Episode 26 : Swimming: The Science of Speed & Hydrodynamics 🏊

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