Physiological profiling is often the missing link in amateur triathletes’ training programs. Knowing your profile on a scale from very endurance based (slow twitch phenotype) to very explosive (fast twitch phenotype) can help you avoid costly mistakes and break through plateaus in your triathlon training through better individualisation. In this episode, we discuss the ins and outs of this topic, from how to correctly profile an athlete without misinterpretation or overinterpretation, to important training implications for different athlete profiles. HIGHLIGHTS AND KEY TOPICS: What is physiological profiling? Different methods, including race performance assessments, power-duration curve, Critical Power testing, psychological factors, and more… What are the main differences between fast twitch dominant profiles and slow twitch dominant profiles, and why does it matter for your triathlon training program? Training implications for different profiles: intensity, volume, session structures, nutrition, rest within and between sessions, fatiguability, and more How to deal with different profiles in a group training setting Practical takehome messages that you can use to improve your triathlon training. DETAILED EPISODE SHOWNOTES: We have detailed shownotes for all of our episodes. The shownotes are basically the podcast episode in written form, that you can read in 5-10 minutes. They are not transcriptions, but they are also not just surface-level overviews. They provide detailed insights and timestamps for each episode, and are great especially for later review, after you've already listened to an episode. The shownotes for today's episode can be found at https://scientifictriathlon.com/tts687/ LINKS AND RESOURCES: Muscle fiber types, recovery and training adaptations, and overreaching with Phil Bellinger, PhD | EP#297 Estimating Muscle Fiber-Type Composition in Elite Athletes: A Survey on Current Practices and Perceived Merit - Lievens et al. 2024 Muscle fiber typology is associated with the incidence of overreaching in response to overload training - Bellinger et al. 2020 WHAT SHOULD I LISTEN TO NEXT? If you enjoyed this episode, I think you'll love the following related episodes: Musculoskeletal adaptations, “train low” strategies, and muscle fiber types with prof. John Hawley | EP#248 - John Hawley is a legend in the field of exercise physiology, so if you’re somebody who wants to soak up all the triathlon science you can, this episode will be right up your alley! Critical Power and VO2 kinetics with Mark Burnley, PhD | EP#257 - If you want to learn more about the science of Critical Power, and scientifically valid testing protocols, this is the episode to listen to. You can find our full episode archives here, where you can filter for categories such as Training, Racing, Science & Physiology, Swimming, Cycling, Running etc. You can also find separate archives for specific series of episodes I've done, specifically Q&A episodes, TTS Thursday episodes, and Beginner Tips episodes. LEARN MORE ABOUT SCIENTIFIC TRIATHLON: The Scientific Triathlon website is the home of That Triathlon Show and everything else that we do Contact us through our contact form or email me directly (note - email/contact form messages get responded to much more quickly than Instagram DMs) Subscribe to our Newsletter Follow us on Instagram Learn more about our coaching, training plans, and training camps. We have something to offer for everybody from beginners to professionals. HOW CAN I SUPPORT THAT TRIATHLON SHOW (FOR FREE)? I really appreciate you reading this and considering helping the show! If you love the show and want to support it to help ensure it sticks around, there are a few very simple things you can do, at no cost other than a minute of your time. Subscribe to the podcast in your podcast app to automatically get all new episodes as they are released. Tell your friends, internet and social media friends, acquaintances and triathlon frenemies about the podcast. Word of mouth is the best way to grow the podcast by far! Rate and review the podcast (ideally five stars of course!) in your podcast app of choice (Spotify and Apple Podcasts are the biggest and most important ones). Share episodes online and on social media. Share your favourite episodes in your Instagram stories, start a discussion about interesting episodes on forums, reference them in your blog or Substack. SPONSORS: Precision Fuel & Hydration produce our favourite gels, sports drinks, and electrolyte and carbohydrate products here at That Triathlon Show and Scientific Triathlon. Use the free Fuel & Hydration Planner to get a personalised plan for your carbohydrate, sodium and fluid intake in your next event, and get 15% off your first 2026 order by using the code TTS2026 at checkout. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.
