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LACTATE

🎙️ Lactate, the podcast that deciphers science to improve your performance. Endurance, nutrition, training, recovery – each episode gives you science-based insights to understand, improve, and perform. Voices generated by artificial intelligence from the scientific report produced by the Lactate team.
💬 Got a question or feedback? Write us at: lactatesports@gmail.com
☕ Buy a Gel Caf for Lactate to support the work:⁠ https://ko-fi.com/lactate⁠⁠⁠⁠

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  • S2 · E95
    Friday · 21 min

    Episode 95 [SCIENCE VS MYTH #13] What Your Sweat Really Says About Your Effort 💦

    Episode 95 [SCIENCE VS MYTH #13] What Your Sweat Really Says About Your Effort 💦💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Is sweating profusely a sign that you're out of shape? Can a wearable sensor really measure your muscular fatigue by analyzing your sweat? This episode dismantles the biggest myths surrounding perspiration. We deconstruct the eccrine sweat gland, revealing it as an independent metabolic engine, not a passive filter of blood. You'll learn the two-step physiological process that creates sweat, why the lactate in your sweat is generated by the gland itself (and is not a proxy for muscle fatigue), and how your sweat glands become more efficient with training. We also explore the groundbreaking science of sweat as an immunological barrier through the antimicrobial peptide Dermcidin, and its validated role as an adjunctive pathway for heavy metal detoxification. From a practical standpoint, you will understand how elite athletes can use sweat ammonia levels to track glycogen depletion and how to correctly interpret sweat sodium data, while avoiding the common pitfalls of new biosensor technology. This is the definitive guide to what your sweat truly reveals about your physiology.Keywords:sweat, physiology, eccrine gland, lactate, hydration, thermoregulation, dermcidin, detoxification, wearable sensors, heat acclimation🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Baker, L. B., & Wolfe, A. S. (2020). Physiological mechanisms determining eccrine sweat composition. European Journal of Applied Physiology, 120(4), 719-752. DOI: 10.1007/s00421-020-04323-7.Gao, W., Emaminejad, S., Nyein, H. Y. Y., Challa, S., Chen, K., Peck, A., Fahad, H. M., Ota, H., Shiraki, H., Kiriya, D., Lien, D. H., Brooks, G. A., Davis, R. W., & Javey, A. (2016). Fully integrated wearable sensor arrays for multiplexed in situ sweat analysis. Nature, 529(7587), 509-514. DOI: 10.1038/nature16521.Périard, J. D., Racinais, S., & Sawka, M. N. (2015). Adaptations and mechanisms of human heat acclimation: Applications for competitive athletes and sports. Scandinavian Journal of Medicine & Science in Sports, 25(Suppl 1), 20-38. DOI: 10.1111/sms.12408.Sato, K. (1977). The physiology, pharmacology, and biochemistry of the eccrine sweat gland. Reviews of Physiology, Biochemistry and Pharmacology, 79, 51-131. DOI: 10.1007/BFb0037089.Schittek, B., Hipfel, R., Sauer, B., Huber, R., Gilges, D., Witte, K., Karl, S., & Garbe, C. (2001). Dermcidin: a novel human antibiotic peptide secreted by sweat glands. Nature Immunology, 2(12), 1133-1137. DOI: 10.1038/ni732.Sears, M. E., Kerr, K. J., & Bray, R. I. (2012). Arsenic, cadmium, lead, and mercury in sweat: a systematic review. Journal of Environmental and Public Health, 2012, 184745. DOI: 10.1155/2012/184745.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E94
    Tuesday · 17 min

    Episode 94 [MARATHON] What to Really Do in the 24 Hours After the Finish 🔋

    Episode 94 [MARATHON] What to Really Do in the 24 Hours After the Finish 🔋💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:You’ve crossed the finish line, but the real battle has just begun. The 24 hours after a marathon aren't for simple rest; they represent a period of profound multi-system trauma. This episode dissects the acute physiological crisis your body enters, providing an essential guide for your post-marathon recovery. We explore the four distinct phases of trauma: the immediate risk of hemodynamic collapse from muscle pump failure, the gut’s ischemic-reperfusion injury that leads to systemic endotoxemia (“leaky gut”), the autonomic struggle causing sympathetic overdrive and poor sleep, and the peak inflammatory cascade. We reveal why Acute Kidney Injury (AKI) is the norm—even if you hydrated perfectly—and why your immune system enters a vulnerable “open window” due to a 50% drop in salivary IgA. Based on landmark data, we provide a non-negotiable blueprint for your post-marathon recovery. Learn why delaying carbohydrate intake by just two hours slashes your glycogen resynthesis rate by 45%, why you must keep walking post-finish to prevent collapse, and why reaching for NSAIDs is one of the worst mistakes you can make. This is your essential guide to navigating the critical first day of post-marathon recovery and stabilizing your body after the ultimate endurance test.Keywords: post-marathon recovery, marathon, exercise-associated collapse, glycogen resynthesis, acute kidney injury, doms, splanchnic ischemia, sports nutrition, immunology🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Aengevaeren, V. L., et al. (2020). Exercise-induced cardiac troponin I release and incident cardiovascular disease. Journal of the American College of Cardiology. DOI: 10.1016/j.jacc.2019.09.020Areces, F., et al. (2025). Changes in blood and urine-based biomarkers of organ stress/injury and hydration before and after the 2024 Boston Marathon. Journal of Applied Physiology. DOI: 10.1152/japplphysiol.00775.2025Asplund, C., O'Connor, F., & Noakes, T. (2011). Exercise-associated collapse: an evidence-based review and primer for clinicians. British Journal of Sports Medicine. DOI: 10.1136/bjsports-2011-090378Ivy, J. L., et al. (1988). Muscle glycogen synthesis after exercise: effect of time of carbohydrate ingestion. Journal of Applied Physiology. DOI: 10.1152/jappl.1988.64.4.1480Nieman, D. C., et al. (2006). Relationship between salivary IgA secretion and upper respiratory tract infection following a 160-km race. Journal of Sports Medicine and Physical Fitness. PMID: 17131612Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E93
    October 9 · 9 min

    Episode 93 [INCREDIBLE] Does Giving Blood Really Slow You Down? 🩸

    Episode 93 [INCREDIBLE] Does Giving Blood Really Slow You Down? 🩸💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: It's a life-saving act of altruism, but for an athlete, a standard whole blood donation is a self-inflicted hemorrhagic trauma. This episode dissects the unassailable science behind why giving blood immediately compromises your performance. We explore the direct 7-10% drop in VO₂max, a mathematical certainty driven by reduced hemoglobin mass and compromised cardiac output via the Frank-Starling mechanism. You'll learn the critical difference between whole blood donation, which cripples your aerobic engine, and plasma donation (plasmapheresis), which temporarily guts your anaerobic buffering capacity. We then provide a practical blueprint for navigating blood donation: for elite athletes, we cover WADA regulations and the Athlete Biological Passport (ABP). For all athletes, we detail the optimal timing (off-season), the 3-to-6-week recovery timeline for red blood cells, and how low-dose iron supplementation—validated by the landmark REDS-II trial—is the key to accelerating your return to full strength.Keywords: blood donation, vo₂max, athletic performance, hemoglobin, erythropoiesis, iron supplementation, plasma donation, endurance training, wada, sports science🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Johnson, D. M., Roberts, J., & Gordon, D. (2019). The acute effects of whole blood donation on cardiorespiratory and haematological factors in exercise: A systematic review. *PLoS ONE, 14*(4), e0215346. DOI: 10.1371/journal.pone.0215346Hill, D. W., Vingren, J. L., & Burdette, S. D. (2013). Effect of plasma donation and blood donation on aerobic and anaerobic responses in exhaustive, severe-intensity exercise. *Applied Physiology, Nutrition, and Metabolism, 38*(5), 551-557. DOI: 10.1139/apnm-2012-0361Kiss, J. E., Brambilla, D., Glynn, S. A., Mast, A. E., Spencer, B. R., Stone, M., ... & NHLBI Retrovirus Epidemiology Donor Study-II (REDS-II). (2015). Oral iron supplementation after blood donation: a randomized clinical trial. *JAMA, 313*(6), 575-583. DOI: 10.1001/jama.2015.119Houser, A. P., Soto, M. A., Bell, K., & Schilling, B. K. (2025). Effect of Fresh Whole Blood Donation on Human Performance in United States Special Forces. *Journal of Special Operations Medicine* (Advanced online publication). PMID: 39718388Ekblom, B., Goldbarg, A. N., & Gullbring, B. (1972). Response to exercise after blood loss and reinfusion. *Journal of Applied Physiology, 33*(2), 175-180. DOI: 10.1152/jappl.1972.33.2.175Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E92
    October 6 · 18 min

    Episode 92 [MARATHON] The Week That Can Ruin (or Save) Your Race 🏁

    Episode 92 [MARATHON] The Week That Can Ruin (or Save) Your Race 🏁💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:The final seven days before your marathon are the most volatile biological window of your entire training cycle. This episode dismantles the myths of "taper madness" and the "loss of fitness" fallacy, revealing that a proper race week is not passive rest but an aggressive period of cellular remodeling. We explore the hard science, including how your fast-twitch (MHC IIa) muscle fibers can increase their peak power by 2.5-fold, creating a crucial reserve tank for the final kilometers. You will learn how to monitor your autonomic nervous system's parasympathetic rebound using Heart Rate Variability (HRV) and why the 7-day rolling average of your LnRMSSD is a critical indicator of readiness. We provide an actionable blueprint for your race week, explaining why you must drop training volume by 41-60% while maintaining intensity, and how to use "neuromuscular priming" to arrive at the start line with peak neural activation, not feeling flat.Keywords: race week, marathon, tapering, hrv, muscle fiber, mhc iia, glycogen, neuromuscular priming, parasympathetic rebound, vo₂max🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bosquet, L., Montpetit, J., Arvisais, D., & Mujika, I. (2007). Effects of tapering on performance: a meta-analysis. Medicine and Science in Sports and Exercise. DOI: 10.1249/mss.0b013e31806010e0Mujika, I., & Padilla, S. (2003). Scientific bases for precompetition tapering strategies. Medicine and Science in Sports and Exercise. DOI: 10.1249/01.MSS.0000074448.73931.11Plews, D. J., Laursen, P. B., Stanley, J., Kilding, A. E., & Buchheit, M. (2013). Training adaptation and heart rate variability in elite endurance athletes: opening the door to effective monitoring. Sports Medicine. DOI: 10.1007/s40279-013-0071-8Plews, D. J., Laursen, P. B., Kilding, A. E., & Buchheit, M. (2013). Evaluating training adaptation with heart-rate measures: a methodological comparison. International Journal of Sports Physiology and Performance. PMID: 23479420Trappe, S., Costill, D., & Thomas, R. (2000). Effect of swim taper on whole muscle and single muscle fiber contractile properties. Medicine and Science in Sports and Exercise. PMID: 11128843Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E91
    October 2 · 18 min

    Episode 91 [SCIENCE VS MYTH #12] Are Ice Baths Sabotaging Your Gains? 🧊

    Episode 91 [SCIENCE VS MYTH #12] Are Ice Baths Sabotaging Your Gains? 🧊💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:You feel invincible after an ice bath, but are you secretly killing your muscle growth? This episode dismantles the popular myth that feeling recovered equals optimal adaptation. We expose the "dopamine deception"—the euphoric rush that masks a physiological catastrophe for anyone training for hypertrophy. Based on landmark studies, we reveal how cold water immersion (CWI) orchestrates a three-pronged attack on your gains: it triggers "hemodynamic strangulation" that starves muscles of amino acids, it suppresses the master growth pathway mTORC1, and it arrests the satellite cells essential for muscle fiber expansion. The data is clear: routine post-lifting ice baths can slash muscle mass gains by up to 66%. We provide a definitive blueprint on when to use CWI as a strategic tool for tournament survival and why you must avoid it during strength and hypertrophy phases, making it clear that for building muscle, ice baths are a critical mistake.Keywords:ice baths, cold water immersion, muscle growth, hypertrophy, recovery, mtorc1, satellite cells, resistance training, sports science🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :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. DOI: 10.1113/JP270570Piñero, A., Burke, R., Augustin, F., Mohan, A. E., DeJesus, K., Sapuppo, M., Weisenthal, M., Coleman, M., Androulakis‐Korakakis, P., Grgic, J., Swinton, P. A., & Schoenfeld, B. J. (2024). Throwing cold water on muscle growth: A systematic review with meta‐analysis of the effects of postexercise cold water immersion on resistance training‐induced hypertrophy. European Journal of Sport Science, 24(2), 177–189. DOI: 10.1002/ejsc.12074Fuchs, C. J., Kouw, I. W. K., Churchward-Venne, T. A., Smeets, J. S. J., Senden, J. M., Lichtenbelt, W. D. v. M., Verdijk, L. B., & van Loon, L. J. C. (2020). Post-exercise cooling impairs muscle protein synthesis rates in recreational athletes. The Journal of Physiology, 598(4), 755–772. DOI: 10.1113/JP278996Malta, E. S., Dutra, Y. M., Broatch, J. R., Barroso, R., & Zagatto, A. M. (2021). The Effects of Regular Cold-Water Immersion Use on Training-Induced Changes in Exercise Performance and Physiology: A Systematic Review with Meta-Analysis. Sports Medicine, 51(1), 161–174. DOI: 10.1007/s40279-020-01362-0Figueiredo, V. C., Roberts, L. A., Markworth, J. F., Fallahi, A. A., Kruse, P. N., Clarke, A. K., Peake, J. M., Cameron-Smith, D., & Raastad, T. (2016). Impact of resistance exercise on ribosome biogenesis is acutely regulated by post-exercise recovery strategies. Physiological Reports, 4(2), e12670. PMID: 26823337Peake, J. M., Roberts, L. A., Figueiredo, V. C., Egner, I., Krog, S., Aas, S. N., Suzuki, K., Markworth, J. F., Coombes, J. S., Cameron-Smith, D., & Raastad, T. (2017). The effects of cold water immersion and active recovery on inflammation and cell stress responses in human skeletal muscle after resistance exercise. The Journal of Physiology, 595(3), 695–711. DOI: 10.1113/JP272881Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E90
    September 29 · 19 min

    Episode 90 [MARATHON] The Pacing Mistake That Blows Up 9 Runners Out of 10 💥

    Episode 90 [MARATHON] The Pacing Mistake That Blows Up 9 Runners Out of 10 💥💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:That feeling of starting a marathon too fast is a universal trap, but the physiological cost is far greater than you imagine. This episode dismantles the single biggest marathon pacing mistake: starting even slightly too fast triggers a "supralinear" consumption of your precious glycogen stores. We explain how this recruits fast-twitch muscle fibers that act as glycogen devourers, overwhelming your cellular transport system (the MCT transporters). This chemical bottleneck signals your brain's "Central Governor," which pre-emptively reduces power to your legs to prevent catastrophic failure—this is the real "wall." We provide three science-backed, actionable strategies to perfect your marathon pacing: embrace a strict even-pacing strategy, leverage new continuous lactate biosensors to monitor your effort in real-time, and understand why total passive recovery is scientifically superior to a "cool-down" run for refueling your muscles.Keywords: marathon pacing, hitting the wall, glycogen, central governor, lactate threshold, even pacing, running science, endurance training🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Volejníková, J., Bunc, V., & Tlustý, P. (2021). How recreational marathon runners hit the wall: A large-scale data analysis of late-race pacing collapse in the marathon. *Journal of Human Sport and Exercise*, 16(4proc), S1887-S1901. https://www.researchgate.net/publication/351724031_How_recreational_marathon_runners_hit_the_wall_A_large-scale_data_analysis_of_late-race_pacing_collapse_in_the_marathonPacing strategy patterns and performance outcomes in marathon. (n.d.). *PLOS ONE*. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0352808Noakes, T. D., St Clair Gibson, A., & Lambert, E. V. (2005). From catastrophe to complexity: a novel model of integrative central neural regulation of effort and fatigue during exercise in humans: summary and conclusions. *British Journal of Sports Medicine*, 39(2), 120–124. https://pmc.ncbi.nlm.nih.gov/articles/PMC2564297/Brooks, G. A. (2018). The Science and Translation of Lactate Shuttle Theory. *Cell Metabolism*, 27(4), 757–785. https://pubmed.ncbi.nlm.nih.gov/29617642/Patsnap. (n.d.). *Continuous Lactate Monitoring Wearable Patch — 2026*. Retrieved from https://www.patsnap.com/resources/blog/rd-blog/continuous-lactate-monitoring-wearable-patch-2026/Choi, D., Cole, K., Goodpaster, B. H., Fink, W. J., & Costill, D. L. (1994). Effect of passive and active recovery on the resynthesis of muscle glycogen. *Medicine and Science in Sports and Exercise*, 26(8), 992–996. https://pubmed.ncbi.nlm.nih.gov/7968434/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E89
    September 25 · 21 min

    Episode 89 [INCREDIBLE] Why Your Heart Rate Has Been Lying to You All Along 🫀

    Episode 89 [INCREDIBLE] Why Your Heart Rate Has Been Lying to You All Along 🫀💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:You trust your watch to guide your training, but what if its core metric—your heart rate—is fundamentally flawed? This episode dismantles the four lies of heart rate monitoring. We expose the hardware failures of optical sensors, from "cadence lock" confusing your step rate with your pulse to signal loss from cold or skin pigmentation. We then dissect the biological deceptions, revealing how cardiovascular drift means a higher heart rate can signal reduced efficiency, not increased effort. We uncover the autonomic paradox where elite athletes in a state of overtraining show deceptively "healthy" recovery metrics, and we demolish the mathematical myth of the "220-minus-age" formula, a non-scientific rule with a massive margin of error. Stop letting a flawed number dictate your training. Learn why a chest strap is superior, how to perform a field test to find your true zones, and why perceived exertion is often the most honest guide to your real-time intensity.Keywords: heart rate, optical sensor, ppg, cardiovascular drift, 220-minus-age, cadence lock, training zones, overtraining, sports science, wearable technology🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bent, B., Goldstein, B.A., Kibbe, W.A., & Dunn, J.P. (2020). Investigating sources of inaccuracy in wearable optical heart rate sensors. *NPJ Digital Medicine, 3*, 18. DOI: 10.1038/s41746-020-0226-6Coyle, E.F., & González-Alonso, J. (2001). Cardiovascular drift during prolonged exercise: new perspectives. *Exercise and Sport Sciences Reviews, 29*(2), 88-92. DOI: 10.1097/00003677-200104000-00009Gillinov, S. et al. (2017). Variable accuracy of wearable heart rate monitors during aerobic exercise. *Medicine & Science in Sports & Exercise, 49*(8), 1697-1703. DOI: 10.1249/MSS.0000000000001284Le Meur, Y., Pichon, A. et al. (2013). Evidence of Parasympathetic Hyperactivity in Functionally Overreached Athletes. *Medicine & Science in Sports & Exercise, 45*(11), 2061–2071. DOI: 10.1249/MSS.0b013e3182980125Robergs, R. A., & Landwehr, R. (2002). The surprising history of the "HRmax=220-age" equation. *Journal of Exercise Physiology Online, 5*(2), 1-10.Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E88
    September 22 · 22 min

    Episode 88 [MARATHON] 12 Weeks to Prep Your Marathon (Without Burning Out) 📅

    Episode 88 [MARATHON] 12 Weeks to Prep Your Marathon (Without Burning Out) 📅💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary:Why do up to 40% of runners get injured during their marathon prep, despite having more data than ever from wearable tech? This episode dismantles the myths of modern training. We reveal the hard biological truth: your tendons and ligaments require a strict minimum of 12 weeks to remodel, a timeline dictated by the slow kinetics of collagen synthesis. This process demands a 24-48 hour recovery window after mechanical loading, a fact that most training plans ignore. We also expose how the popular Acute:Chronic Workload Ratio (ACWR) used in many smartwatches is a statistically flawed metric, offering injury prediction no better than a coin toss. Learn why the "10% rule" is obsolete and how running fewer than 4 days a week can paradoxically make you more resilient. This is your practical blueprint for a 12-week marathon prep that prioritizes structural integrity over flawed algorithms, ensuring you reach the starting line strong and uninjured.Keywords:marathon prep, running injury, collagen synthesis, overtraining, acute:chronic workload ratio, acwr, tendon adaptation, load management🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Bohm, S., Mersmann, F., & Arampatzis, A. (2015). Human tendon adaptation in response to mechanical loading: a systematic review and meta-analysis of exercise intervention studies on healthy adults. *Sports Medicine - Open*, *1*(1), 7. https://pmc.ncbi.nlm.nih.gov/articles/PMC4532714/Impellizzeri, F. M., Tenan, M., & Marcora, S. M. (2020). Acute:Chronic Workload Ratio: Conceptual Issues and Fundamental Pitfalls. *International Journal of Sports Physiology and Performance*, *15*(7), 1040-1045. https://pubmed.ncbi.nlm.nih.gov/32502973/Kjaer, M., Langberg, H., Heinemeier, K., Bayer, M. L., Hansen, M., Holm, L., Doessing, S., Kongsgaard, M., Krogsgaard, M. R., & Magnusson, S. P. (2006). From mechanical loading to collagen synthesis, structural changes and function in human tendon. *Scandinavian Journal of Medicine & Science in Sports*, *16*(Suppl 1), 8-17. https://pmc.ncbi.nlm.nih.gov/articles/PMC2100210/Meeusen, R., Duclos, M., Foster, C., Fry, A., Gleeson, M., Nieman, D., Raglin, J., Rietjens, G., Steinacker, J., & Urhausen, A. (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 and Science in Sports and Exercise*, *45*(1), 186-205. https://pubmed.ncbi.nlm.nih.gov/23247672/Nielsen, R. O., Nohr, E. A., Rasmussen, S., & Sørensen, H. (2012). Weekly running volume and risk of running-related injuries among marathon runners. *International Journal of Sports Physical Therapy*, *7*(3), 258–268. https://pmc.ncbi.nlm.nih.gov/articles/PMC3625790/Toresdahl, B. G., McElheny, K., Metzl, J., Ammerman, B., Chang, B., & Kinderknecht, J. (2020). Training Patterns Associated With Injuries in Marathon Runners: A Prospective Cohort Study. *Sports Health*, *13*(3), 241-246. https://pubmed.ncbi.nlm.nih.gov/33750264/Voices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E87
    September 18 · 20 min

    Episode 87 [SCIENCE VS MYTH #11] The Fat-Burning Zone: Cardio's Biggest Myth? 🔥

    Episode 87 [SCIENCE VS MYTH #11] The Fat-Burning Zone: Cardio's Biggest Myth? 🔥💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ Buy a Gel Caf for Lactate to support the work: ko-fi.com/lactateSummary: The "fat-burning zone" displayed on every treadmill promises optimal fat loss, but is it a physiological fallacy built on flawed math? This episode dismantles the commercial myth by diving deep into the science of substrate oxidation. You'll learn the critical difference between burning a high *percentage* of fat versus burning the highest *absolute amount* of fat—a concept defined by your unique Maximal Fat Oxidation (MFO) point, or FATmax. We explore the "Crossover Concept," revealing the precise biochemical bottlenecks, like CPT-1 inhibition, that shut down fat metabolism at high intensities. Discover why the infamous "220-minus-age" formula is scientifically invalid and why High-Intensity Interval Training (HIIT) consistently leads to greater fat loss than steady-state cardio in the supposed fat-burning zone. Whether you're an elite athlete trying to spare glycogen or a time-crunched amateur aiming for body composition changes, this guide provides actionable protocols to train smarter, moving beyond the myth of the fat-burning zone and toward true metabolic efficiency. Understanding the real fat-burning zone is key to unlocking your potential.Keywords: fat-burning zone, maximal fat oxidation, fatmax, crossover concept, hiit, epoc, substrate oxidation, exercise physiology, metabolic flexibility🎙️ Lactate, the podcast that deciphers science to improve your performance.Key references :Romijn, J. A., Coyle, E. F., Sidossis, L. S., Gastaldelli, A., Horowitz, J. F., Endert, E., & Wolfe, R. R. (1993). Regulation of endogenous fat and carbohydrate metabolism in relation to exercise intensity and duration. *American Journal of Physiology-Endocrinology and Metabolism*, 265(3), E380-E391. https://www.researchgate.net/publication/14985327_Regulation_of_endogenous_fat_and_carbohydrate_metabolism_in_relation_to_exercise_intensity_and_durationBrooks, G. A., & Mercier, J. (1994). Balance of carbohydrate and lipid utilization during exercise: the 'crossover' concept. *Journal of Applied Physiology*, 76(6), 2253-2261. https://www.researchgate.net/publication/15270081_Balance_of_carbohydrate_and_lipid_utilization_during_exercise_The_'crossover'_conceptAchten, J., Gleeson, M., & Jeukendrup, A. E. (2002). Determination of the exercise intensity that elicits maximal fat oxidation. *Medicine & Science in Sports & Exercise*, 34(1), 92-97. https://www.researchgate.net/publication/9026407_Maximal_Fat_Oxidation_During_Exercise_in_Trained_MenVenables, M. C., Achten, J., & Jeukendrup, A. E. (2005). Determinants of fat oxidation during exercise in healthy men and women: a cross-sectional study. *Journal of Applied Physiology*, 98(1), 160-167. https://pubmed.ncbi.nlm.nih.gov/15333616/Viana, R. B., Naves, J. P. A., Coswig, V. S., de Lira, C. A. B., Steele, J., Fisher, J. P., & Gentil, P. (2019). Is interval training the magic bullet for fat loss? A systematic review and meta-analysis comparing moderate-intensity continuous training with high-intensity interval training (HIIT). *British Journal of Sports Medicine*, 53(10), 655-664. https://www.researchgate.net/publication/331126194_Is_interval_training_the_magic_bullet_for_fat_loss_A_systematic_review_and_meta-analysis_comparing_moderate-intensity_continuous_training_with_high-intensity_interval_training_HIITVoices generated by artificial intelligence from the scientific report produced by the Lactate team.

  • S2 · E86
    September 15 · 20 min

    Episode 86 [DECODED] Running Power: The Metric That Changes Everything? ⚡

    Episode 86 [DECODED] Running Power: The Metric That Changes Everything? ⚡💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S2 · E85
    September 11 · 24 min

    Episode 85 [INCREDIBLE] Will the 2-Hour Marathon Barrier Finally Fall? ⏱️

    Episode 85 [INCREDIBLE] Will the 2-Hour Marathon Barrier Finally Fall? ⏱️💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S2 · E84
    September 8 · 26 min

    Episode 84 [DECODED] Zone 2: Are You Doing Too Much, or Not Enough? 🎯

    Episode 84 [DECODED] Zone 2: Are You Doing Too Much, or Not Enough? 🎯💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S2 · E83
    September 4 · 18 min

    Episode 83 [SCIENCE VS MYTH #10] What Lactate Really Does to Your Muscles 💪

    Episode 83 [SCIENCE VS MYTH #10] What Lactate Really Does to Your Muscles 💪💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S2 · E82
    September 2 · 24 min

    Episode 82 [SEASON 2] What We Learned in S1 (And Why S2 Changes Everything) 🚀

    Episode 82 [SEASON 2] What We Learned in S1 (And Why S2 Changes Everything) 🚀💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S1 · E81
    July 25 · 20 min

    Episode 81 Blueprint 2027: The Future of Science and Extreme Athletic Optimization 🚀 

    Episode 81 Blueprint 2027: The Future of Science and Extreme Athletic Optimization 🚀 💬 Got a question or feedback? Write us at: lactatesports@gmail.com ☕ 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.

  • S1 · E80
    July 24 · 16 min

    Episode 80 The Lactate Awards: Debunking the 5 Biggest Sports Physiology Myths 🏆 

    Episode 80 The Lactate Awards: Debunking the 5 Biggest Sports Physiology Myths 🏆 💬 Got a question or feedback? Write us at: lactatesports@gmail.com ☕ 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.

  • S1 · E79
    July 21 · 23 min

    Episode 79 Off-Season Strategy How to Rest Without Getting Fat or Slow 🧬

    Episode 79 Off-Season Strategy How to Rest Without Getting Fat or Slow 🧬💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S1 · E78
    July 17 · 23 min

    Episode 78 The Running Injury Repair Manual Fixing the "Big 4" Without Stopping 🏃

    Episode 78 The Running Injury Repair Manual Fixing the "Big 4" Without Stopping 🏃💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S1 · E77
    July 14 · 22 min

    Episode 77 [IRONMAN NUTRITION SPECIAL] Fueling for a 10+ Hour Race 🏊‍♂️

    Episode 77 [IRONMAN NUTRITION SPECIAL] Fueling for a 10+ Hour Race 🏊‍♂️💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

  • S1 · E76
    July 10 · 18 min

    Episode 76 [UTMB PREP #2] Hallucinations & Nightmares When the Brain Breaks 🧠

    Episode 76 [UTMB PREP #2] Hallucinations & Nightmares When the Brain Breaks 🧠💬 Got a question or feedback? Write us at: lactatesports@gmail.com☕ 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.

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