Some Work, All Play

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 be full of oxygen, powering performance in all conditions. We try to take a "...

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 great topics! Other topics: the announcement of an Unbreakable 2 documentary heading...

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 just as much about nourishing and protecting the brain as it is the legs.

And this on...

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. And when you F around...sometimes you find out.

We hope that you feel a connection ...

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 system.

And this episode was jam-packed with tons of amazing topics and questions! Other to...

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 after exercise, framed around a pro triathlete recently announcing that they had high he...

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 training. It shows that heat-induced adaptations and fitness improvements seem to mimi...

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? It's true that you probably don't want to be slurping a gel at 3 PM for...

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 athletes can train and adapt across all endurance sports. We break down the shifts...

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 for cyclists! We talked about our evolving feelings on strength training, why we enc...

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, your team down by 2, everyone counting on you. Pressure is fun!

The big sc...

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 moments. This one is a JOURNEY.

Topics this week: the “Trial by Miles” video, going to dar...

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 uncomfortable to disagree in this way, but we think it’s important for the health an...

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 lives have changed, and what's ahead. Shooters shoot.

Next it was a "No Secrets" Q+A! To...

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 can start to outline the most direct way to make running faster (and more fun).

The ...

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 drift tests to estimate zone 2, how to pace ultras, why we think 2025 will be the year o...

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 all levels, our favorite speed workouts to gauge progress over time, incorporating ...

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 speed interventions with real-world implications.

We also answered listener question...

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 volume year-round in a sustainable way. Then it was onto the questions!

Topics of t...