We conquered the WOOHOO yips before this amazing episode! The main science topic was on a new study that examined the causes of injuries in a 5205-athlete sample. The headline finding was relatively intuitive, but the sub-finding was so shocking that we are still picking our jaws up off the floor. We break it down and discuss how it may clarify tra…

We luxuriated in vending machine cookies before this great episode! We started by talking about Megan's first race in 1.5 years. She HAD A DAY, and we share a celebration of the winding road to get here. We also talked about the USA Track Championships, which might have been the most surprising (and drama-filled) track meet we have ever seen. There…

We gathered up some spicy questions for this amazing episode! It's in the "no secrets" style, where we leave nothing behind the curtain. Prepare for some fun! Topics this week: post-race fitness bumps, the central governor, creatine supplementation, adapting the 12-week pro marathon plan, what fueling options to buy with $100, the intensity distrib…

We went face-first into a quart of ice cream before this amazing episode! The main science topic was a new study on microintervals, finding that 4-10 second high-power bursts led to no more metabolic stress than very easy training, but with way more muscular work. That could lay the groundwork for revolutionary studies and theories in the future! W…

We sat down gingerly on bruised glutes before this awesome episode! The main topic was on fueling data coming out of the Tour de France. High carb is ubiquitous in the cycling peloton. We use some of that information as a jumping-off-point to think about fueling for all athletes! This one also came with stories from our first (and possibly last) gr…

We buzzed over our favorite study tables of all time before this great episode! The main science topic was a review of "speed endurance" studies showing rapid progress across all populations and protocols. That replicability is almost unheard of in sports science, and it's something that every athlete should harness in their training. Spoiler alert…

Western States 100 ended in a DNF at mile 62. It’s partially the normal story of a race that didn’t go to plan due to simple errors with hydration leading to a cascade of physical issues. But it’s also a lot more complex than that, like life is always more complex than the simple narratives. This episode tries to share the complex story while it’s …

We're here! It's race week for the Western States 100. This episode talks through how we're feeling before the moonshot. Hopefully there are helpful similarities to all of the big, scary things in your lives! We also break down a new study that feels like the Manhattan Project of sports science, testing "replicability" in the field. You know it's s…

Our favorite episodes involve answering listener questions in a "no secrets" style. That means we might be right, we might be wrong, but we'll always be honest (and hairy!). We started with a game theory analysis on how we think this year's Western States 100 will play out. This is the type of conversation that athletes have before every race, but …

This episode was such a fun mix of science, emotions, and hot tubs that could cook a turkey! We started with some thoughts on Western States, less than 3 weeks out from the race. Does embracing the stage also mean embracing social media posts telling you that you aren’t being picked to perform well? Our argument channeling Tyrese Halliburton of the…

We gulped down some pungent juice before recording this amazing episode! The main topics were the two big pieces of news: Jim Walsmley won't be racing Western States, and Kilian Jornet is making training videos now. Jim is the GOAT and we gave him an 85% chance of winning just last week. He's the supermassive black hole at the center of the Western…

This episode was a total joy with toe warmers in all the right places (and some of the wrong ones)! The main scientific topic was a new study on how high carb fueling may improve heat adaptation. We broaden that out to a question from a listener on the old "calories-in, calories-out" framework, and why that doesn't apply to athletes from evolutiona…

We had a ridiculous amount of fun recording this episode! The main science topic was on a new pre-print study on post-exercise ketones, showing higher carb storage and lower glycemia in athletes taking them. Is it possible that high carb has a special interaction with post-exercise ketones that might be at the heart of recent performances? It's unc…

Endurance sports are in the midst of a revolution that will change everything about what we think humans can do. This week at the Quad Rock 50 Mile, we felt it firsthand. David set a 14-minute course record at this classic, steep Colorado race. We break it all down, "no secrets" style. Topics: high-carb fueling, big hydration totals, why heat train…

Our favorite episodes are these Q+As where we answer listener questions on all of the hottest topics! It's called a "No Secrets" Q+A because we try to take you behind the curtain, speculating about ideas that might not be talked about in public very often. Let's get spicy! The main topic was Cam Wurf's reported 200 grams of carbs per hour at Ironma…

We put on our space cowboy outfits for this great episode! The main topic centered on the almost-ubiquitous use of higher carb intakes in recent races, from the Canyons 100k to the Boston Marathon to the cycling classics. What once seemed optional is now mandatory. Where do the next breakthroughs come from? We outline some ideas to try to catch the…

Our minds were blown by the Boston Marathon right before recording this great episode! The main topic was a new study on the Puma R3 super-shoe, conducted by a top researcher. It showed a shocking 3% improvement in running economy relative to the previous generation of super-shoes, with a universally positive response among study participants. We d…

We put sensors in all the right places before this HOT episode! The main discussion was on the emerging science of heat training, centered around a 2025 study that showed 3 x weekly sessions could sustain hematological adaptations from an altitude camp. Heat training is no longer just about being ready for hot weather. It's about helping our blood …

We put on our finest white spandex for this amazing episode! The main topic was a new review study on protein needs for endurance athletes. The authors used a cool method of isotope labeling to argue that endurance athletes need more protein than traditional recommendations. The nutrition revolution is not just about carbs! And this one was full of…

We pondered the genetics of smelling ants before this great episode! The main topic was a new study that found the brain may use myelin lipids for fuel during low glucose conditions like marathons. This could have massive implications for how we think about fueling and fatigue resistance, including for cognitive function. Our big theory: fueling is…

We took off our armor for this incredible episode! The main discussion might have been one of our most important (and fun) ever: the Big Alta 50k DNF, failure, and what it truly means to go for it. David raced Big Alta because it was somewhere that he couldn't hide. We needed to gather data about what happened at the very edge of human capabilities…

We celebrated the 250th recording for this great episode! The main topic was a new study on fatigue resistance. How do you actually improve performance after multiple hours of work? It’s the greatest mystery of endurance, and whoever solves it will have a big advantage. We think that we have some answers for training, fueling, and the nervous syste…

We lifted some styrofoam plates painted like metal before this great episode! The main topic was a new study showing improved fatigue resistance for athletes doing heavy lifting twice per week. Yes... we regret to inform you that we think you should probably have a squat rack nearby. Prepare your butts. We also answered a question on carb intake af…

We brought some very sore legs into this great episode! The main topic was a new study on "Zone 2 Training," which gathered a panel of experts to review what Zone 2 means and why it matters. Our theory is that Zone 2 training is interacting with high-carb fueling to drive some of the performance revolution! We also talked about a new study on heat …

We put on some supershoes for an extra boost for this great episode! A main topic was a question we get a lot: whether high-carb fueling during training is healthy in a broader sense. We not only think it's healthy, we think that the question is best asked another way: how much healthier is fueling your training than the alternative of underfueling…

We bought stock in baking soda before this record-breaking episode! It was a "No Secrets" Q+A, where we lay it all on the line. This one was so fun! The first big question was on the deluge of world records set in the last week. Our theory is that compound gains are being harnessed from nutrition, supplements, and shoes that are changing how athlet…

Our minds were blown this weekend as more records were annihilated on the trails (at the Black Canyon 100k) and the track (at the Millrose Games)! We talk about The Performance Revolution: what's causing it, what we all can learn, and what comes next. The future is here. And the future is wildly fast! Next up was a new study on strength training fo…

We embraced the pressure for 2025 before recording this great episode! A concept we disagree with is that "pressure will break down the mind," referring to saying big, scary goals out loud. Our main idea: pressure is a joyful part of sports. We talk about our long journey to get to this point, and why you should want the ball with time running out,…

This episode is one of our all-time favorites, diving into tons of the most important (and most frivolous) topics! As always, it’s in the “no secrets” style, where we lift the curtain and show you what people are thinking at the top end of endurance sports, but might not want to say publicly. Plus, there were so many laughs mixed with serious momen…

This episode was so fun, and it wasn’t just the cinnamon rolls we used for carb research. The main topic was a new study that took a cool design and extended the conclusions beyond their reach, theorizing that athletes should reconsider high-carb approaches for peak performance. We outline where we think the conclusions missed the mark. It makes us…

We brought so much gratitude to this amazing episode! The main topic was the news announced this weekend: David's Leadville 100 performance won the International Trail Performance of the Year. Yes, tears were shed. To everyone who listens, THANK YOU. In ways that go deeper than words...thank you. We reflect on the training, the journey, how our liv…

The best moment of our lives happened last week. It's not the baby. It's a social media mention from the GOAT Kilian Jornet. And we brought that celebration energy to this awesome episode! The main study was on the types of training that leads to faster marathon times, looking at 150,000 datapoints. With findings that overlap with other studies, we…

We got some very surprising news before recording this celebration episode! This one has it all: complicated training questions, predictions for the future, and a stunning twist to start the episode (and we were in for a lot more stunning twists after we recorded). The questions from podcast listeners were on tons of amazing topics: heart rate drif…

We celebrated a wild year with a "No Secrets" Q+A episode! This one is full of fascinating topics, mixing science, theory, and hot takes into the perfect holiday stew. The questions all came from podcast listeners on the following topics: how to think about gut training, Zone 2 heart rate and how terrible some online calculators are for athletes of…

We bowed down to the power of hot mugwort before this amazing episode! The main topic was on a study that may be the long-lost "missing link" in our training theory. It took 12 elite endurance runners and had them do sprints of 100 meters and 400 meters, along with a VO2 max test. Their findings (and one striking non-finding) may connect studies on…

We collected some wonderful questions before this great episode! It's our classic "no secrets" style, where we take you behind the scenes to combine research and theory with what athletes are actually doing, but maybe not talking about. We started with a new study on maintaining heat acclimation, which helps answer questions on how to improve blood…

We got our Rich Roll on before this amazing episode! David's appearance on the Rich Roll Podcast came out this week, and we started with some takeaways from a surreal experience. We then pivot into some talk on protein in adaptation and recovery. When in doubt, the answer for us is often to throw some protein on it. Next was a truly wild study that…

We brought some joyful and fluid-tastic vibes to this great episode! The main topic involved us picking our jaws off the floor as records were absolutely annihilated at the JFK 50 Mile, America's oldest ultramarathon. We have some inside info on how David Sinclair set the record, which we think could be Ultra Performance of the Year. Plus we worshi…

You can smell the excitement on this amazing episode! The main training topic was on David's favorite study of 2024, which caused major changes in his training approach. The study found some potential mechanisms for improved fatigue resistance, but we take it a step further into theories about solving for a puzzle that has flummoxed coaches and res…

We celebrated huge beating genius machines before this awesome episode! The main training topic was on 10 ways our training approaches changed for Leadville and Javelina. Throughout the process of preparing for 100 miles, we made itty bitty alterations that sometimes became big shifts in how our plans usually look. We break down each of them and ho…

We answered tons of amazing listener questions on this great episode! We approached Leadville and Javelina like science experiments, and like all good science experiments, we want to share everything before starting a new experiment for the Western States 100. This one is full of sexy science, theory, psychology, nutrition, and so much more! Our ph…

We ventured into the unknown at the Javelina 100 Mile, and we're coming back with a celebration to share! This episode is all about processing a life-changing weekend where David won Javelina in 12 hours, 45 minutes to earn a Golden Ticket to the Western States 100. There was one defining feature of the day: HEAT. Race day featured record temperatu…

We reached deep into the BELIEVE BAG before this great episode! It started out with all of our thoughts ahead of the Javelina 100 Miler this weekend. This journey into the unknown has it all: fears, dread, and doubt right alongside excitement, celebration, and DMX. We hope this exploration gives you a tailwind that pushes you to chase scary dreams.…

We put on all of our pants and jackets to record this HOT episode! The main training topic is on the wild science of heat suit training. In 2021, a case study revealed that simply wearing a couple layers while doing easy biking could rapidly expand hemoglobin mass, which could improve performance in all conditions. Numerous other studies support th…

We made loud grunting noises to celebrate recording this great episode! A primary training discussion was on putting the finishing touches on the quick build for the Javelina 100 Miler. It's getting very, very real. Confidence is rising, and falling, and falling some more, then rising again. We bring you into the process to feel just how hard it al…

We loaded up on some "awake" tea to feel extra caffeinated for this spicy episode! Listeners send in such great questions, and it was so fun to get down and dirty with some fascinating topics. It's called a "no secrets" Q+A because we often see conversations with elite athletes and coaches where it's clear that we aren't getting the full picture. O…

We marveled at the athletic performance of the year to prepare for this great episode! It kicked off with us picking our jaws up off the floor, in awe of Tara Dower's overall record on the Appalachian Trail. Coach Megan delves into what made it possible (strides and speed) and what sets Tara apart (being a superhero). This achievement will take dec…

We slurped down a truly inspiring amount of carbohydrates before recording this great episode! The main topic was a new study with a fascinating design, equalizing carb intake across a day, but modulating the quantity consumed in the post-exercise window. There were major changes in next-day performance! Training can often be an adaptation contest,…

We filled the pauses in conversation with all of our deepest confessions before recording this great episode! A main topic was how we thought about strength work and heat training in the Leadville 100 build. While David's mileage wasn't wildly high, he made some big changes in the last year that harness the power of heat to spur hematological chang…

We put lubrication in all the right places before this amazing episode! The main topic was a rundown of our big takeaways from the UTMB races, the most important week of the trail running year. Times get faster and faster... but carnage comes with it. We talk about how the fueling revolution may be impacting races, both in terms of speed and GI iss…