Episode 49: [PARIS MARATHON SPECIAL] The Ultimate D-2 Checklist 🔬

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.