LACTATE

Episode 86 [DECODED] Running Power: The Metric That Changes Everything? ⚡💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Pace fails on hills and heart rate lags behind your effort. This episode decodes running power, the metric designed to provide an instantaneous, unified measure of your true intensity. We dissect the core technology: running power isn't a direct measurement like in cycling, but a sophisticated algorithmic proxy for your metabolic cost, calculated by IMU sensors in your watch or foot pod. You'll learn the critical difference between the "Gross Power" approach of Garmin and Polar, which includes the free elastic energy return from your tendons, and the "Net Power" approach of Stryd and Apple, which attempts to isolate pure muscular work to better correlate with your VO₂. We then provide a complete blueprint to integrate running power into your training: how to perform the scientifically validated 9/3-minute field test to find your Critical Power (CP)—a direct proxy for your lab-tested RCP—and how to structure your training using precise power zones. Finally, we expose the two "war zones" where the algorithms currently fail: the "super shoe disconnect" that breaks the link between power and metabolic cost, and soft surfaces like sand or mud where power readings become completely invalid.Keywords:running power, critical power, imu, vo₂, lactate threshold, stryd, garmin, training zones, running economy🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Ruiz-Alias et al. (2022). 9/3-Minute Running Critical Power Test: Mechanical Threshold Location With Respect to Ventilatory Thresholds and Maximum Oxygen Uptake.van Rassel et al. (2023). Is Running Power a Useful Metric? Quantifying Training Intensity and Aerobic Fitness Using Stryd Running Power Near the Maximal Lactate Steady State.Cerezuela-Espejo et al. (2021). Are we ready to measure running power? Repeatability and concurrent validity of five commercial technologies.The Ability of Stryd Footpod Metrics to Reflect Changes in Metabolic, https://www.researchgate.net/publication/385981907_The_Ability_of_Stryd_Footpod_Metrics_to_Reflect_Changes_in_Metabolic_Power_Between_Running_Shoe_TypesContextualisation of running power: a systematic review - efsupit.ro, https://efsupit.ro/images/stories/iulie2020/Art%20276.pdfVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 85 [INCREDIBLE] Will the 2-Hour Marathon Barrier Finally Fall? ⏱️💬 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 quest to break the official 2-hour marathon barrier is no longer a biological question, but an engineering puzzle. This episode dissects the absolute limits of human endurance, revealing the brutal physiological cost of maintaining a 21.1 km/h pace: a sustained oxygen uptake of 67 ml/kg/min at 94% of VO₂max. We go beyond the classic triad of endurance to explore the fourth dimension: physiological durability. Discover how running economy degrades over two hours, how a metabolic shift to fat oxidation can increase oxygen cost by 30%, and how computational fluid dynamics (CFD) prove that "swordfish" drafting formations can save over four minutes. We'll also analyze the technological arms race, from World Athletics' 40mm stack height rule to the disposable, sub-140-gram hyper-shoes changing the game. Finally, we translate this elite science into your training. Learn why a negative split strategy is almost always superior, how you can leverage drafting in your own races, and why building musculoskeletal durability is far more critical for marathon success than chasing a higher VO₂max. This is the definitive blueprint for the sub 2-hour marathon.Keywords: 2-hour marathon, marathon, running, endurance, vo₂max, running economy, aerodynamics, kelvin kiptum, hyper-shoes🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Jones, A. M., Kirby, B. S., Clark, I. E., Rice, H. M., Fulkerson, E., Wylie, L. J., ... & Joyner, M. J. (2021). Physiological demands of running at 2-hour marathon race pace. Journal of Applied Physiology, 130(2), 369-379. https://doi.org/10.1152/japplphysiol.00647.2020Angus, S. D. (2019). A Statistical Timetable for the Sub-2-Hour Marathon. Medicine & Science in Sports & Exercise, 51(7), 1460-1466. https://doi.org/10.1249/MSS.0000000000001928Polidori, G., Legrand, F., Bogard, F., Madaci, F., & Beaumont, F. (2020). Numerical Investigation of the impact of Kenenisa Bekele's cooperative drafting strategy on its running power during the 2019 Berlin marathon. Journal of Biomechanics, 107, 109854. https://doi.org/10.1016/j.jbiomech.2020.109854Joyner, M. J. (1991). Modeling: optimal marathon performance on the basis of physiological factors. Journal of Applied Physiology, 70(2), 683-687. https://doi.org/10.1152/jappl.1991.70.2.683Blocken, B., van Druenen, T., Toparlar, Y., & Andrianne, T. (2020). Wind tunnel evaluation of novel drafting formations for an elite marathon runner. Journal of Wind Engineering and Industrial Aerodynamics.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 84 [DECODED] Zone 2: Are You Doing Too Much, or Not Enough? 🎯💬 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 years, Zone 2 training was hailed as the ultimate secret for endurance, metabolic health, and longevity. But a 2025 scientific backlash has shattered this dogma, revealing a critical paradox: what works for elite athletes training 20 hours a week may be holding you back. This episode decodes the new science, explaining how high-volume Zone 2 training uniquely drives eccentric cardiac hypertrophy—mechanically stretching the heart's chambers for a larger stroke volume—and upregulates the FAT/CD36 translocase, the true bottleneck for fat oxidation. However, we reveal why for time-crunched individuals (<5 hours/week), high-intensity training (HIIT) is a vastly superior stimulus for improving mitochondrial respiratory function by more potently activating the PGC-1α signaling cascade. Learn why your smartwatch's HR formulas are likely inaccurate, why the simple "Talk Test" is still a gold standard, and how to structure your training to get the most adaptation from every minute you invest, challenging the myth of Zone 2 training's absolute supremacy.Keywords: zone 2 training, polarized training, eccentric hypertrophy, mitochondrial biogenesis, fatmax, hiit, storoschuk, continuous lactate monitor, endurance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Storoschuk, B. D., Gibala, M. J., & Gurd, B. J. (2025). *Much Ado About Zone 2: A Narrative Review Assessing the Efficacy of Zone 2 Training for Improving Mitochondrial Capacity and Cardiorespiratory Fitness in the General Population*. https://www.researchgate.net/publication/393016714_Much_Ado_About_Zone_2_A_Narrative_Review_Assessing_the_Efficacy_of_Zone_2_Training_for_Improving_Mitochondrial_Capacity_and_Cardiorespiratory_Fitness_in_the_General_PopulationGranata, C., Jamnick, N. A., & Bishop, D. J. (2016). *Training-Induced Changes in Mitochondrial Content and Respiration are Rapidly Reversed by a Reduction in Training Volume in Human Skeletal Muscle*. Victoria University Institutional Repository. https://vuir.vu.edu.au/37369/1/CGranata_MS%20-%20revision%20CLEAN%20(002).pdfMeixner, F., et al. (2025). Zone 2 Intensity: A Critical Comparison of Individual Variability in Different Submaximal Exercise Intensity Boundaries. *Sports Medicine - Open, 11*(1). https://pmc.ncbi.nlm.nih.gov/articles/PMC11986187/McFarlan, J. T., et al. (2012). In Vivo, Fatty Acid Translocase (CD36) Critically Regulates Skeletal Muscle Fuel Selection, Exercise Performance, and Training-Induced Adaptation of Fuel Metabolism. *Journal of Biological Chemistry, 287*(27), 23055–23063. https://pmc.ncbi.nlm.nih.gov/articles/PMC3390626/Meeusen, R., et al. (2013). Prevention, diagnosis, and treatment of the overtraining syndrome: joint consensus statement of the European College of Sport Science and the American College of Sports Medicine. *Medicine & Science in Sports & Exercise, 45*(1), 186-205. https://pubmed.ncbi.nlm.nih.gov/23247672/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 83 [SCIENCE VS MYTH #10] What Lactate Really Does to Your Muscles 💪💬 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 a century, athletes have cursed lactate as the cause of muscle burn and fatigue. This episode dismantles that dogma with a deep dive into the nanophysiology of performance. You will learn that the real culprits of fatigue are inorganic phosphate and ADP from ATP hydrolysis, and that lactate production actually acts as a crucial buffer against catastrophic acidosis. We explore how specialized MCT1 and MCT4 transporters shuttle lactate between cells, how your genetics (the A1470T polymorphism) dictate your clearance capacity, and how the brain uses the Astrocyte-Neuron Lactate Shuttle to fuel intense cognitive work. Discover how lactate functions as a systemic hormone—a "lactormone"—via the GPR81 receptor, and as a direct epigenetic modifier through the revolutionary discovery of histone lactylation, which rewires your genes for long-term adaptation. Finally, we translate this science into a practical blueprint: why active recovery is non-negotiable, how to use the D-max method to precisely identify your Maximal Lactate Steady State (MLSS), and how the coming wave of continuous biosensors will change training forever.Keywords:lactate, mct1, histone lactylation, mlss, d-max method, astrocyte-neuron lactate shuttle, gpr81, active recovery, exercise physiology, thermodynamics of fatigue🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :*Histone lactylation links metabolism and gene regulation*. (2019). ResearchGate. https://www.researchgate.net/publication/336768412_Histone_lactylation_links_metabolism_and_gene_regulation*The lactate shuttle during exercise and recovery*. (1986). ResearchGate. https://www.researchgate.net/publication/19639028_The_lactate_shuttle_during_exercise_and_recovery*Brain energy homeostasis: the evolution of the astrocyte-neuron lactate shuttle hypothesis*. (1994). PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11694005/*Effect of MCT1 A1470T Polymorphism on Lactate and Potassium Concentrations After Caffeine Ingestion During Acute Resistance Exercise*. (2024). MDPI. https://www.mdpi.com/2072-6643/16/24/4396*Lactate Threshold (D-Max Method) and Maximal Lactate Steady State in Cyclists*. (2009). Journal of Human Kinetics. https://johk.pl/wp-content/uploads/2023/02/10.2478_v10078-09-0006-5.pdf*Lactate as a Signaling Molecule That Regulates Exercise-Induced Adaptations*. (2016). MDPI. https://www.mdpi.com/2079-7737/5/4/38Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 82 [SEASON 2] What We Learned in S1 (And Why S2 Changes Everything) 🚀💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: What if the foundational principles of your endurance training were based on outdated science? This episode launches Season 2 by dismantling the core myths that hold athletes back. We dive deep into modern sports physiology to reveal the truth. Discover why lactate isn't a toxic waste product but a high-performance fuel and a powerful signaling molecule that boosts brain function via the GPR81 receptor. We'll show you the evidence (Lauersen et al., 2014) that static stretching doesn't prevent injuries—strength training does—and can even decrease your power output. We also shatter the myth of the 30-minute "anabolic window," explaining why total daily protein intake (1.6-2.2 g/kg) is the real driver of recovery, as confirmed by extensive meta-analyses. Finally, we explore why running strengthens, not destroys, your knee cartilage through a process called mechanotransduction. This new understanding of sports physiology provides a clear roadmap: stop fearing lactate and start training to use it better, replace pre-workout static stretches with dynamic movements, focus on your 24-hour nutrition instead of a narrow window, and run with the confidence that you're building more resilient joints. This is the new paradigm of evidence-based sports physiology.Keywords: sports physiology, training myths, endurance training, lactate, stretching, anabolic window, hrv, recovery, running science🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Sun, S., Li, H., Chen, J., & Qian, Q. (2021). Lactate: a multifunctional signaling molecule. *Frontiers in Physiology*, 12, 708353. https://pmc.ncbi.nlm.nih.gov/articles/PMC8225492/Robergs, R. A., Ghiasvand, F., & Parker, D. (2004). Biochemistry of exercise-induced metabolic acidosis. *American Journal of Physiology-Regulatory, Integrative and Comparative Physiology*, 287(3), R502-R516. https://oamonitor.ireland.openaire.eu/national/search/publication?pid=10.1152%2Fajpregu.00114.2004Lauersen, N. B., Bertelsen, D. M., & Andersen, L. B. (2014). The effectiveness of exercise interventions to prevent sports injuries: a systematic review and meta-analysis of randomised controlled trials. *British Journal of Sports Medicine*, 48(11), 871-877. https://bjsm.bmj.com/content/bjsports/48/11/871.full.pdfKay, A. D., & Blazevich, A. J. (2012). Effect of acute static stretch on maximal muscle performance: a systematic review. *Medicine & Science in Sports & Exercise*, 44(1), 154-164. https://pubmed.ncbi.nlm.nih.gov/21659901/Morton, R. W., Murphy, K. T., McKellar, S. R., Schoenfeld, B. J., Henselmans, M., Helms, E., ... & Phillips, S. M. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. *British Journal of Sports Medicine*, 52(6), 376-384. https://pubmed.ncbi.nlm.nih.gov/28698222/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 81 Blueprint 2027: The Future of Science and Extreme Athletic Optimization 🚀 💬 Got a question or feedback? Write us at: [email protected] ☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactate Summary: What happens when continuous biosensors, microbiome genetic manipulation, and extreme chemical enhancement merge to break the ultimate barriers of human biology?[cite: 4]. This final special episode projects into the year 2027 to explore the next revolution in sports performance[cite: 4]. We explore the shift from episodic testing to continuous transdermal multi-analyte sensors that measure lactate and ketones in real-time, feeding predictive AI "Digital Twins"[cite: 4]. We dive into nano-enhanced hydration and bio-engineered probiotics designed to bypass our natural carbohydrate absorption limits of 90-120g/h without gastrointestinal distress[cite: 4]. Finally, we tackle the ethical vertigo of myostatin inhibitors and gene therapy, analyzing the ideology behind the "Enhanced Games" and Bryan Johnson's Blueprint[cite: 4]. Is sports becoming a mere demonstration of biomedical engineering?[cite: 4]. We provide actionable advice to navigate this hyper-technological era without losing your interoceptive instinct or risking orthosomnia[cite: 4]. Keywords: future of sports, continuous lactate monitor, digital twins, nano-hydration, microbiome, gene doping, myostatin inhibitors, Enhanced Games, sports ethics, transhumanism 🎙️ Lactate, the podcast that deciphers science to improve your performance. Key references : The Future of Wellness Report. (2026). An Over-Optimization Backlash and Revenge of the Human: Orthosomnia and the Psychological Demands of Data Obsession. World Bio Market Insights. (2025). Bioeconomy in 2025: Engineered Living Materials (ELMs) and Microbiome Innovations in NextSkins. Horizon Europe. International Testing Agency (ITA) & WADA. (2026). The 2026 Prohibited List: Major Modifications and Explanatory Notes on Cell and Gene Doping. D'Souza, A., & Enhanced Games. (2025). Terms of Service & The Enhanced Games Philosophy. Enhanced Games Official Publications. Regeneron Pharmaceuticals. (2025). Phase 3 Clinical Trial Results: Myostatin/Activin Inhibitors and Energy Regulation Mimetics. ClinicalTrials.gov. Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 80 The Lactate Awards: Debunking the 5 Biggest Sports Physiology Myths 🏆 💬 Got a question or feedback? Write us at: [email protected] ☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactate Summary: It is time to clean house before diving into new training cycles[cite: 3]. This special season finale awards the "Lactate Awards" to the five biggest sports physiology myths completely shattered by modern science[cite: 3]. We dismantle the "30-minute anabolic window," proving that total 24-hour protein intake and quality matter far more than rushing a post-workout shake[cite: 3]. You'll discover why pre-workout static stretching actually decreases your functional stiffness and ruins your running economy[cite: 3]. Surprised to hear running destroys your knees? Epidemiological data shows recreational running is actually chondro-protective, feeding your cartilage rather than wearing it down[cite: 3]. We also challenge the "No Pain, No Gain" mentality, explaining why severe DOMS indicates structural tissue damage, not functional adaptation or growth[cite: 3]. Finally, we bury the outdated R.I.C.E. protocol (Rest, Ice, Compression, Elevation); you'll learn why icing delays cellular regeneration and why the new "PEACE & LOVE" protocol, centered on progressive mechanical loading and natural inflammation, is the absolute gold standard for recovery[cite: 3]. Keywords: sports physiology, myth debunking, anabolic window, static stretching, knee osteoarthritis, DOMS, RICE protocol, PEACE and LOVE, mechanotransduction, sports science 🎙️ Lactate, the podcast that deciphers science to improve your performance. Key references : Aragon, A. A., & Schoenfeld, B. J. (2013). Nutrient timing revisited: Is there a post-exercise anabolic window? Journal of the International Society of Sports Nutrition, 10(1), 5. Alentorn-Geli, E., et al. (2017). The association of recreational and competitive running with osteoarthritis of the hip and knee: A systematic review and meta-analysis. Journal of Orthopaedic & Sports Physical Therapy, 47(6), 373-390. Dubois, B., & Esculier, J. F. (2019). Soft-tissue injuries simply need PEACE and LOVE. British Journal of Sports Medicine, 54(2), 72-73. Schoenfeld, B. J., & Contreras, B. (2013). Is postexercise muscle soreness a valid indicator of muscular adaptation? Strength & Conditioning Journal, 35(5), 16-21. Afonso, J., et al. (2021). Is delayed onset muscle soreness a valid proxy for muscle hypertrophy? A literature review. Frontiers in Physiology, 12, 736166. Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 79 Off-Season Strategy How to Rest Without Getting Fat or Slow 🧬💬 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 off-season isn't a break; it's a calculated biological gamble. This episode dismantles the myth that total rest is recovery, revealing it as a form of structured atrophy. We dissect the science of detraining, explaining the biphasic decay of your VO₂ max—the initial, rapid drop caused by contracting blood plasma volume, followed by a slower decline in mitochondrial enzymes. You'll learn why your hard-earned capillary networks (the "plumbing") remain intact while the enzymes (the "water") drain away, and how this explains your ability to regain fitness quickly. We also expose the metabolic crisis of inactivity: plummeting insulin sensitivity via GLUT4 downregulation, which turns your body into a fat-storage machine. To counter this, we provide a blueprint based on the Minimum Effective Training Dose (METD) to preserve fitness with just 2-3 sessions per week, emphasizing non-negotiable intensity. Finally, we detail the principles of Nutritional Periodization—aggressively cutting carbs while keeping protein high (1.6-2.5 g/kg)—to prevent fat gain and muscle loss, ensuring you start the next season stronger, not slower.Keywords: off-season, detraining, nutritional periodization, minimum effective training dose, vo₂ max, insulin sensitivity, sarcopenia, endurance training, transition phase🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Mujika, I., & Padilla, S. (2000). Detraining: loss of training-induced physiological and performance adaptations. Part I: short term insufficient training stimulus. *Sports Medicine, 30*(2), 79-87. https://pubmed.ncbi.nlm.nih.gov/10966148/Mujika, I., & Padilla, S. (2000). Detraining: loss of training-induced physiological and performance adaptations. Part II: long term insufficient training stimulus. *Sports Medicine, 30*(3), 155-164. https://pubmed.ncbi.nlm.nih.gov/10999420/Madsen, K., Pedersen, P. K., Djurhuus, M. S., & Klitgaard, N. A. (1993). Effects of detraining on endurance capacity and metabolic changes during prolonged exhaustive exercise. *Journal of Applied Physiology, 75*(4), 1444–1451. https://pubmed.ncbi.nlm.nih.gov/8282588/Spiering, B. A., Mujika, I., Sharp, M. A., & Foulis, S. A. (2021). Maintaining physical performance: The minimal dose of exercise needed to preserve endurance and strength over time. *Journal of Strength and Conditioning Research, 35*(5), 1449–1458. https://pubmed.ncbi.nlm.nih.gov/33629972/Barbieri, E., Zignoli, A., Biral, F., & Schena, F. (2024). Cardiorespiratory and metabolic consequences of detraining in endurance athletes. *Frontiers in Physiology, 14*. https://pmc.ncbi.nlm.nih.gov/articles/PMC10853933/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 78 The Running Injury Repair Manual Fixing the "Big 4" Without Stopping 🏃💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Tired of the "Boom-Bust" injury cycle where you rest, feel better, and then immediately get hurt again? This episode dismantles the outdated "rest and wait" model for the "Big 4" running injuries: Patellofemoral Pain (Runner's Knee), IT Band Syndrome, Plantar Fasciitis, and Achilles Tendinopathy. We reveal why these are not inflammatory crises ("-itis") but degenerative problems ("-osis") that require mechanical loading to heal. You'll learn the two critical frameworks for active recovery: Dr. Scott Dye's "Envelope of Function," which explains how to progressively expand your tissue's capacity, and the Silbernagel "Pain-Monitoring Model," a 'Traffic Light' algorithm (0-5/10 pain) with a strict 24-hour rule that tells you exactly how much load is safe. We provide a precise, evidence-based blueprint to fix each injury without stopping your training, from using the Rathleff Protocol's heavy-load heel raises to fix plantar fasciitis, to understanding why ITBS is a compression (not friction) syndrome that requires glute strengthening, not foam rolling the band itself.Keywords: running injury, patellofemoral pain, it band syndrome, plantar fasciitis, achilles tendinopathy, mechanotherapy, rehabilitation, pain monitoring, sports science🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Dye, S. F. (2005). The pathophysiology of patellofemoral pain: a tissue homeostasis perspective. *Clinical Orthopaedics and Related Research*, *436*, 100-110.Fairclough, J., et al. (2006). The functional anatomy of the iliotibial band during flexion and extension of the knee: implications for understanding iliotibial band syndrome. *Journal of Anatomy*, *208*(3), 309–316.Rathleff, M. S., et al. (2015). High-load strength training improves outcome in patients with plantar fasciitis: A randomized controlled trial with 12-month follow-up. *Scandinavian Journal of Medicine & Science in Sports*, *25*(3), e292-e300.Silbernagel, K. G., et al. (2007). Continued sports activity, using a pain-monitoring model, during rehabilitation in patients with Achilles tendinopathy: a randomized controlled study. *The American Journal of Sports Medicine*, *35*(6), 897-906.Ashtiani, A. A., et al. (2025). Effectiveness of combining a proximal strengthening exercise program and foot orthosis on pain and performance among women with patellofemoral pain syndrome and a pronated foot: study protocol for a randomized clinical trial. *Trials*, *23*.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 77 [IRONMAN NUTRITION SPECIAL] Fueling for a 10+ Hour Race 🏊‍♂️💬 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 televised collapse of Julie Moss at the 1982 Ironman cemented nutrition as the "Fourth Discipline," proving that mental toughness cannot override thermodynamics. This episode dissects the unique bioenergetic crisis of a 10+ hour race, moving beyond simple gels to explore the inescapable caloric deficit where expenditure (700-1,000 kcal/hr) dwarfs absorption capacity (~400 kcal/hr). We unpack the severe consequences of splanchnic ischemia—the shutdown of blood flow to your gut—and the neurobiology of Sensory-Specific Satiety, the "flavor fatigue" that causes your brain to reject the very fuel you need to survive. This deep dive delivers a practical blueprint for execution: learn the elite caffeine micro-dosing protocol that avoids the late-race crash, how to optimize your bike's aerodynamics to carry fuel without penalty, why training your gut with race-day nutrition is non-negotiable, and how to use your Special Needs bags to deliver a "sensory reset" that keeps you fueling for all 10, 12, or 17 hours.Keywords: ironman, ultra-endurance, nutrition, physiology, splanchnic ischemia, glycogen, caffeine, gut training, aerodynamics, flavor fatigue🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Dasa, M. S., Bu, O. A., Sandbakk, Ø., Rønnestad, B. R., Plasqui, G., Gundersen, H., & Kristoffersen, M. (2024). Training volume and total energy expenditure of an Olympic and Ironman world champion: approaching the upper limits of human capabilities. *Journal of Applied Physiology*.Costa, R. J. S., et al. (2017). Gastrointestinal distress: Running versus cycling under matched conditions. *Journal of Science and Medicine in Sport*.How endurance athletes can beat 'flavour fatigue'. Precision Fuel & Hydration. https://www.precisionhydration.com/performance-advice/nutrition/what-is-flavour-fatigue-and-how-endurance-athletes-can-keep-fueling/How much caffeine should you use DURING training and races? Precision Hydration. https://www.precisionhydration.com/performance-advice/nutrition/how-much-caffeine-should-athletes-use/Ironman's New Bike Hydration Rules 2024: What You Need to Know. Dietitian Approved. https://www.dietitianapproved.com/blog/ironman-bike-hydration-rules-2024Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 76 [UTMB PREP #2] Hallucinations & Nightmares When the Brain Breaks 🧠💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Seeing a phantom menagerie of pugs lining the trail or stars draping around your shoulders isn't madness—it's predictable neurobiology. This deep dive dismantles the dangerous myth that ultra-endurance hallucinations are caused by dehydration or metabolic collapse. We reveal the true scientific culprits: extreme sleep pressure forces fragments of REM sleep (your dream state) to intrude into your waking consciousness, while sensory deprivation and neurochemical stress cause your brain to fabricate its own reality. Based on the landmark research of Guillaume Millet, we explain the "Central Fatigue Plateau"—how your brain sacrifices cognitive function to save your muscles from total destruction. Learn the critical difference between elite and amateur sleep strategies, from pre-race sleep banking to mastering the 20-minute micro-nap. We provide the blueprint to manage these Anomalous Perceptual Experiences, explain why you must NOT over-hydrate in response, and teach you how to differentiate a benign vision from life-threatening High Altitude Cerebral Edema (HACE).Keywords: ultra-endurance, utmb, hallucination, sleep deprivation, central fatigue, neuroscience, sports science, ultramarathon, rem sleep, chronobiology🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Anomalous Perceptual Experience During Ultra-Endurance Sport: A Systematic Review. (n.d.). *PubMed*. https://pubmed.ncbi.nlm.nih.gov/41847782/Visual hallucinations in 246-km mountain ultra-marathoners: An observational study. (n.d.). *PubMed*. https://pubmed.ncbi.nlm.nih.gov/34708714/Millet, G., et al. (2011). Neuromuscular Consequences of an Extreme Mountain Ultra-Marathon. *PLOS ONE*. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0017059Millet, G., et al. (n.d.). Alterations of Neuromuscular Function after the World's Most Challenging Mountain Ultra-Marathon. *PLOS*. https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0065596&type=printableSleep habits and strategies of ultramarathon runners. (n.d.). *PMC - NIH*. https://pmc.ncbi.nlm.nih.gov/articles/PMC5942705/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 75 [TOUR DE FRANCE SCIENCE] Power, Watts & The 8,000-Calorie Limit 🚴‍♂️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: How are modern Tour de France riders shattering records from the EPO era on heavier bikes? This episode deconstructs the staggering bioenergetics behind Tadej Pogačar’s 7.0 W/kg ascents. We dissect the core science, starting with Herman Pontzer's "Alimentary Limit"—a hard ceiling on human endurance at 2.5 times your Basal Metabolic Rate (BMR). You'll learn why the Tour, at a punishing 4.9x BMR, is a 21-day exercise in controlled metabolic self-destruction, survivable only due to its short duration. We then break down the brutal thermodynamics of climbing: with a Gross Mechanical Efficiency of only 23%, a rider's body must dissipate nearly 1500 watts of waste heat, all while their gut is starved of blood flow. This analysis explains the modern fueling revolution, where ingesting 120g/hr of carbohydrates via a precise 1:0.8 glucose-to-fructose ratio is now standard. Finally, we translate this elite science into an actionable blueprint for you. Learn why you must respect the 2.5x BMR limit on multi-day adventures, how to implement a low-residue pre-race diet, the benefits of fueling Zone 2 rides, and how to "train your gut" to avoid catastrophic GI distress.Keywords: tour de france, cycling, physiology, w/kg, vo₂max, nutrition, alimentary limit, tadej pogačar, gross efficiency, gut training🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Thurber, C., Dugas, L.R., Ocobock, C., Carlson, B., Speakman, J.R., & Pontzer, H. (2019). Extreme events reveal an alimentary limit on sustained maximal human energy expenditure. *Science Advances, 5*(6), eaaw0341. https://www.researchgate.net/publication/333729202_Extreme_events_reveal_an_alimentary_limit_on_sustained_maximal_human_energy_expenditureBerg, O. K. (2024). The Exceptional Power Outputs and VO₂ of climbing in the Tour de France. *Journal of Science and Cycling*. https://www.jsc-journal.com/index.php/JSC/article/view/1054EF Pro Cycling. (n.d.). The Science of Gut Training: How Tour de France Riders Maximize... Retrieved May 2, 2026, from https://www.efprocycling.com/tips-recipes/tour-de-france-tips-gut-training/road.cc. (2024). Comparing the Tour de France bikes that won on the Plateau de Beille in 1998 and 2024: Marco Pantani's Bianchi Mega Pro XL vs Tadej Pogačar's Colnago V4Rs. Retrieved May 2, 2026, from https://road.cc/content/feature/pantanis-1998-bianchi-vs-pogacars-2024-colnago-309423Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 74 [UTMB PREP #1] Bulletproof Quads The Science of Eccentric Loading 💪💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Why do elite runners with massive VO₂max engines fail at UTMB? It's not their lungs; it's catastrophic quadriceps failure on the 10,000 meters of descent. Each footstrike can exceed five times your body weight, and without specific preparation, your muscles will mechanically collapse. This episode dives into the science of "bulletproofing" your quads. We explore eccentric loading—the "negative work" that acts as your body's braking system. Discover the revolutionary "Three-Filament Model" of muscle contraction, where the giant protein titin acts as a molecular bungee cord, allowing you to produce forces 50% higher than your concentric max with a fraction of the oxygen cost. We also unpack the 2024 landmark discovery of sarcomerogenesis: proof that eccentric training forces your muscles to physically grow longer by adding new contractile units, building biological armor against damage. Learn how to weaponize the "Repeated Bout Effect" (RBE), a potent adaptation where a single damaging session provides up to six months of protection. We provide a blueprint for all athletes: the "inoculation run" (a targeted downhill session 3-5 weeks pre-race) and Tempo Eccentric Training in the gym. Finally, we expose the critical mistakes that lead to failure, from improper tapering to over-striding on descents.Keywords: eccentric loading, utmb, trail running, sarcomerogenesis, titin, repeated bout effect, muscle damage, downhill running, strength training🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Andrews, N. C., Hedges, C. P., Lahey, K. A., Sharafi, M., Lizzio, V. A., & Herzog, W. (2024). Massive sarcomerogenesis in human skeletal muscle following long-term eccentric exercise intervention. *Scientific Reports*, *14*(1), 12891. https://pmc.ncbi.nlm.nih.gov/articles/PMC11863339/Hody, S., Croisier, J. L., Leprince, P., & Collard, F. (2019). The mysteries of eccentric muscle action. *Frontiers in Physiology*, *10*, 696. https://pmc.ncbi.nlm.nih.gov/articles/PMC6189265/Maroto-Izquierdo, S., García-López, D., & de Paz, J. A. (2017). Implementing Flywheel (Isoinertial) Exercise in Strength Training: Current Evidence, Practical Recommendations, and Future Directions. *Frontiers in Physiology*, *8*, 1193. https://pmc.ncbi.nlm.nih.gov/articles/PMC7283738/Nishikawa, K. C., Monroy, J. A., Uyeno, T. E., Yeo, S. H., Pai, D. K., & Lindstedt, S. L. (2012). Is titin a 'winding filament'? A new twist on muscle contraction. *Journal of Experimental Biology*, *215*(Pt 23), 4011–4019. https://pmc.ncbi.nlm.nih.gov/articles/PMC3259925/Nosaka, K., Newton, M., & Sacco, P. (2001). How long does the protective effect on eccentric exercise-induced muscle damage last? *Medicine and Science in Sports and Exercise*, *33*(9), 1490–1495. https://pubmed.ncbi.nlm.nih.gov/11528337/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 73 [TOUR DE FRANCE FUN] Wine, Cigarettes & Nails The Craziest Stories 🚲💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Imagine a Tour de France where riders drank wine for hydration, smoked cigarettes on climbs, and survived armed mobs and roads littered with nails. This episode dissects the brutal physiology behind these historical myths. We reveal why alcohol, believed to be a fuel source, actually catastrophically impairs thermoregulation by acting as a peripheral vasodilator and suppressing antidiuretic hormone, leading to severe dehydration and cardiovascular drift. You'll learn how smoking to "open the lungs" introduced carbon monoxide that suffocated the oxygen transport system by forming carboxyhemoglobin, which has an affinity for hemoglobin 250 times greater than oxygen, crippling your VO₂ max. We then connect this primitive self-sabotage to the cutting-edge (and now banned) practice of carbon monoxide rebreathing, a method used by top teams to artificially trigger EPO production by manipulating the HIF-1α pathway, mimicking altitude training at sea level. Finally, we translate these historical errors into a practical blueprint for you: why ethanol must never be used for intra-race fueling, the dangers of overriding your brain's central governor, and the lethal risks of chasing marginal gains with toxicological "hacks."Keywords: tour de france, physiology, ethanol, carbon monoxide, doping, endurance, cycling, epo, hif-1α, history🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Lecoultre, V., & Schutz, Y. (2009). Effect of a small dose of alcohol on the endurance performance of trained cyclists. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/19136497/nachrichten.idw-online.de. (2020, August 4). *University of Bayreuth Study: Carbon monoxide improves endurance performance*. IDW. https://nachrichten.idw-online.de/2020/08/04/university-of-bayreuth-study-carbon-monoxide-improves-endurance-performanceTrainingPeaks. (n.d.). *The Science and Controversy of Carbon Monoxide Rebreathing*. Retrieved April 7, 2026, from https://www.trainingpeaks.com/blog/carbon-monoxide-rebreathing/Vella, L. D., & Cameron-Smith, D. (2010). Alcohol, athletic performance and recovery. *Nutrients*, *2*(8), 781–789. https://pmc.ncbi.nlm.nih.gov/articles/PMC3257708/Zinner, C., & Schmidt, W. (2024). Low-dose carbon monoxide inhalation to increase total hemoglobin mass and endurance performance: scientific evidence and implications. *Journal of Applied Physiology*, *136*(6), 1335-1337. https://pmc.ncbi.nlm.nih.gov/articles/PMC11519625/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 72 The Future of Doping Biological Passports and New Detectable Drugs 🧬💬 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 anti-doping arms race has reached a critical inflection point. Forget simply testing for drugs; the future is about tracking your unique biological footprint. This episode deciphers the Athlete Biological Passport (ABP), the revolutionary system that uses Bayesian statistical models to detect doping's secondary effects. We break down the mathematics of the OFF-score, explaining how it forensically distinguishes the abrupt hematological shifts of rhEPO micro-dosing from the gradual adaptations of altitude training. We also explore the cutting-edge science that has shattered the myth of "undetectable" gene doping, detailing how new assays like HiMDA can now identify CRISPR-Cas9 modifications in a tiny blood sample. For elite athletes, the 2026 WADA code brings massive changes. We provide a practical blueprint for navigating the new 60-minute post-exercise testing window, the strict prohibition on blood withdrawal without a TUE, and the career-ending risks of unregulated research peptides like BPC-157, which can be prosecuted through non-analytical evidence alone.Keywords: athlete biological passport, wada, doping, crispr, epo, micro-dosing, anti-doping, sports science, hif stabilizers🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Yi, H., et al. (2025). High-throughput multiplexed gene and cell doping analysis through CRISPR-Cas12a system integrated with blood direct PCR. *Science Advances*. https://pmc.ncbi.nlm.nih.gov/articles/PMC12239944/AbuHaweeleh, M., et al. (2025). Integrating Advanced Metabolomics and Machine Learning for Anti-Doping in Human Athletes. *Metabolites*. https://www.mdpi.com/2218-1989/15/11/696Sottas, P. E., et al. (2018). A Bayesian Approach for the Use of Athlete Performance Data for Anti-Doping Purposes. *Frontiers in Physiology*. https://pmc.ncbi.nlm.nih.gov/articles/PMC6060570/Zorzoli, M., et al. (2021). Factors Confounding the Athlete Biological Passport: A Systematic Narrative Review. *Nutrients*. https://pmc.ncbi.nlm.nih.gov/articles/PMC8443715/World Anti-Doping Agency. (2026). *WADA publishes revised 2026 International Standard for Testing and Investigations with changes to blood collection wait times for Athletes*. WADA News. https://www.wada-ama.org/en/news/wada-publishes-revised-2026-international-standard-testing-and-investigations-changes-bloodVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 71 Insoles & Orthotics Do You Really Need Them or Is It Marketing? 🦶💬 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 foot orthotics market is projected to hit $8.4 billion, but is the technology based on solid science or just clever marketing? This episode dismantles the outdated dogma of mechanically "correcting" your foot's alignment, pioneered by Dr. Merton Root. We explore the modern neurophysiological revolution led by Dr. Benno Nigg, whose "Muscle Tuning" and "Comfort Filter" paradigms reframe orthotics as sensory input devices that work with your body's preferred movement path, not against it. We reveal the hard data: ultrasound studies prove that 12 weeks of custom orthotic use can trigger rapid disuse atrophy, shrinking key intrinsic foot muscles like the abductor hallucis by over 17%. Finally, we deliver an actionable blueprint: learn why a $50 prefabricated insert is often clinically equivalent to a $500 custom device for plantar fasciitis, why "short-foot" exercises are mandatory to prevent muscle wasting, and the critical reason you must never combine custom orthotics with carbon-plated super shoes due to severe biomechanical conflicts that negate performance and increase injury risk.Keywords: orthotics, insoles, biomechanics, running economy, foot muscle, plantar fasciitis, super shoes, benno nigg, comfort filter, injury prevention🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Cochrane, R., et al. (2019). The effect of foot orthoses and insoles on running economy and performance in distance runners: A systematic review and meta-analysis. Journal of Sports Sciences. https://pubmed.ncbi.nlm.nih.gov/31423908/Jung, D. Y., et al. (2011). Effect of foot orthoses and short-foot exercise on the cross-sectional area of the abductor hallucis muscle in subjects with pes planus: a randomized controlled trial. Journal of Back and Musculoskeletal Rehabilitation. https://pubmed.ncbi.nlm.nih.gov/22142711/Nigg, B. M., Baltich, J., Hoerzer, S., & Enders, H. (2015). Running shoes and running injuries: mythbusting and a proposal for two new paradigms: 'preferred movement path' and 'comfort filter'. British Journal of Sports Medicine. https://bjsm.bmj.com/content/49/20/1290Protopapas, K., et al. (2020). The effect of a 12-week custom foot orthotic intervention on muscle size and muscle activity of the intrinsic foot muscle of young adults during gait termination. Clinical Biomechanics. https://pubmed.ncbi.nlm.nih.gov/32521283/Tran, K., & Spry, C. (2019). Custom-Made Foot Orthoses versus Prefabricated Foot Orthoses: A Review of Clinical Effectiveness and Cost-Effectiveness. Canadian Agency for Drugs and Technologies in Health. https://www.ncbi.nlm.nih.gov/books/NBK549527/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 70 Returning from Injury The Exact Protocol to Start Running Again ⚕️💬 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 40 years, the RICE protocol (Rest, Ice, Compression, Elevation) has been the unquestioned dogma for treating injuries. This episode dismantles that myth, revealing how its origin stems from a 1962 surgical procedure to reattach a severed arm, not sports science. We dive deep into the cellular biology of healing, explaining why applying ice and taking NSAIDs is catastrophic for tissue repair. You'll learn how these methods block the essential inflammatory cascade, halting the macrophage and IGF-1 signaling required to build new, strong tissue. We replace the outdated RICE with the evidence-based PEACE & LOVE framework, detailing the science of mechanotransduction—how controlled mechanical stress is the true catalyst for organized, resilient recovery. This isn't just theory; it's a practical blueprint. We provide the exact, non-negotiable exit criteria you must meet before your first run (e.g., >80% Limb Symmetry Index, 1.45 Nm/kg quadriceps strength). You'll get a stage-gated walk-run protocol and learn to use the Silbernagel Pain-Monitoring Model, which shows that running with pain up to 5/10 is not only safe but optimal for tissue remodeling. Finally, we address the psychological hurdles, quantifying the fear of reinjury (kinesiophobia) and exposing why traditional hop tests can be dangerously misleading.Keywords: injury, rehabilitation, running, peace & love, rice protocol, mechanotransduction, kinesiophobia, tendinopathy🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Dubois, B., & Esculier, J. F. (2019). Soft-tissue injuries simply need PEACE and LOVE. *British Journal of Sports Medicine*, *54*(2), 72-73.Kotsifaki, A., et al. (2022). Measuring only hop distance during single leg hop testing is insufficient to detect deficits in knee function after ACL reconstruction. *British Journal of Sports Medicine*, *56*(5), 249-254.Silbernagel, K. G., Thomeé, R., Eriksson, B. I., & Karlsson, J. (2007). Continued sports activity, using a pain-monitoring model, during rehabilitation in patients with Achilles tendinopathy. *The American Journal of Sports Medicine*, *35*(6), 897-906.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 69 The Norwegian Method Double Thresholds Explained for Amateurs 🧬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: How did Norwegian athletes rewrite the record books in running and triathlon? This episode dissects the science behind their controversial training system: the double-threshold day. We reveal why the "Golden Zone" for adaptation is a strict 2.3–3.0 mmol/L of blood lactate, debunking the old 4.0 mmol/L laboratory standard. You'll learn the critical biomechanics: how splitting a massive workload into two sessions, separated by a 6-to-8-hour window, allows you to manipulate muscle viscoelasticity and "outrun" the inflammatory cascade that causes DOMS. We break down the landmark Ghiarone et al. (2019) study, which proves that the second, glycogen-depleted session enhances mitochondrial *efficiency*, not just volume. We also explore the fierce academic debate between this Pyramidal model and Dr. Stephen Seiler's Polarized approach and provide a practical blueprint for amateurs, detailing the minimum volume required and the critical mistakes to avoid so you can apply these principles without risking injury.Keywords: norwegian method, double threshold, lactate, pyramidal training, polarized training, stephen seiler, marius bakken, mitochondrial efficiency, endurance, vo₂🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bakken, M. (2025). The Norwegian Model Revisited. https://www.mariusbakken.com/the-norwegian-model.htmlGhiarone, T., Andrade-Souza, V. A., Learsi, S. K., et al. (2019). Twice-a-day training improves mitochondrial efficiency, but not mitochondrial biogenesis, compared with once-daily training. *Journal of Applied Physiology*, 127(3), 713-725. DOI: 10.1152/japplphysiol.00060.2019Kelemen, B., Benczenleitner, O., & Tóth, L. (2023). The Norwegian double-threshold method in distance running: Systematic literature review. *Scientific Journal of Sport and Performance*, 3(1), 38–46. DOI: 10.55860/NBXV4075PointFit Technology. (2026). PF-Sweat Patch: Non-invasive & Continuous Lactate Sensor. https://www.ces.tech/ces-innovation-awards/2026/pf-sweat-patch-non-invasive-continuous-lactate-sensor/Seiler, S. (2023). Norwegian Method or Just Good Holistic Practice? Fast Talk Laboratories. https://www.fasttalklabs.com/fast-talk/norwegian-method-or-just-good-holistic-practice-with-dr-stephen-seiler/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 68 Genetics vs. Hard Work Is Your VO2max Ceiling Fixed at Birth? 🧬💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Are you born with a fixed aerobic ceiling, or can hard work shatter any genetic limit? This episode dismantles the nature vs. nurture debate for endurance performance. We explore why the man with the highest recorded VO₂max in history, Oskar Svendsen, retired before 21, and how Finnish skier Eero Mäntyranta dominated the Olympics with a rare genetic mutation. Based on landmark research like the HERITAGE Family Study, we reveal that while genetics dictate about 50% of your baseline fitness and 47% of your trainability, the concept of a "non-responder" is a physiological illusion. The science is clear: a lack of progress is a failure of training dose, not DNA. We break down the Fick equation to show how central cardiac output is the ultimate bottleneck, and how epigenetic changes—specifically the demethylation of the PGC-1α promoter—drive peripheral muscle adaptations. Finally, we provide a practical blueprint: amateurs must focus on escalating volume to expand hemoglobin mass, while elites must chase marginal gains through mechanical efficiency and epigenetic resensitization.Keywords: vo₂max, genetics, endurance, training, epigenetics, pgc-1α, heritage study, non-responder, cardiac output, athletic potential🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bouchard, C., An, P., Rice, T., Skinner, J. S., Wilmore, J. H., Gagnon, J., Pérusse, L., Leon, A. S., & Rao, D. C. (1999). Familial aggregation of VO2max response to exercise training: Results from the HERITAGE Family Study. *Journal of Applied Physiology, 87*(3), 1003–1008. https://doi.org/10.1152/jappl.1999.87.3.1003Montero, D., & Lundby, C. (2017). Refuting the myth of non-response to exercise training: 'non-responders' do respond to higher dose of training. *The Journal of Physiology, 595*(11), 3377-3387. https://doi.org/10.1113/JP273480Levine, B. D. (2008). VO2max: what do we know, and what do we still need to know? *The Journal of Physiology, 586*(1), 25–34. https://doi.org/10.1113/jphysiol.2007.147629Barrès, R., et al. (2012). Acute exercise remodels promoter methylation in human skeletal muscle. *Cell Metabolism*.MedRxiv. (2024). Delphi: Deep learning for phenotype inference and polygenic risk score computation. https://doi.org/10.1101/2024.04.19.24306079v3Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 67 The "Post-Race Blues" Dealing with the Dopamine Crash After the Finish Line 🧠💬 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've crossed the finish line, achieved your macro-goal, but instead of lasting fulfillment, you feel a profound emptiness. This is the "post-race blues," a neurobiological phenomenon driven by the "Arrival Fallacy"—the mistaken belief that achieving a goal brings permanent happiness. The science shows that success can actually exacerbate this crash, a reality proven by Olympians who often suffer more than those who fall short. This isn't just in your head; it's a quantifiable neurochemical deficit. Your brain's reward system, the mesocorticolimbic pathway, is wired for anticipation, not attainment. During training, it becomes a dopamine factory, motivating the chase. But once you cross the finish line, this anticipatory dopamine signaling collapses. Chronic training also forces your brain to downregulate D2 dopamine receptors to protect against neurotoxicity. Post-race, you're left with suppressed dopamine production and desensitized receptors, leading to clinical anhedonia—the inability to feel pleasure from everyday activities. This "neurotransmitter sink" is compounded by the abrupt normalization of the HPA axis, as stress hormones like cortisol plummet, which your brain interprets as a depressive letdown. To navigate this crash, you must rewire your brain's reward architecture. In the first 48 hours, detach from performance analysis to allow your nervous system to shift into a restorative state. For the next two weeks, replace the single massive dopamine source of training with a "micro-dopamine menu": engage in novel, low-stakes activities like learning an instrument or cooking a new recipe. Crucially, do not sign up for another race immediately or resort to absolute bed rest. Instead, implement a minimum effective dose of movement, like daily walks, to re-regulate neurotransmitter production safely. If profound anhedonia and apathy persist beyond six weeks, seek professional medical help.Keywords: post-race blues, dopamine, arrival fallacy, anhedonia, overtraining syndrome, athletic identity, neurotransmitter sink, hpa axis🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Howells, K., & Lucassen, M. (2018). 'Post-Olympic blues' –The diminution of celebrity in Olympic athletes. ResearchGate. https://www.researchgate.net/publication/324811721_'Post-Olympic_blues'_-The_diminution_of_celebrity_in_Olympic_athletesBerridge, K. C., & Kringelbach, M. L. (2015). Pleasure systems in the brain. Psychology Today. https://www.psychologytoday.com/us/blog/motivate/202504/the-dopamine-deficit-why-success-may-feel-emptyMacIntyre, T., et al. (2024). Post-race reactions: The emotional paradox of high performance and anxiety – a conventional content analysis. BMC Sports Science, Medicine and Rehabilitation. https://pmc.ncbi.nlm.nih.gov/articles/PMC11360306/Huberman Lab. (n.d.). Tools to Manage Dopamine and Improve Motivation & Drive. Huberman Lab. Retrieved April 5, 2026, from https://www.hubermanlab.com/newsletter/tools-to-manage-dopamine-and-improve-motivation-and-driveNeuroscience Research Institute. (n.d.). Running Marathons and the Hidden Toll on the Brain. Neuroscience Research Institute. Retrieved April 5, 2026, from https://www.neuroscienceresearchinstitute.com/running-marathons-and-the-hidden-toll-on-the-brain/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 66 Why Athletes Get Sick Right Before Race Day 🤒💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: It's the ultimate paradox: you're in peak physical condition, but days before your goal race, a sore throat and cough derail your performance. This episode dismantles the decades-old "Open Window" theory that claimed hard exercise destroys your immune system. Based on a landmark 2018 systematic review, we reveal the truth: your immune cells don't die; they are strategically redeployed to your lungs and gut for heightened surveillance. We explore the real culprits behind "Taper Flu." First, the "Let-Down Effect," where the sudden drop in stress hormones during your taper unmasks latent viruses you contracted weeks ago. Second, Psychoneuroimmunology (PNI), which shows how pre-race anxiety crushes your mucosal immunity (salivary IgA), opening the door to infection. Third, the shocking fact that up to 70% of your symptoms may be non-infectious airway inflammation—a "fake" cold caused by mechanical trauma from heavy breathing. Learn the actionable strategies to protect yourself: why you must taper your mind as well as your body, the danger of cutting calories, and how to use sleep and hygiene to arrive at the start line healthy and ready to perform.Keywords: immunology, taper, overtraining, psychoneuroimmunology, cortisol, open window theory, upper respiratory tract infection, marathon, endurance🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Campbell, 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. *Frontiers in Immunology, 9*, 648. https://pmc.ncbi.nlm.nih.gov/articles/PMC5911985/Peters, E. M., & Bateman, E. D. (1983). Ultramarathon running and upper respiratory tract infections. An epidemiological survey. *South African Medical Journal, 64*(15), 582–584.Nieman, D. C., et al. (1990). Los Angeles Marathon Study. *J. Sports Med. Phys. Fitness*.Krüger, K., & Mooren, F. C. (2019). Current Knowledge and New Challenges in Exercise Immunology. *German Journal of Sports Medicine*. https://www.germanjournalsportsmedicine.com/archive/archive-2019/issue-10/current-knowledge-and-new-challenges-in-exercise-immunology/Vingerhoets, A. (2002). Leisure Sickness: A Biopsychosocial Perspective. *ResearchGate*. https://www.researchgate.net/publication/26571455_Leisure_Sickness_A_Biopsychosocial_PerspectiveGleeson, M., et al. (2011). Cytokine gene polymorphisms and risk for upper respiratory symptoms in highly-trained athletes. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/20839488/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 65 The 5-Minute CORE Secret That Unlocks Speed & Prevents 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:Forget the "six-pack." This episode dismantles the aesthetic myths and rebuilds your understanding of the core from the ground up, based on elite biomechanics. We reveal why the military abandoned the sit-up after Dr. Stuart McGill’s research proved it caused catastrophic spinal damage, and why your focus should be on proximal stiffness, not flexion. You will learn how the core functions as a muscular cylinder—from the diaphragm to the pelvic floor—to generate Intra-Abdominal Pressure (IAP), creating a rigid platform for power transfer. We break down landmark studies showing how a stronger transversus abdominis and multifidus directly correlate to faster sprint times and improved running economy (lower VO₂). Discover how to prevent "Energy Leaks" and compensatory injuries like Trendelenburg gait by strengthening the quadratus lumborum. Finally, we provide actionable 5-minute "micro-dose" protocols like McGill's "Big 3" and Foundation Training, teaching you to build neuromuscular stability, not just chase a burn.Keywords: core stability, running economy, injury prevention, transversus abdominis, intra-abdominal pressure, Stuart McGill, energy leak, 5-minute workout, proximal stiffness🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :A 100-m Sprint Time Is Associated With Deep Trunk Muscle Thickness in Collegiate Male Sprinters. (2020). *Frontiers in Sports and Active Living*. https://pmc.ncbi.nlm.nih.gov/articles/PMC7739772/Hung, K.-C., et al. (2019). Effects of 8-week core training on core endurance and running economy. *PLoS ONE*, *14*(3), e0213158. https://pubmed.ncbi.nlm.nih.gov/30849105/Lederman, E. (2010). The myth of core stability. *CPDO.net*. https://www.cpdo.net/Lederman_The_myth_of_core_stability.pdfMcGill, S. (n.d.). *Why Everyone Needs Core Training*. Perform Better. https://www.performbetter.com/why-everyone-needs-core-trainingMyers, B. (n.d.). *Sit-Ups, Crunches, Planks, Knee-Ups: The Evolution of Core Fitness Testing*. Military.com. https://www.military.com/military-fitness/sit-ups-crunches-planks-knee-ups-evolution-core-fitness-testingVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 64 Training After 40 How to Adapt, Stay Fast, and Beat Your Younger Self 🧬💬 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 idea that athletic performance has a biological expiration date is a myth, born from an era when a 40-year-old man could be arrested for jogging. This episode dismantles that myth with a deep dive into the science of the masters athlete. We reveal why the accepted 10-12% per decade decline in VO₂max is not inevitable; lifelong training can cut this rate in half by preserving stroke volume and oxygen extraction, even as maximal heart rate falls. You will learn the hard science behind "anabolic resistance"—the reason your muscles no longer respond to the same protein dose as a 20-year-old—and discover the elevated "Leucine Trigger" (3-4g per meal) required to activate the mTORC1 pathway for muscle repair. We also explore the neurological basis of sarcopenia, showing how heavy resistance training is the only proven method to prevent the denervation of fast-twitch (Type II) fibers and preserve your speed. This is your blueprint for longevity: learn the precise protein dose (35-40g per meal) to overcome metabolic blunting, why you must shift from Pyramidal to Polarized training to manage delayed autonomic recovery, and why popular longevity drugs like Metformin can actively sabotage your gains by blunting exercise adaptations.Keywords: masters athlete, aging, vo₂max, anabolic resistance, leucine trigger, type ii fibers, metformin, polarized training, menopause🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Rogers, M. A., Hagberg, J. M., Martin, W. H., Ehsani, A. A., & Holloszy, J. O. (1990). Decline in VO₂max with aging in master athletes and sedentary men. *Journal of Applied Physiology, 68*(5), 2195-2199. https://journals.physiology.org/doi/pdf/10.1152/jappl.1990.68.5.2195Church, D. D., Hoffman, J. R., Mangine, G. T., Stout, J. R., & Fukuda, D. H. (2022). Protein Requirements for Master Athletes: Just Older Versions of Their Younger Selves. *PMC*. https://pmc.ncbi.nlm.nih.gov/articles/PMC8566396/Sjögren, T., et al. (2023). The impact of life-long strength versus endurance training on muscle fiber morphology and phenotype composition in older men. *Journal of Applied Physiology*. https://journals.physiology.org/doi/abs/10.1152/japplphysiol.00208.2023Walton, R. G., et al. (2019). Metformin blunts muscle hypertrophy in response to progressive resistance exercise training in older adults: A randomized, double‐blind, placebo‐controlled, multicenter trial. *PMC*. https://pmc.ncbi.nlm.nih.gov/articles/PMC6826125/Alfredson, H., Pietilä, T., Jonsson, P., & Lorentzon, R. (1998). Heavy-load eccentric calf muscle training for the treatment of chronic Achilles tendinosis. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/9617396/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 63 Pain Tolerance Can You Train Your Brain to Suffer More? 🧠💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: Why can elite athletes suffer so much more than the rest of us? The answer isn't deadened nerves. New meta-analyses confirm athletes feel pain at almost the exact same moment as sedentary individuals. The difference lies in the brain. This episode unpacks the neurobiology of suffering, revealing how endurance training physically hypertrophies the Anterior Midcingulate Cortex (aMCC)—your brain's "engine of tenacity"—and builds hyper-efficient functional connectivity networks to process noxious signals without emotional distress. We explore how the SCN9A gene sets your genetic pain baseline, but how the "Athlete Effect" allows dedicated training to epigenetically override a "weak" genetic hand. We also dissect the academic war between the Central Governor Model (a subconscious protector) and the Psychobiological Model (a conscious choice to quit) to explain why you really stop. Finally, we translate this science into a practical blueprint. Learn how to implement Brain Endurance Training (BET)—a protocol proven to increase time-to-exhaustion by over 100%—by strategically combining cognitive tasks with your physical workouts to lower your perception of effort. You'll also learn the critical dangers of using NSAIDs to mask pain, a common practice that can lead to severe kidney injury.Keywords: pain tolerance, endurance, neuroscience, brain endurance training, amcc, scn9a, central governor model, psychobiological model, rpe🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Neural mechanisms of pain processing differ between endurance athletes and nonathletes: A functional connectivity magnetic resonance imaging study. (PMC). Retrieved from https://pmc.ncbi.nlm.nih.gov/articles/PMC8596969/SCN9A rs6746030 Polymorphism and Pain Perception in Combat Athletes and Non ... (PMC). Retrieved from https://pmc.ncbi.nlm.nih.gov/articles/PMC10048703/Considerations for the Use of Brain Endurance Training in Elite Sport: A Narrative Review. (PMC). Retrieved from https://pmc.ncbi.nlm.nih.gov/articles/PMC12895142/Do we really need a central governor to explain brain regulation of exercise performance? (ResearchGate). Retrieved from https://www.researchgate.net/publication/5232727_Do_we_really_need_a_central_governor_to_explain_brain_regulation_of_exercise_performanceAthletes and Experimental Pain: A Systematic Review and Meta-Analysis. (PubMed). Retrieved from https://pubmed.ncbi.nlm.nih.gov/38154623/The Tenacious Brain: How the Anterior Mid-Cingulate Contributes to Achieving Goals. (PMC). Retrieved from https://pmc.ncbi.nlm.nih.gov/articles/PMC7381101/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 62 Poles (Bâtons) Cheating or Essential Efficiency Tool? 🏔️💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: With the Western States 100 finally lifting its decades-long ban, the debate is over: poles are a core tool for ultra-endurance. But how do they actually work? This episode dismantles one of the biggest paradoxes in sports science: how a tool that increases your total oxygen consumption (VO₂) and heart rate can simultaneously *lower* your perceived effort (RPE). We explore the neurophysiology of the "RPE Paradox" through Corollary Discharge Theory, revealing how your brain is tricked into feeling less fatigue by distributing motor commands across four limbs instead of two. We then separate the systemic cardiovascular tax from the peripheral muscular reward, showing how poles preserve your leg muscles by offloading tons of cumulative impact force over a 100-mile race. Finally, we provide a practical blueprint for transforming from a bipedal runner to an efficient quadruped. You'll learn the physics of swing weight (why carbon is non-negotiable for racing), how to size your poles using the 90-degree rule, and the precise gradient (around 26%) where deploying them shifts from a metabolic penalty to a race-saving advantage.Keywords: trail running, ultramarathon, trekking poles, running economy, biomechanics, rpe, corollary discharge theory, vo₂, endurance, western states 100🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Giovanelli, N., et al. (2025). The impact of pole use on vertical cost of transport and foot force during uphill treadmill walking before and after a simulated trail running competition. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/40622586/Pellegrini, B., et al. (2023). A Review of Biomechanical and Physiological Effects of Using Poles in Sports. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/37106684/Schwameder, H., et al. (2000). Knee joint forces during downhill walking with hiking poles. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/10622357/Peyrot, N., et al. (2008). Effects of hiking pole inertia on energy and muscular costs during uphill walking. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/18460993/Carmichael, C. (2026). The Science Behind Using Trekking Poles in Trail and Ultrarunning. *TrainRight*. https://trainright.com/science-trekking-poles-trail-running-ultrarunning/Western States 100 will now allow trekking poles and traction spikes. (2025). *Canadian Running Magazine*. https://runningmagazine.ca/trail-running/western-states-100-will-now-allow-trekking-poles-and-microspikes/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 61 Should You Train Sick? The Viral Illness Trap That Can Hit Your Heart 🫀💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Just months after his legendary victory at Paris-Roubaix, pro cyclist Sonny Colbrelli collapsed from cardiac arrest at a finish line. The likely trigger? A respiratory infection he thought he had recovered from. This episode dissects the lethal synergy between exercise and viral illness, revealing how common viruses deploy a molecular guillotine—an enzyme called protease 2A—that cleaves dystrophin, the protein scaffolding of your heart cells. The autonomic stress from intense exercise also triggers mitochondrial fission, a cellular state that viruses hijack to replicate faster, turning your own physiology against you and seeding permanent, arrhythmogenic scar tissue. Learn the evidence-based protocols to protect your heart, from the simple "Neck Check" rule to the latest 2024/2025 AHA/ACC guidelines that dictate when you must rest, when to seek "Triad Testing" (ECG, Troponin, Echo), and why you must avoid NSAIDs that mask the systemic warning signs of a dangerous infection.Keywords: myocarditis, training sick, sudden cardiac death, athlete heart, coxsackievirus, return to play, neck check, cardiology, sonny colbrelli🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Badorff, C., Lee, G. H., Lamphear, B. J., Martone, M. E., Campbell, K. P., Rhoads, R. E., & Knowlton, K. U. (1999). Enteroviral protease 2A cleaves dystrophin: evidence of cytoskeletal disruption in an acquired cardiomyopathy. Nature Medicine, 5(3), 320–326. https://doi.org/10.1038/6543Eichner, E. R. (1993). Infection, immunity, and exercise: what to tell patients. The Physician and Sportsmedicine, 21(1), 125-135.Gatmaitan, B. G., Chason, J. L., & Lerner, A. M. (1970). Augmentation of the virulence of murine coxsackie-virus B-3 myocardiopathy by exercise. Journal of Experimental Medicine, 131(6), 1121-1136.O'Connor, F. G., et al. (2025). AHA/ACC Scientific Statement on Sports Participation for Athletes with Cardiovascular Abnormalities. Circulation.Petek, B. J., et al. (2023). Sudden Cardiac Death in National Collegiate Athletic Association Athletes: A 20-Year Study. Circulation, 149(2), 80-90. https://doi.org/10.1161/CIRCULATIONAHA.123.065908Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 60 Massage Guns, Cupping, Cryo Inside the Pro Athlete's Recovery Toolbox 🏋️💬 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 Michael Phelps’ iconic bruises to the power-tool origins of the Theragun, we dissect the billion-dollar recovery industry. This episode goes beyond the marketing to reveal the hard science behind the pro athlete's toolbox. You'll learn why Whole-Body Cryotherapy is a "thermodynamic failure" for deep muscle recovery, creating a neurological illusion of relief while failing to cool the tissue that matters. We'll show you how aggressive cold therapy can actually sabotage your long-term muscle and strength gains by blunting the essential mTOR/p70S6K anabolic pathways—the "Interference Effect" in action. Conversely, we break down the real mechanisms of percussive massage: not "breaking up scar tissue," but altering fascial fluid viscosity (thixotropy) and using the Tonic Vibration Reflex to increase your range of motion without the force deficits of static stretching. We also debunk cupping, revealing its pain-relief effects as a neurological trick (Diffuse Noxious Inhibitory Controls) rather than structural repair, and explain why the color of the marks has nothing to do with "toxins." Finally, you get a practical blueprint: when to use these tools, why you must avoid cryo post-workout if hypertrophy is your goal, and the life-threatening reason you should never, ever use a massage gun on your neck.Keywords: recovery, percussive therapy, massage gun, cupping, cryotherapy, doms, hypertrophy, interference effect, sports science, placebo🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Jia, Y., Zhang, Z., & Wang, G. (2025). Effects of cupping therapy on chronic musculoskeletal pain and collateral problems: a systematic review and meta-analysis. *BMJ Open, 15*(5), e087340. https://bmjopen.bmj.com/content/bmjopen/15/5/e087340.full.pdfKonrad, A., Glashüttner, C., Reiner, M. M., Bernsteiner, D., & Tilp, M. (2020). The Acute Effects of a Percussive Massage Treatment with a Hypervolt Device on Plantar Flexor Muscles' Range of Motion and Performance. *Journal of Sports Science & Medicine, 19*(4), 690–694. https://pmc.ncbi.nlm.nih.gov/articles/PMC7675623/Roberts, L. A., Raastad, T., Markworth, J. F., Figueiredo, V. C., Egner, I. M., Shield, A., Cameron-Smith, D., Coombes, J. S., & Peake, J. M. (2015). Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training. *The Journal of Physiology, 593*(18), 4285–4301. https://pmc.ncbi.nlm.nih.gov/articles/PMC4594298/Sulkowski, A., & Dillard, J. (2022). Case Report: Vertebral Artery Dissection After Use of Handheld Massage Gun. *Clinical Practice and Cases in Emergency Medicine, 6*(2), 173–175. https://pmc.ncbi.nlm.nih.gov/articles/PMC9197740/Xiao, F., He, M., & Li, Y. (2024). Effects of cold water immersion vs body cryotherapy on delayed onset muscle soreness and jump performance following acute strenuous exercise in physically active participants: A systematic review and meta-analysis. *Medicine (Baltimore), 103*(25), e41578. https://pmc.ncbi.nlm.nih.gov/articles/PMC12851776/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 59 Sodium Bicarbonate The Kitchen Powder That Breaks PBs (Maurten System) 🧪💬 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 black market at the World Athletics Championships to the podium of UTMB, a simple kitchen powder is rewriting the limits of endurance. For decades, sodium bicarbonate's power was locked behind violent gastrointestinal side effects, even carrying a documented risk of gastric rupture. This episode deconstructs the hydrogel revolution that solved this problem. We explain the core physiology of extracellular buffering: how creating an alkaline 'sink' in your blood pulls fatigue-inducing hydrogen ions out of your muscles via MCT transporters, allowing you to push harder for longer. We also reveal the genetic lottery of the MCT1 polymorphism that determines if you're a responder and unpack the powerful placebo effect. Finally, you'll get the practical blueprint: the optimal 0.3 g/kg dose, the critical 90-120 minute timing protocol, and the absolute 'don'ts'—like never chewing the hydrogel and understanding the risks of the massive sodium load.Keywords: sodium bicarbonate, hydrogel, maurten, endurance, performance, extracellular buffering, acidosis, mct1, utmb, ergogenic aid🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Downs, C. R., & Stonebridge, P. A. (1989). Gastric rupture following ingestion of sodium bicarbonate. Scottish Medical Journal, 34(5), 534.Grgic, J., Pedisic, Z., Saunders, B., et al. (2021). International Society of Sports Nutrition position stand: sodium bicarbonate and exercise performance. Journal of the International Society of Sports Nutrition, 18(1), 54. https://doi.org/10.1186/s12970-021-00458-wMcClung, M., & Collins, D. (2007). “Because I know It will!”: Placebo Effects of an Ergogenic Aid on Athletic Performance. Journal of Sport & Exercise Psychology, 29(3), 382-394.Shannon, E. S., Regnier, A., Dobson, B., Yang, X., Sparks, S. A., & McNaughton, L. R. (2024). The effect of sodium bicarbonate mini-tablets ingested in a carbohydrate hydrogel system on 40 km cycling time trial performance and metabolism in trained male cyclists. European Journal of Applied Physiology, 124(12), 3671-3682. https://doi.org/10.1007/s00421-024-05567-3Wilkes, D., Gledhill, N., & Smyth, R. (1983). Effect of acute induced metabolic alkalosis on 800-m racing time. Medicine and Science in Sports and Exercise, 15(4), 277-280. https://doi.org/10.1249/00005768-198315040-00004Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

Episode 58 Beat the Heat Ice Vests, Slushies & The Science of Cooling Strategies 🧊💬 Got a question or feedback? Write us at: [email protected]☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: When the Paris 2024 Olympic committee designed an eco-friendly village without air conditioning, elite teams staged a "geothermal rebellion," importing their own AC units. This highlights a critical truth: in the battle against heat, thermoregulation is no longer a marginal gain but a survival mechanism. This episode dissects the science of acute cooling strategies for when the environment becomes uncompensable. We explore how to artificially expand your body's heat storage capacity by ingesting ice slurries, a technique that exploits the massive energy demand of the "latent heat of fusion" to create an internal heat sink. You'll learn about the body's biological radiators—specialized vascular networks (AVAs) in your palms—and the technology that uses a mild vacuum to extract heat at rates once thought impossible. We also decode the neurological illusion of L-menthol, which tricks your brain's TRPM8 receptors into feeling cool without actually changing your core temperature. Finally, we provide a practical blueprint, contrasting elite mixed-method protocols (ice vests + slurries) with accessible amateur adaptations, and detail the critical mistakes to avoid, from the "ice slurry evaporation paradox" to the catastrophic error of using perceptual cooling agents too early in a race.Keywords: thermoregulation, cooling strategies, heat stress, ice slurry, menthol, pre-cooling, per-cooling, ava cooling, endurance sports🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bongers, C. C. W. G., et al. (2015). *Precooling and Percooling (cooling during exercise) both improve performance in the heat: A Meta-Analytical Review*. https://researchonline.ljmu.ac.uk/id/eprint/2688/3/Manuscript_BJSM_REVIEW_COOLING_unmarked.pdfGrahn, D. A., Cao, V. H., & Heller, H. C. (2012). Work volume and strength training responses to resistive exercise improve with periodic heat extraction from the palm. *PubMed*. https://pubmed.ncbi.nlm.nih.gov/22076097/Jay, O., & Morris, N. B. (2018). Ice Slurry Ingestion Leads to a Lower Net Heat Loss during Exercise in the Heat. *ResearchGate*. https://www.researchgate.net/publication/280968571_Ice_Slurry_Ingestion_Leads_to_a_Lower_Net_Heat_Loss_during_Exercise_in_the_HeatSiegel, R., et al. (2010). Landmark study demonstrating ice slurry ingestion reduced pre-exercise core temperature by 0.66°C and increased run time to exhaustion by 19% by exploiting the latent heat of fusion.Stevens, C. J., et al. (2016). Running performance and thermal sensation in the heat are improved with menthol mouth rinse but not ice slurry ingestion. *Western Sydney University*. https://researchers.westernsydney.edu.au/en/publications/running-performance-and-thermal-sensation-in-the-heat-are-improve/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

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.