Dr. Patrick Smith and Kolie sit down to discuss the athletic and coaching implications of Karl Friston's free energy principle of the brain, the right approach to bridge the gap between expectations and observable reality in training, and the right amount of sensitivity to this feedback. This dovetails with the appeal of quick fixes, miracle intervals, and silver bullet training principles. We also discuss what practical solutions are, setting yourself up for success, and your listener questions.

This episode investigates the scientific relationship between size and power (allometry), both vo2max and maximal strength and power, and what it can teach us about sound training methods. How do w/kg and w/CdA scale? Why can't gaining muscle add aerobic power? Why can FTP seem to drop when dieting? Why do we rebound from crash diets? Why do most Tour de France winners seem to fit a certain size and weight? We answer all these questions and more, plus your listener questions.

Does overtraining cause mitochondria to dysfunction? We look at data in the Flockhart study on excessive training and compare them to the headlines, a similar overtraining study using proteomics, and a published response to Flockhart. We break down mitochondrial function, what various measurement methods actually tell us, why your mitochondria are probably just fine, and why these studies raise more questions about mitochondria's role in overtraining (if any) than they answer. Finally, we answer your listener questions on the Flockhart study, mitochondrial function, and overtraining.

Kolie sits down with Cory Lockwood to discuss breaking the U.S. 40km ITT record, going under 45 minutes. Cory also talks about what's different working with Kolie from previous training he's done, along with observations about rest, FTP and VO2max training, training during race season, and reflections on what it means to be both an athlete and coach.

This episode answers the question: is there something unique about endurance riding that is unavailable at other intensities? After discussing "zone 2" definitions, we look at adaptations and dose relative to other training intensities, fatigue, and volume. We look at the relative necessity of endurance riding in both very low and high volume training, and answer listener questions, including if there's a lower limit for endurance pace.

Master coach and WKO5 product leader Tim Cusick joins the podcast to get his brain thoroughly picked. Training topics include the biggest differences between average cyclists and the top pros, the usual periodization schemes vs Olympic cycles, the evolutionary process of a training plan, expertise vs mastery, and of course, resting.

Data topics include whether we'll ever get the AI coach in our lifetimes and what it might do when it's here, what WKO5 is and isn't, the secrets of the PD model and mFTP, the PMC, TSS, training impact score, and the value of lab testing.

Tim also answers listener questions about how he prescribes training targets, low cadence training, youth development, and advice to get the most out of a coaching relationship.

To celebrate 400,000 podcast listens, we answer your questions submitted in the Empirical Cycling Instagram stories. We discuss high and low volume training and progressive overload, 3 things every cyclist should do, low CHO training, FRC for mountain bikers, supplements for athletes, our best non-empirical cycling advice, and much more. The full questions list is available on the website.

This episode breaks down the origins of endurance performance and how cells control substrate oxidation. We review a paper looking at the difference in adaptive aerobic signals when participants used significantly different amounts of fat and carbs at the same intensity. We then look at the role of mitochondria in cellular energetics, the pivotal role they play in aerobic endurance adaptations, and finally what the training implications are. Plus we answer your listener questions submitted to Kolie's Instagram.

Are you a CTL junkie? Terrified of letting it drop? Listen in. This episode takes a critical but realistic look at TSS and the metrics it's built on like CTL, ATL, and TSB. We discuss normalized power, what kind of fitness CTL can actually reflect, and answer listener questions.

Andy Coggan joins the podcast again to discuss everything we didn't get to in the previous episode. We get back stories behind the adaptations by training zones chart and the category and w/kg chart. We also go in depth with nitrate supplementation, vo2max training. if burning fat makes you burn more fat, if signaling studies translate to performance, and the nature of adaptation itself. There are plenty of pithy proverbs along the way.