80/20 rule, mark allen🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Seiler, S., & Kjerland, G. Ø. (2006). Quantifying training intensity distribution in elite endurance athletes: is there evidence for an "optimal" distribution? Scandinavian Journal of Medicine & Science in Sports.Stöggl, T., & Sperlich, B. (2014). Polarized training has greater impact on key endurance variables than threshold, high intensity, or high volume training. Frontiers in Physiology.Rosenblat, M. A., Perrotta, A. S., & Vicenzino, B. (2019). Polarized vs. Threshold Training Intensity Distribution on Endurance Sport Performance: A Systematic Review and Meta-Analysis. Journal of Strength and Conditioning Research.Burnley, M., et al. (2022). Polarized Training is Not Optimal for Endurance Athletes.Bakken, M. (2022). The Norwegian model of lactate threshold training.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 23 : Are Your Vitamins KILLING Your Gains? The Antioxidant Trap Explained 💊💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: For decades, the fitness industry sold the myth that "more is better," but the Antioxidant Paradox reveals that your post-workout multivitamin might be chemically castrating your hard-earned adaptations. Emerging research establishes that Reactive Oxygen Species (ROS) are not merely toxins but essential "mitohormetic" signals that trigger mitochondrial biogenesis (via PGC-1$\alpha$) and strength gains (via p70S6K); high-dose antioxidants like Vitamin C (1000 mg) and E indiscriminately mute these signals, effectively blocking insulin sensitivity improvements and slashing endurance gains by up to 160% in animal models. The rigorous physiological data from Ristow and Gomez-Cabrera dictates a "Food First" protocol to modulate rather than silence stress, requiring athletes to strictly avoid antioxidant supplementation in the 2–4 hour window pre- and post-training. While structural hypertrophy may persist despite blunted signaling, functional strength and aerobic efficiency are compromised, meaning elite performance requires periodization—"Train Low" to maximize adaptation during base phases and "Compete High" only during multi-day stage races or altitude camps where survival outweighs growth.Keywords: antioxidant trap, mitohormesis, reactive oxygen species, pgc-1α, vitamin c, hypertrophy, insulin sensitivity, periodization, food first, nrf2🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Ristow, M., et al. (2009). Antioxidants prevent health-promoting effects of physical exercise in humans. Proceedings of the National Academy of Sciences, 106(21), 8665-8670. https://doi.org/10.1073/pnas.0903485106Gomez-Cabrera, M. C., et al. (2008). Oral administration of vitamin C decreases muscle mitochondrial biogenesis and hampers training-induced adaptations in endurance performance. American Journal of Clinical Nutrition, 87(1), 142-149. https://pubmed.ncbi.nlm.nih.gov/18175748/Paulsen, G., et al. (2014). Vitamin C and E supplementation alters protein signalling after a strength training session, but not muscle growth during 10 weeks of training. The Journal of Physiology, 592(24), 5391-5408. https://pubmed.ncbi.nlm.nih.gov/25384788/Klein, E. A., et al. (2011). Vitamin E and the risk of prostate cancer: the Selenium and Vitamin E Cancer Prevention Trial (SELECT). JAMA. https://ascopost.com/issues/april-15-2012/select-trial-update-vitamin-e-fails-to-prevent-prostate-cancer-in-healthy-men/Jeukendrup, A. E. (2017). Periodized Nutrition for Athletes. Sports Medicine, 47(Suppl 1), 51–63. https://pmc.ncbi.nlm.nih.gov/articles/PMC5371625/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 22 : Blueprint for 2026 ✨ : How to Analyze Your Past Season to Build Your Best Year Yet ✨💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: The demarcation between stagnation and breakthrough in 2026 is not determined by your first interval of January, but by the depth of your forensic audit now, as memory is an unreliable narrator that masks physiological reality behind the "soldier mindset" and euphoria of the finish line; you must rigorously analyze aerobic decoupling (Pw:HR) on long rides, where a drift >5% signals thermoregulatory stress and inefficient Type II fiber recruitment rather than true durability, and scrutinize your Power Duration Curve for discrepancies between sFTP and mFTP that indicate "zone confusion" where threshold work became glycolytic suprathreshold strain. Prioritize "resensitization" over continuous load, as a 2-4 week break resets hormonal sensitivity with only minor plasma volume loss, and implement heavy strength training (3-5 reps at >85% 1RM) to improve fractional utilization and economy as successfully demonstrated by Tadej Pogačar following his 2023 defeat; finally, overlay your injury timeline with the Acute:Chronic Workload Ratio (aim for 0.8–1.3) to identify systemic loading errors rather than bad luck.Keywords: physiological audit, aerobic decoupling, power duration curve, resensitization, strength training, acute chronic workload ratio, tadej pogačar, mftp vs sftp, durability.🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Casado, A., et al. (2022). Training Periodization, Methods, Intensity Distribution, and Volume in Highly Trained and Elite Distance Runners: A Systematic Review. International Journal of Sports Physiology and Performance.Maupin, D., et al. (2025). Acute to chronic workload ratio (ACWR) for predicting sports injury risk: a systematic review and meta-analysis. PMC.Balk, A. (2025). Cardiorespiratory and metabolic consequences of detraining in endurance athletes. PMC.Vikmoen, O., et al. (2025). Strength Training Improves Exercise Economy in Triathletes During a Simulated Triathlon. ResearchGate.Mølmen, K. S., et al. (2025). Block periodization of endurance training - a systematic review and meta-analysis. PMC.CyclingUpToDate. (2025). Is this what Tadej Pogacar improved the most in 2024: "When I am fatigued, I don't lose so much of my explosiveness anymore".Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 21 : Holiday Survival Guide: How to Train Smart & Enjoy the Feasts 🎄💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: The holiday paradox—balancing monastic discipline with festive hedonism—often leads to guilt or fitness loss, but physiology offers a smarter path. We deconstruct the desynchronized kinetics of detraining, where plasma volume and mitochondrial enzymes like Citrate Synthase decay rapidly (-28% in 10 days) while structural adaptations like capillary density remain robust. Metabolically, acute high-fat overfeeding can reduce insulin sensitivity by 28% in a single day, and alcohol ingestion blunts muscle protein synthesis by 24% via mTOR inhibition. To navigate this, apply the Minimum Effective Training Dose (METD): prioritize frequency over duration with short (30–45 min) high-intensity sessions every 48–72 hours to "cauterize" hemodynamic loss. Utilize the "Reynolds Walk" (10 mins post-meal) to activate non-insulin-dependent glucose uptake, and follow the lead of elite teams like Visma | Lease a Bike by pivoting to high protein on rest days.Keywords: detraining kinetics, plasma volume, minimum effective training dose, metabolic flexibility, reynolds walk, muscle protein synthesis, insulin sensitivity🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Mujika, I., & Padilla, S. (2000). Cardiorespiratory and metabolic consequences of detraining in endurance athletes. Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC10853933/Spiering, B. A., et al. (2021). Maintaining Physical Performance: The Minimal Dose of Exercise Needed to Preserve Endurance and Strength Over Time. Journal of Strength and Conditioning Research. https://pubmed.ncbi.nlm.nih.gov/33629972/Parr, E. B., et al. (2014). Alcohol ingestion impairs maximal post-exercise rates of myofibrillar protein synthesis following a single bout of concurrent training. PLOS ONE. https://pubmed.ncbi.nlm.nih.gov/24533082/Reynolds, A. N., et al. (2016). Advice to walk after meals is more effective for lowering postprandial glycaemia in type 2 diabetes mellitus than advice that does not specify timing. Diabetologia. https://pubmed.ncbi.nlm.nih.gov/27747394/Parry, S. A., et al. (2017). A Single Day of Excessive Dietary Fat Intake Reduces Whole-Body Insulin Sensitivity. Nutrients. https://pmc.ncbi.nlm.nih.gov/articles/PMC5579612/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 20 : Electrolytes 2.0: Are You Getting More Than Just Sodium? 🧂💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary:Forget the marketing hype around "full-spectrum" electrolytes; the science of endurance performance doubles down on sodium precision while debunking the need for acute potassium or magnesium replacement. Sweat is a filtrate of blood plasma where sodium dominates ($230–2000+ mg/L$), whereas potassium and magnesium losses are negligible compared to your body's vast intracellular stores. Sodium is not just for fluid balance; it acts as the essential key for the SGLT1 transporter to unlock carbohydrate absorption, allowing elite fueling rates of $90–120g/hr$ without GI distress. The popular belief that mineral depletion causes cramping is largely a myth; modern evidence points to the "Altered Neuromuscular Control" theory, where fatigue disrupts motor neuron inhibition, treated best by pacing, stretching, or TRP agonists like pickle juice. For advanced buffering, sodium bicarbonate offers a dual benefit of neutralizing metabolic acidosis and expanding plasma volume, provided you manage the massive sodium load ($5000+ mg$). Elite protocols from Kristian Blummenfelt to Visma | Lease a Bike prioritize measuring individual sweat sodium concentration to tailor intake, proving that salt, managed with scientific precision, remains the undisputed king of hydration.Keywords:electrolytes, sodium, sglt1, neuromuscular fatigue, cramping, bicarbonate, hydration, sweat rate, endurance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Baker, L. B., et al. (2018). Normative data on regional sweat-sodium concentrations of professional male team-sport athletes. Journal of the International Society of Sports Nutrition. https://pmc.ncbi.nlm.nih.gov/articles/PMC5661918/Hew-Butler, T., et al. (2017). Exercise-Associated Hyponatremia: 2017 Update. Frontiers in Medicine. https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2017.00021/fullGarrison, S. R., et al. (2020). Magnesium for skeletal muscle cramps. Cochrane Database of Systematic Reviews. https://pubmed.ncbi.nlm.nih.gov/32956536/Schwellnus, M. P., et al. (2009). Exercise-Associated Muscle Cramp—Doubts About the Cause. Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC5857054/Gough, L. A., et al. (2021). Enhancing exercise performance and recovery through sodium bicarbonate supplementation. Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC11519211/Hofman, D. L., et al. (2016). Sweating Rate and Sweat Sodium Concentration in Athletes. Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC5371639/ Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 19 : Heart Rate Mistake: Why 90% of Amateurs Train WRONG 📉💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Why does "training harder" often lead to stagnation while elite athletes slow down to get faster? The "Black Hole" of training (Zone 3) creates a metabolic mismatch where reliance on glycolysis and Type II fiber recruitment generates excessive reactive oxygen species (ROS) and autonomic fatigue without stimulating the specific mitochondrial adaptations of true endurance. Scientific consensus confirms that performance relies on Zone 2 (below VT1) to maximize MCT1 transporter proliferation and fat oxidation, effectively decoupling the sensation of work from the biology of adaptation. Stop using the invalid "220 minus age" formula ; instead, validate your aerobic ceiling with the "Talk Test" (comfortable speech) or a Heart Rate Drift Test (keeping decoupling below 5% over 60 minutes). For recovery, discipline is key: stay strictly below 50% of your FTP or 70% of HRmax to avoid parasympathetic stress , much like Mathieu van der Poel, who rides at half his capacity on easy days to build a "Mitochondrial Ferrari" engine.Keywords: zone 2, black hole, heart rate drift, vt1, talk test, mitochondria, polarized training, recovery, ftp, ros🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Seiler, S. (2010). What is best practice for training intensity and duration distribution in endurance athletes? International Journal of Sports Physiology and Performance, 5(3), 276-291. https://journals.humankinetics.com/view/journals/ijspp/5/3/article-p276.xmlSeiler, S., Haugen, O., & Kuffel, E. (2007). Autonomic recovery after exercise in trained athletes: intensity and duration effects. Medicine and Science in Sports and Exercise, 39(8), 1366-1373. http://instituteofmotion.com/wp-content/uploads/2021/01/Autonomic-Recovery-after-Exercise-in-Trained-Athletes-intensity-and-duration-effects-S-Seiler.pdfTanaka, H., Monahan, K. D., & Seals, D. R. (2001). Age-predicted maximal heart rate revisited. Journal of the American College of Cardiology, 37(1), 153-156. https://pubmed.ncbi.nlm.nih.gov/11153730/San-Millán, I., & Brooks, G. A. (2018). Assessment of Metabolic Flexibility by Means of Measuring Blood Lactate, Fat, and Carbohydrate Oxidation Responses to Exercise in Professional Endurance Athletes and Less-Fit Individuals. Sports Medicine, 48(2), 467-479.Hydren, J. R., & Cohen, B. S. (2015). Current scientific evidence for a polarized cardiovascular endurance training model. Journal of Strength and Conditioning Research, 29(12), 3523-3530.Maunder, E., Seiler, S., & Mildenhall, M. J. (2021). The Importance of 'Durability' in the Physiological Profiling of Endurance Athletes. Sports Medicine, 51(8), 1619-1628.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 18 : [Science vs. Myth #9] The "Legal Doping" Trap: Is Beetroot Juice Just Expensive Hype? 🫜💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Marketing promises a staggering 16% boost in time-to-exhaustion, but the scientific reality reveals a much tighter margin where real-world time-trial gains shrink to roughly 1% or an average of 4.6 watts. The mechanism isn't about adding fuel, but rather a "firmware update" for your mitochondria via the nitrate-nitrite-nitric oxide pathway, which reduces the oxygen cost of ATP production specifically when muscle tissues are hypoxic and acidic. To unlock this efficiency, you need a standardized dose of 400–500 mg (5–8 mmol) consumed 2 to 3 hours pre-exercise, or a 3–7 day chronic loading phase, while strictly avoiding antibacterial mouthwash that kills the oral bacteria essential for converting nitrate to nitrite. However, a cruel paradox exists where elites with a VO₂max over 65 ml/kg/min often see no statistically significant benefit because their training has already maximized endogenous nitric oxide production, leaving recreational athletes as the primary responders. Yet, even Jonas Vingegaard’s team used standardized nitrate shots during his 2023 Tour de France victory, proving that at the absolute pinnacle, the goal is the relentless aggregation of every possible marginal gain.Keywords: dietary nitrate, nitric oxide, mitochondrial efficiency, vo₂max, beetroot juice, oxygen economy, endurance performance, time trial, marginal gains, elite athlete paradox🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Poon, E. T. C., Chung, J. W. Y., Lee, K. K. H., Wong, S. H. S., & Huang, W. Y. J. (2023). Dietary Nitrate Supplementation and Exercise Performance: An Umbrella Review of 20 Published Systematic Reviews with Meta-analyses. Sports Medicine, 53(10), 1913-1936. https://doi.org/10.1007/s40279-023-01891-zSenefeld, J. W., Wiggins, C. C., Regimbal, R. J., Dominelli, P. B., Baker, S. E., & Joyner, M. J. (2020). Ergogenic effect of nitrate supplementation: a systematic review and meta-analysis. Medicine & Science in Sports & Exercise, 52(10), 2250-2261. https://doi.org/10.1249/MSS.0000000000002362Gao, C., Gupta, S., Adli, T., Hou, W., Cools, F., Schoutteten, M. K., Van Proeyen, K., Eynde, E. V., Liddle, L., & Vandekerckhove, K. (2021). The effects of dietary nitrate supplementation on endurance exercise performance and cardiorespiratory measures in healthy adults: a systematic review and meta-analysis. Journal of the International Society of Sports Nutrition, 18(1), 55. https://doi.org/10.1186/s12970-021-00451-8McMahon, N. F., Leveritt, M. D., & Pavey, T. G. (2017). The effect of dietary nitrate supplementation on endurance exercise performance in healthy adults: a systematic review and meta-analysis. Sports Medicine, 47(4), 735-756. https://doi.org/10.1007/s40279-016-0617-7Maughan, R. J., Burke, L. M., Dvorak, J., Larson-Meyer, D. E., Peeling, P., Phillips, S. M., ... Engebretsen, L. (2018). IOC consensus statement: dietary supplements and the high-performance athlete. British Journal of Sports Medicine, 52(7), 439-455. https://doi.org/10.1136/bjsm-2018-099027Jones, A. M. (2022). Dietary nitrate and exercise performance: New strings to the beetroot bow. Gatorade Sports Science Institute SSE #228. https://www.gssiweb.org/sports-science-exchange/article/dietary-nitrate-and-exercise-performance-new-strings-to-the-beetroot-bowVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 17 : Anemia: The Silent Performance Killer in Athletes (And How to Beat It) 🩸💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Up to 35% of female athletes and 11% of males suffer from a deficiency that acts as an invisible anchor, potentially cutting performance by 2-20% even without clinical anemia. It is not just about oxygen transport via hemoglobin; iron is the ignition switch for your mitochondria to produce ATP, meaning low ferritin impairs cellular energy even if oxygen delivery is normal. The real enemy is hepcidin, a hormone triggered by inflammation (IL-6) that peaks 3-6 hours post-exercise, locking the cellular doors to iron absorption precisely when you try to recover. Stop wasting supplements during this "hepcidin block"; time your intake for morning rest periods or at least 6-8 hours post-session, aiming for a ferritin target of >40-50 ng/mL rather than the generic laboratory "normal." Adopt alternate-day dosing or pair 100 mg of elemental iron with Vitamin C to bypass the blockade and boost non-heme absorption by up to 67%; Paula Radcliffe’s 2004 Athens collapse illustrates how this physiological failure can seize the engine under heat and stress.Keywords: iron deficiency, anemia, hepcidin, endurance, hemoglobin, ferritin, vo₂max, mitochondria, red-s, running economy🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Burden, R. J., Morton, K., Richards, T., Whyte, G. P., & Pedlar, C. R. (2015). Is iron treatment beneficial in, iron-deficient but non-anemic (IDNA) endurance athletes? A systematic review and meta-analysis. British Journal of Sports Medicine, 49(21), 1389-1397. https://doi.org/10.1136/bjsports-2014-093624Clénin, G., Cordes, M., Huber, A., Schumacher, Y. O., Noack, P., Scales, J., & Kriemler, S. (2015). Iron deficiency in sports - definition, influence on performance and therapy. Swiss Medical Weekly, 145, w14196. https://doi.org/10.4414/smw.2015.14196McKay, A. K., Peeling, P., Pyne, D. B., Tee, N., & Leckey, J. J. (2024). The effects of iron deficiency and iron supplementation on sports performance in high-level female athletes: A systematic review. Journal of Science and Medicine in Sport, 27(7), 405-415. https://doi.org/10.1016/j.jsams.2024.03.003Peeling, P., Sim, M., Badenhorst, C. E., Dawson, B., Govus, A. D., Abbiss, C. R.,... & Swinkels, D. W. (2019). The effects of exercise on hepcidin: a systematic review and meta-analysis. Sports Medicine, 49(5), 717-727. https://doi.org/10.1007/s40279-019-01108-2Sim, M., Garvican-Lewis, L. A., Cox, G. R., Govus, A., McKay, A. K., Stellingwerff, T., & Peeling, P. (2019). Iron considerations for the athlete: a narrative review. European Journal of Applied Physiology, 119(7), 1463-1478. https://doi.org/10.1007/s00421-019-04157-yWoods, A., Garvican-Lewis, L. A., Saunders, P. U., Lovell, G., & Peeling, P. (2024). Effect of intravenous iron therapy on exercise performance, fatigue scores and mood states in iron-deficient recreationally active females of reproductive age: a double-blind, randomised control trial (IRONWOMAN Trial). British Journal of Sports Medicine, 59(13), 921-928. http://dx.doi.org/10.1136/bjsm-2023-107769 Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 16 : [Science vs. Myth #8] Is BCAA The Biggest SCAM in Sports Nutrition? 💊💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: The supplement industry markets BCAAs as an anabolic necessity, but high-level physiology reveals a "bait-and-switch" where muscle growth promises clash with biochemical reality. While the amino acid leucine potently activates the mTORC1 pathway to signal growth, the absence of the other six essential amino acids creates an "empty construction site" where net muscle protein synthesis is impossible. For you, the endurance athlete already consuming adequate protein (1.4–2.0 g/kg), isolated BCAAs are largely a redundant placebo; however, they possess a validated niche utility for reducing delayed onset muscle soreness (DOMS) and attenuating creatine kinase markers. To leverage this, utilize a prophylactic loading protocol: consume 10–20 g/day (or 200 mg/kg) in a 2:1:1 ratio, split pre- and post-exercise, starting 7–10 days before high-stress blocks like training camps. While specific profiles like plant-based athletes or those in extreme caloric deficits may find marginal gains, the hierarchy of needs remains absolute; as evidenced by Tadej Pogačar's collapse on the Col de la Loze, performance is dictated by carbohydrate availability and gut integrity, not by isolated amino acid powders.Keywords: bcaa, mtorc1, muscle protein synthesis, doms, recovery, leucine, endurance nutrition, central fatigue, protein intake, supplements🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Doma, K., Singh, U., Boullosa, D., & Connor, J. (2021). The effect of branched-chain amino acid on muscle damage and performance recovery following strenuous exercise: a systematic review and meta-analysis. Applied Physiology, Nutrition, and Metabolism, 46(11), 1303-1313. https://doi.org/10.1139/apnm-2021-0110Hormoznejad, R., Zare Javid, A., & Mansoori, A. (2019). Effect of BCAA supplementation on central fatigue, energy metabolism substrate and muscle damage to the exercise: a systematic review with meta-analysis. Sport Sciences for Health, 15(2), 265-279. https://doi.org/10.1007/s11332-019-00542-4Martin-Rincon, M., et al. (2022). Oral Branched-Chain Amino Acids Supplementation in Athletes: A Systematic Review. Nutrients, 14(19), 4002. https://doi.org/10.3390/nu14194002Plotkin, D. L., et al. (2023). The effects of branched-chain amino acids on muscle protein synthesis, muscle protein breakdown and associated molecular signalling responses in humans: An update. Nutrition Research Reviews, 37(2), 1-36. https://doi.org/10.1017/S095442242300018XSalem, A., et al. (2024). Attenuating Muscle Damage Biomarkers and Muscle Soreness After an Exercise-Induced Muscle Damage with Branched-Chain Amino Acid (BCAA) Supplementation: A Systematic Review and Meta-analysis with Meta-regression. Sports Medicine - Open, 10(1), 47. https://doi.org/10.1186/s40798-024-00713-3Wolfe, R. R. (2017). Branched-chain amino acids and muscle protein synthesis in humans: myth or reality? Journal of the International Society of Sports Nutrition, 14, 30. https://doi.org/10.1186/s12970-017-0184-9Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 15 : Zone Warfare: FTP vs. VMA. Are You Training in the RIGHT Zone? 🧬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Stop chasing a "magic number" that may not represent your physiology and start building a resilient engine by understanding the distinct roles of your metabolic threshold and aerobic ceiling. Functional Threshold Power (FTP) is not simply your "hour power," but the physiological steady state where lactate production matches clearance, heavily reliant on MCT transporter density and mitochondrial efficiency. Conversely, Maximal Aerobic Velocity (VMA) targets the severe domain to maximize cardiac output and trigger rapid mitochondrial biogenesis via AMPK signaling, raising the absolute roof of your performance. To optimize training, diagnose your profile with a 3-minute and 30-minute field test, then execute targeted blocks: extend your TTE with threshold intervals like 4x8 minutes at 98-103% FTP, or raise your VO₂max with 5x4 minute repeats at 110-120% FTP. Remember that VMA values are highly protocol-dependent, so consistency in testing is vital for accurate prescription. Real-world dominance requires mastering both systems, much like Tadej Pogačar, who combines a massive threshold for long climbs with explosive VMA-level power for decisive attacks.Keywords: ftp, vma, vo₂max, lactate threshold, polarized training, mitochondrial biogenesis, anaerobic speed reserve, cycling power, endurance physiology🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Borszcz, F. K., Tramontin, A. F., & Costa, V. P. (2018). Is the functional threshold power interchangeable with the maximal lactate steady state in trained cyclists? International Journal of Sports Medicine, 39(10), 737-742. https://doi.org/10.1055/a-0645-9333Burnley, M., & Jones, A. M. (2018). Power-duration relationship: Physiology, fatigue, and the limits of human performance. European Journal of Sport Science, 18(1), 1-12. https://doi.org/10.1080/17461391.2016.1249524Poole, D. C., & Jones, A. M. (2017). Measurement of the maximum oxygen uptake Vo2max: Vo2peak is no longer acceptable. Journal of Applied Physiology, 122(4), 997-1002. https://doi.org/10.1152/japplphysiol.01063.2016Rosenblat, M. A., Perrotta, A. S., & Vicenzino, B. (2019). Polarized vs. threshold training intensity distribution on endurance sport performance: A systematic review and meta-analysis of randomized controlled trials. The Journal of Strength & Conditioning Research, 33(12), 3491-3500. https://doi.org/10.1519/JSC.0000000000003359Seiler, S. (2010). What is best practice for training intensity and duration distribution in endurance athletes? International Journal of Sports Physiology and Performance, 5(3), 276-291. https://doi.org/10.1123/ijspp.5.3.276Valenzuela, P. L., Muriel, X., Torres-Peralta, R., et al. (2023). Functional threshold power is not a valid marker of the maximal metabolic steady state. Journal of Sports Sciences, 41(10), 941-949. https://doi.org/10.1080/02640414.2023.2176045Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 14 : [Science vs. Myth #7] Creatine for Endurance: The Untapped Secret for a Stronger Finish ⚡️💬 Got a question or feedback? Write us at: [email protected] ☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Creatine isn't just for bodybuilders. For endurance athletes, it’s the secret to winning the race in the final moments—not by changing your steady-state pace, but by supercharging the decisive surges, climbs, and finishing sprints. This episode breaks down the real science: creatine supplementation saturates your muscles with phosphocreatine (PCr), fueling the anaerobic "afterburner" system (ATP-PCr) required for 10-15 second explosive bursts. It also enhances muscle glycogen storage (your primary endurance fuel) and acts as an intracellular buffer, helping to delay metabolic fatigue during high-intensity efforts. We translate this into action: use a "Training Block Booster" protocol (3−5 g/day) during intense periods of VO₂max intervals or hill sprints to improve training quality and accelerate recovery. For a peak "A" race, start a loading phase (0.3 g/kg/day) 4 weeks before the event (never race week) to maximize adaptations. We also tackle the "myths": the 1-2 kg of weight gain is intracellular water, not fat. We explain the VO₂max paradox (why a tiny drop in max oxygen uptake might not matter if your sustainable threshold improves ) and confirm that creatine does not cause cramping or kidney damage in healthy individuals. This is the physiology behind Tadej Pogačar's explosive sprint to win a Tour de France mountain stage after hours of racing.Keywords: creatine, endurance, cycling, running, phosphocreatine, vo₂max, ergogenic aid, supplementation, recovery, sprints🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references : Forbes, S. C., Candow, D. G., Neto, J. H. F., Kennedy, M. D., Forbes, J. L., Machado, M.,... & Antonio, J. (2023). Creatine supplementation and endurance performance: surges and sprints to win the race. Journal of the International Society of Sports Nutrition, 20(1), 2204071. https://doi.org/10.1080/15502783.2023.2204071Gras, L. L., Lanhers, C., et al. (2022). The effect of creatine supplementation on VO2max: a systematic review and meta-analysis of randomized controlled trials. Critical Reviews in Food Science and Nutrition, 63(28), 9694-9707. https://doi.org/10.1080/10408398.2022.2083384Kreider, R. B., Kalman, D. S., Antonio, J., Ziegenfuss, T. N., Wildman, R., Collins, R.,... & Lopez, H. L. (2017). International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition, 14(1), 18. https://doi.org/10.1186/s12970-017-0173-zKreider, R. B., Jäger, R., & Purpura, M. (2022). Bioavailability, Efficacy, Safety, and Regulatory Status of Creatine and Related Compounds: A Critical Review. Nutrients, 14(5), 1035. https://doi.org/10.3390/nu14051035Lopez, R. M., Casa, D. J., McDermott, B. P., Ganio, M. S., Armstrong, L. E., & Maresh, C. M. (2009). Does creatine supplementation hinder exercise heat tolerance or hydration status? A systematic review with meta-analyses. Journal of Athletic Training, 44(2), 215-223. https://doi.org/10.4085/1062-6050-44.2.215Mielgo-Ayuso, J., Calleja-Gonzalez, J., Marqués-Jiménez, D., Caballero-García, A., Córdova, A., & Fernández-Lázaro, D. (2023). Effects of Creatine Monohydrate Supplementation on Endurance Performance in Trained Populations: A Systematic Review and Meta-Analysis. Nutrients, 15(5), 1098. https://doi.org/10.3390/nu15051098Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 13 : VO₂max Obsession: The Hidden Truth About Endurance Potential 🎯💬 Got a question or feedback? Write us at: [email protected] ☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Why do some athletes with huge VO₂max scores get beaten by those with "smaller engines"? This episode deconstructs the myth of the single metric , revealing that performance is a dynamic triad: VO₂max (the aerobic ceiling) , Lactate Threshold (the percentage of that ceiling you can sustain) , and Exercise Economy (your fuel efficiency). We explore modern physiology, where lactate is a critical fuel, not a waste product , and improving your threshold is about enhancing lactate clearance via mitochondrial density and MCT transporter proteins. We provide validated, actionable protocols: boost your ceiling (VO₂max) with 3-5 minute HIIT intervals paired with crucial long, low-intensity (≤40%) recoveries of 2+ minutes ; master your threshold (LT) with "comfortably hard" tempo sessions (20-40 min) or threshold intervals (e.g., 3x15 min) ; and build "free speed" (Economy) using heavy (≥80% 1RM) strength training and plyometrics —meta-analyses show low-load circuits are not effective for this. The balance shifts: VO₂max is key for novices , but for trained athletes, economy and threshold are the primary drivers of new personal bests. We illustrate this with Paula Radcliffe, whose VO₂max remained stable for 11 years (~70) while her running economy improved by an astounding 15% , unlocking her dominant world record.Keywords: vo₂max, lactate threshold, exercise economy, hiit, strength training, endurance, running, cycling, physiology, performance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references : Balsalobre-Fernández, C., Santos-Concejero, J., & Grivas, G. V. (2016). Effects of strength training on running economy in highly trained runners: A systematic review with meta-analysis of controlled trials. Journal of Strength and Conditioning Research, 30(8), 2361-2368. https://doi.org/10.1519/JSC.0000000000001316Casado, A., Foster, C., Bakken, M., & Tjelta, L. I. (2023). Does Lactate-Guided Threshold Interval Training within a High-Volume Low-Intensity Approach Represent the "Next Step" in the Evolution of Endurance Training? International Journal of Environmental Research and Public Health, 20(5), 3782. https://doi.org/10.3390/ijerph20053782Deng, N., Li, F., Zhang, Y., & Zhang, M. (2023). Effects of high-intensity interval training versus conventional training on maximal oxygen uptake in elite athletes: A meta-analysis. PLOS ONE, 18(6), e0280897. https://doi.org/10.1371/journal.pone.0280897Milanović, Z., Sporiš, G., & Weston, M. (2015). Effectiveness of high-intensity interval training (HIT) and continuous endurance training for VO2max improvements: A systematic review and meta-analysis of controlled trials. Sports Medicine, 45(10), 1469-1481. https://doi.org/10.1007/s40279-015-0365-0Ramírez-Campillo, R., Andrade, D. C., García-Pinillos, F., Negra, Y., Boullosa, D., & Izquierdo, M. (2024). Effects of different strength training methods on running economy in middle- and long-distance runners: A systematic review with meta-analysis. Applied Sciences, 14(19), 8976. https://doi.org/10.3390/app14198976Subbarayalu, A. V. (2024). Lactate threshold training to improve long-distance running performance: A narrative review. Montenegrin Journal of Sports Science and Medicine, 13(1). https://doi.org/10.26773/mjssm.240303Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 12 : [Science vs. Myth #6] The Recovery Beer: Performance Hack or Health Hazard? 🏋️💬 Got a question or feedback? Write us at: [email protected] ☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: The post-race beer is an athletic tradition, but it creates an illusion of recovery you may not feel sorer, yet you are silently sabotaging long-term adaptation. Alcohol's primary harm is a direct assault on muscle protein synthesis MPS. A high dose more than 1 g/kg severely suppresses the mTOR signaling pathway, reducing MPS by 24-37% even when co-ingested with protein. It also disrupts the hormonal balance by increasing catabolic cortisol and decreasing anabolic testosterone; hinders rehydration if ABV is more than 4%; and profoundly disrupts restorative sleep architecture, suppressing critical REM sleep even at low doses. To protect your gains, prioritize the 3 R's within 30-60 minutes: 20-40g of protein Repair, 1.0-1.2 g/kg of carbs Refuel, and water/electrolytes Rehydrate. If you choose to drink, wait 2-4 hours after your recovery meal and strictly respect the relatively safe threshold of 0.5 g/kg body weight approx 2.5 standard 5% beers for a 70kg athlete. The behavioral factor is also key: alcohol can displace essential carb intake, sabotaging glycogen resynthesis. This is why elite pros at the Tour de France use optimized shakes, and triathletes increasingly choose non-alcoholic beers decoupling the social ritual from the physiological poison.Keywords: alcohol, recovery, muscle protein synthesis, mtor, glycogen, hydration, sleep, cortisol, endurance, beer🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references : Burke, L. M., van Loon, L. J. C., Hawley, J. A., & Wong, S. H. S. (2017). Post-exercise muscle glycogen resynthesis in humans. Journal of Applied Physiology, 122(5), 1055-1067. https://doi.org/10.1152/japplphysiol.00860.2016 Desbrow, B., Cecchin, D., Jones, A., & Irwin, C. (2021). Got beer? A systematic review of beer and exercise. International Journal of Sport Nutrition and Exercise Metabolism, 31(5), 438-450. https://doi.org/10.1123/ijsnem.2021-0064 Gardiner, C., Weakley, J., Burke, L. M., Roach, G. D., Sargent, C., Maniar, N., Huynh, M., Miller, D. J., Townshend, A., & Halson, S. L. (2025). The effect of alcohol on subsequent sleep in healthy adults: A systematic review and meta-analysis. Sleep Medicine Reviews, 80, 102030. https://doi.org/10.1016/j.smrv.2024.102030 Jiménez-Pavón, D., Cervantes-Borunda, M. S., Díaz, L. E., Marcos, A., & Castillo, M. J. (2015). Effects of a moderate intake of beer on markers of hydration after exercise in the heat: a crossover study. Journal of the International Society of Sports Nutrition, 12(1), 26. https://doi.org/10.1186/s12970-015-0088-5 Lakićević, N. (2019). The effects of alcohol consumption on recovery following resistance exercise: A systematic review. Journal of Functional Morphology and Kinesiology, 4(3), 41. https://doi.org/10.3390/jfmk4030041 Parr, E. B., Camera, D. M., Areta, J. L., Burke, L. M., Phillips, S. M., Hawley, J. A., & Coffey, V. G. (2014). Alcohol ingestion impairs maximal post-exercise rates of myofibrillar protein synthesis following a single bout of concurrent training. PLoS ONE, 9(2), e88384. https://doi.org/10.1371/journal.pone.0088384Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 11 : The Carb-Loading Blueprint: Never Hit The Wall Again ⛽💬 Got a question or feedback? Write us at: [email protected] ☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Stop fearing "the wall"—transform your race by turning endurance sport into a strategic eating contest. For events over 90 minutes, a meticulous carb-loading strategy is scientifically proven to improve performance by 2-3%. This episode dismantles the metabolic crisis of "bonking"—the catastrophic performance drop when muscle glycogen (your high-octane fuel) runs out, forcing a reliance on slower fat oxidation. We explain the biology of "supercompensation": how depleting glycogen in training upregulates the enzyme glycogen synthase and enhances insulin sensitivity, turning your muscles into sponges ready to store 1.5-2x their normal fuel load. The modern protocol is clear: 36-48 hours pre-race, combine a taper with 10-12 g/kg/day of low-fiber carbs; top off liver glycogen with 1-4 g/kg 1-4 hours before the start; and during the race (>2.5h), target 60-90 g/hr using dual-source (glucose-fructose) blends to maximize absorption via separate intestinal transporters (SGLT1/GLUT5). We also debunk the myth that female athletes respond differently—they store glycogen equally effectively, provided total energy and absolute g/kg intake are sufficient. This is the strategy of elites like Eliud Kipchoge and Tadej Pogačar, who push intake limits to 100-120 g/hr.Keywords: carb-loading, glycogen, supercompensation, bonking, hitting the wall, endurance, marathon, cycling, glucose, fructose🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references : Burke, L. M., Hawley, J. A., Wong, S. H., & Jeukendrup, A. E. (2011). Carbohydrates for training and competition. Journal of Sports Sciences, 29(sup1), S17-S27. https://doi.org/10.1080/02640414.2011.585473Hawley, J. A., & Leckey, J. J. (2015). Carbohydrate dependence during prolonged, intense exercise: a tale of two fuels. Journal of Applied Physiology, 119(2), 107-115. https://doi.org/10.1152/japplphysiol.00548.2014Jensen, R., Ørtenblad, N., Holmberg, H. C., & Christensen, P. M. (2025). Muscle glycogen supercompensation after cycling and running: A systematic review and meta-analysis. Frontiers in Physiology.Pöchmüller, M., Schwingshackl, L., Colombani, P. C., & Hoffmann, G. (2016). A systematic review and meta-analysis of carbohydrate benefits associated with randomized controlled competition-based performance trials. Journal of the International Society of Sports Nutrition, 13, 27. https://doi.org/10.1186/s12970-016-0139-6Tarnopolsky, M. A. (2001). Gender differences in substrate metabolism during endurance exercise. Journal of Applied Physiology, 91(1), 225-234. https://doi.org/10.1152/jappl.2001.91.1.225Thomas, D. T., Erdman, K. A., & Burke, L. M. (2016). Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance. Journal of the Academy of Nutrition and Dietetics, 116(3), 501-528. https://doi.org/10.1016/j.jand.2015.12.006Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 10 : [Science vs. Myth #5] "No Pain, No Gain?" is a LIE. Here's What Soreness REALLY Means 🏋️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: For generations, athletes have chased soreness, believing "No Pain, No Gain". The science is now clear: this is a dangerous myth. Soreness (DOMS) is not a proxy for adaptation; it is a clinical symptom of exercise-induced muscle damage (EIMD) that impairs performance. DOMS isn't the tear itself; it's the delayed "inflammatory soup" of cytokines and swelling that sensitizes your pain receptors 24-72 hours later. Stop wasting time on useless rituals: static stretching is conclusively proven to have zero effect on DOMS or strength recovery. Instead, prioritize fundamentals like 8-10 hours of sleep and immediate post-session nutrition (a 3:1 or 4:1 carb-to-protein ratio). To actively manage severe soreness, science validates massage (the most effective tool), cold water immersion (10-15 min at 10-15°C), and active recovery. However, inflammation is the signal for adaptation. Aggressively blunting it with NSAIDs (no better than placebo) or chronic ice baths might hinder long-term gains. You must periodize recovery: save aggressive tools for competition, not adaptation blocks.Keywords: doms, exercise-induced muscle damage, eimd, recovery, soreness, stretching, massage, cold water immersion, inflammation, adaptation🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Afonso, J., Clemente, F. M., Nakamura, F. Y., Morouço, P., Sarmento, H., Inman, R. A., & Ramirez-Campillo, R. (2021). The effectiveness of post-exercise stretching in short-term and delayed recovery of strength, range of motion and delayed onset muscle soreness: A systematic review and meta-analysis of randomized controlled trials. Frontiers in Physiology, 12, 677581. https://doi.org/10.3389/fphys.2021.677581Dupuy, O., Douzi, W., Theurot, D., Bosquet, L., & Dugué, B. (2018). An evidence-based approach for choosing post-exercise recovery techniques to reduce markers of muscle damage, soreness, fatigue, and inflammation: A systematic review with meta-analysis. Frontiers in Physiology, 9, 403. https://doi.org/10.3389/fphys.2018.00403Guo, J., Li, L., Gong, Y., Zhu, R., Xu, J., Zou, J., & Chen, X. (2017). Massage alleviates delayed onset muscle soreness after strenuous exercise: A systematic review and meta-analysis. Frontiers in Physiology, 8, 747. https://doi.org/10.3389/fphys.2017.00747Hill, J., Howatson, G., van Someren, K., Leeder, J., & Pedlar, C. (2014). Compression garments and recovery from exercise-induced muscle damage: a meta-analysis. British Journal of Sports Medicine, 48(18), 1340-1346. http://dx.doi.org/10.1136/bjsports-2013-092456Schoenfeld, B. J., & Contreras, B. (2013). Is postexercise muscle soreness a valid indicator of muscular adaptations?. Strength & Conditioning Journal, 35(5), 16-21. https://doi.org/10.1519/SSC.0b013e3182a61820Souza, M. C., Dantas, G. A. F., Figueiredo, D. H., & Cabral, B. G. A. T. (2021). Are non-steroidal anti-inflammatory drugs effective for delayed onset muscle soreness treatment? A systematic review and meta-analysis. Revista Brasileira de Medicina do Esporte, 27, 516-521. https://doi.org/10.1590/1517-8692202127052021 0041Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 9 : Vegan vs. Carnivore: What the Science Actually Says (And It's Not What You Think) 🌱💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: This isn't "plants vs. meat"; it's a battle of "evidence vs. anecdote." We cut through the polarized debate to reveal the massive asymmetry in scientific validation. High-level meta-analyses show well-planned vegan diets may offer a "moderate but positive effect on aerobic performance," driven by a synergy of mechanisms: enhanced blood flow via nitrate-to-nitric-oxide conversion (vasodilation), superior glycogen saturation from higher habitual carb intake, and reduced inflammation via massive antioxidant loads. Conversely, the carnivore diet exists in a performance "scientific vacuum"—a case study even showed increased physiological stress (higher heart rate), and analyses confirm it's deficient in key micronutrients like Vitamin C and magnesium, while being void of fiber. Success isn't the label; it's the execution. Vegan athletes must use a "nutrient insurance" protocol: mandatory B12 supplementation, pairing non-heme iron with Vitamin C, and combining protein sources (like rice and beans) to hit the leucine threshold. For carnivore-curious athletes, the only science-backed approach is a "strategic carb" model—using a low-carb baseline but fueling high-intensity efforts and races with 30–90 g of carbs per hour. Zach Bitter's 100-mile record wasn't a pure carnivore victory; he confirms using carbohydrates as "rocket fuel" for his peak performance.Keywords: vegan, carnivore, endurance, sports nutrition, physiology, evidence-based, metabolic flexibility, glycogen, plant-based🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references : Damasceno, Y., Leitão, C., de Oliveira, G., de Lima, J., de Carvalho, P., da Silva, D. C. M., & de Lira, C. A. B. (2024). Plant-based diets benefit aerobic performance and do not compromise strength/power performance: a systematic review and meta-analysis. British Journal of Nutrition, 131(5), 829-840. https://doi.org/10.1017/s0007114523002258Kramer, S., Carlsohn, A., & Baur, S. (2021). The impact of vegan and vegetarian diets on physical performance and molecular signaling in skeletal muscle. Current Research in Physiology, 4, 283-291. https://doi.org/10.1016/j.crphys.2021.10.003O'Hearn, A. (2024). Can a carnivore diet provide all essential nutrients? Frontiers in Nutrition, 11. https://doi.org/10.3389/fnut.2024.11722875O'Malley, M., O'Malley, T., & Williams, C. (2024). The impact of the carnivore diet on athletic performance: a case study. Journal of Exercise and Nutrition, 7(2). https://www.journalofexerciseandnutrition.com/index.php/JEN/article/view/173Rogerson, D. (2017). Vegan diets: practical advice for athletes and active individuals. Journal of the International Society of Sports Nutrition, 14(1), 36. https://doi.org/10.1186/s12970-017-0192-9Tso, R., & Forde, C. G. (2023). Nutritional considerations for the vegan athlete. Current Opinion in Clinical Nutrition and Metabolic Care, 26(4), 363-370. https://doi.org/10.1097/mco.0000000000000927Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 8 : [Science vs. Myth #4] Are You DESTROYING Your Knees? The Truth About Running Revealed 🏃💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠Summary: Does running destroy your knees? A landmark meta-analysis shatters this myth: recreational runners have a lower prevalence of knee osteoarthritis (3.5%) compared to sedentary individuals (10.2%). The "wear and tear" analogy is wrong; articular cartilage is a living, adaptive tissue that requires the "sponge mechanism" of running. This cyclical loading is vital, squeezing out waste and drawing in nutrient-rich fluid. The path to longevity is running intelligently. Build a "muscular exoskeleton" with strength training (≥ 2 days/week, 2-3 sets of 8-12 reps of compound lifts) to make muscles your primary shock absorbers. Reduce impact forces by increasing your cadence 5-10% to prevent overstriding. The risk is a U-shaped curve: inactivity (10.2%) and elite/competitive volume (13.3%) are riskier, though the elite risk may be confounded by acute injuries rather than just mileage.Keywords: running, knee, osteoarthritis, cartilage, joint health, strength training, biomechanics, cadence, u-shaped curve🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references : Alentorn-Geli, E., Samuelsson, K., Musahl, V., Green, C. L., Bhandari, M., & Karlsson, J. (2017). The association of recreational and competitive running with hip and knee osteoarthritis: A systematic review and meta-analysis. Journal of Orthopaedic & Sports Physical Therapy, 47(6), 373-390. https://doi.org/10.2519/jospt.2017.7137American College of Sports Medicine. (2009). American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. Medicine and Science in Sports and Exercise, 41(3), 687-708. https://doi.org/10.1249/MSS.0b013e3181915670Dhillon, J., Woolnough, T., Luo, T. D., Glogau, A. I., Glogau, C. R., Scillia, A. J., & Kraeutler, M. J. (2023). Effects of running on the development of knee osteoarthritis: An updated systematic review at short-term follow-up. Orthopaedic Journal of Sports Medicine, 11(3), 23259671231152900. https://doi.org/10.1177/23259671231152900Khan, M., O'Donovan, J., Charlton, J. M., Roy, J. S., Hunt, M. A., & Esculier, J. F. (2021). The influence of running on lower limb cartilage: A systematic review and meta-analysis. Sports Medicine, 51(11), 2385-2405. https://doi.org/10.1007/s40279-021-01533-5Petersen, J., Nielsen, R. O., Rasmussen, S., & Sørensen, H. (2015). The cumulative loads increase in the knee joint at slow-speed running compared with faster running: A biomechanical study. Journal of Orthopaedic & Sports Physical Therapy, 45(3), 218-225. https://doi.org/10.2519/jospt.2015.5469Voices generated by artificial intelligence from the scientific report produced by the Lactate team.