Some Work, All Play

We loaded up on Vitamin D (and deodorant) before this fresh episode! The main topic was a new sodium bicarbonate study, tracking 40k bike time trial performance at altitude. It’s another brick in a really big scientific wall supporting the use of bicarb for performance. We zoom out to let you know why we think it’s also effective even in very long distances... and maybe at lower (cheaper) doses.
We also talked about Vitamin D supplementation, using a big review study showing that over half of athletes had inadequate levels. Hit the ADEQUATE sign!
And this one was full of great topics! Other topics: the power of taking 3 days off, an update on David’s health journey, arm band heart rate, our Nomio epiphany, shoe nerd news, a new analysis on running economy changes in different trail shoes, the Hopecore Corner with pieces of art we really like, a quick-hitter CBD study, improving bike power, the theory of doubles, a fun sports bra question, using the stairmill, heart rate zones, and whether to follow logic or the heart with race decisions.
We love you all! HUZZAH!
-David and Megan
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We got our big juicy pumps for this amazing episode! We started by talking about a couple pieces of personal news, including a shockingly cool number 4 ranking in the Ultra Runner of the Year voting... and some tough health findings from an MRI. The newest shoe review is a medical boot. It’s still better than most trail shoes.
The big science discussion was on a pair of studies on advanced female runners, with both finding low carbohydrate intake on training days. One of the studies on elite athletes found that 94.3% had low energy availability! We broaden out the discussion into nutritional approaches generally. And David tries to broaden it out into a thinkpiece about the food pyramid. At a certain point, maybe your thinkpiece is so wrong that you eventually loop around and become right? Don't answer that.
And this one was full of great topics! Other topics: our approach to training and health with the foot, a study on using heat training to substitute for other types of training, what we’d spend with $200 a month, how we are making money off AI, the Burrito League, some quick thoughts on continuous lactate monitors, Shelby Houlihan and Molly Seidel setting records at trail races, Raya for trail and ultra runners, sleep and FKTs, blood tests and training for downhills in a flat place.
We love you all! HUZZAH!
-David and Megan
Click "Claim Your Sponsorship" for $40 free credit at The Feed here: thefeed.com/swap
Buy Janji's amazing gear: https://janji.com (code "SWAP")
The Wahoo KICKR Run is the best treadmill on the market: https://www.wahoofitness.com/devices/running/treadmills/kickr-run-buy (code “SWAP”)
Athlete Blood Test (code "SWAP"): https://www.athletebloodtest.com/shop/
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This was one of our all-time favorite episodes! We discussed takeaways from our 10 top endurance performance and health studies of 2025, full of science, recommendations, and debates. 
We don’t want to give away the countdown, but this one had everything! We’re talking fueling, training, brain health, colon health, and shoes. You just know there had to be a shoe study. Running shoes are 92% of David’s personality. 
Our mission was to summarize the science in a way that would help you take the research into the real world. We think that if you can stay 1-2 years ahead of widespread adoption of new scientific principles, you can always have an edge even as the world starts to catch up. Plus, it’s fun! Not as fun as a colonoscopy, but still fun!
We also talked about 3 pieces of running news, including Shelby Houlihan’s first trail race, a new bicarb energy bar, and Ann Trason’s 100 mile performance. 
We love you all! HUZZAH!
-David and Megan
Click "Claim Your Sponsorship" for $40 free credit at The Feed here: thefeed.com/swap
Buy Janji's amazing gear: https://janji.com (code "SWAP")
The Wahoo KICKR Run is the best treadmill on the market: https://www.wahoofitness.com/devices/running/treadmills/kickr-run-buy (code “SWAP”)
For training plans, weekly bonus podcasts, articles, and videos: patreon.com/swap

This episode is full of the biggest predictions and most fun hot takes! We gathered 40 deep thoughts from listeners, and we had a blast responding to them all.
Topics: just about everything related to running and endurance! We’re talking shoes, races, technology, media, training, strength work, culture, thermometers in sensitive places, and so much more.
Thank you for being here for an incredible and unpredictable year. We love you all! HUZZAH!
-David and Megan
Click "Claim Your Sponsorship" for $40 free credit at The Feed here: thefeed.com/swap
25% sale on the Wahoo KICKR Run, the best treadmill on the market: ⁠https://www.wahoofitness.com/devices/running/treadmills/kickr-run-buy⁠ (code “SWAP”)
Buy Janji's amazing gear: https://janji.com (code "SWAP")
For training plans, weekly bonus podcasts, articles, and videos: patreon.com/swap

We realized the perils of a hurricane-force tailwind before this amazing holiday episode! To celebrate the season, we opened up the mailbag to answer listener questions on all sorts of topics.
Topics this week: what we’d save from a fire, a hot-tub experiment follow-up, Megan’s exciting news, whether we’d ever try triathlon, a vest that ejects gels, heat training submersion levels, hemoglobin A1C and REDs, iron supplementation, uphill treadmill effort and timing, scheduling rest days, a supplement hypothetical, Nomio v. sodium bicarbonate, cycling metrics, running power meters, running form changes, tart cherry juice hacks, training on a through-hike, limiting aid station support, and a beautiful listener corner message.
Thank you so much for being here in 2025! May your holidays be like the water in our hot tub: ELECTRIC.
We love you all! HUZZAH!
-David and Megan
Get 40% off your first order and $10 credit for every $100 spent at The Feed here: thefeed.com/swap
Buy Janji's amazing gear: https://janji.com (code "SWAP")
The Wahoo KICKR Run is the best treadmill on the market: https://www.wahoofitness.com/devices/running/treadmills/kickr-run-buy (code “SWAP”)
For training plans, weekly bonus podcasts, articles, and videos: patreon.com/swap