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305. The Theory of Downhills for Strength and Speed, AM v. PM Training Study, Bicarb Poisoning on Mt. Everest, and Moon Shots!
We listened to a troubling amount of Noah Kahan music before this great episode! The main topic outlined our theory on using downhill training for strength and speed. The repeated bout effect from downhill-induced eccentric muscle contracti
304. The Art of Steady Running, Pregnancy and Sponsorships, A Shocking TUE Dashboard, Heat and Heart Rate, Post-Exercise Ketones, and Bicarb!
We imagined doing PG-13 things to a very tasty gel before this great episode! The main training topic was a discussion of steady running. Lots of theory talks about “hard days hard and easy days easy.” But we think there’s a place for an ad
303. The Weird Science of Carb Mouth Rinses, VO2 Max Limits, Fueling for Performance, Cross Training, and Cramp Prevention!
We put on our spacesuits for this great episode! The main topic was a study finding that just putting a dissolvable carb strip on the tongue could improve performance by 3% in a short time trial. What?! How can carb strips and mouth rinses
302. Mailbag Episode! The Fastest Shoe, Our Dream Study, Improving Testosterone Levels, Heat Training, Upper Body Lifting, and Lots More
We wore the best shoe ever before this mailbag episode! We opened it up to listener questions, diving into tons of tricky and fun topics. Topics this week: David’s first run in the shoe that’s changing road running, our eventful weekend, Om
301. What To Do Pre-Race, How Metabolism Works For Athletes, Training Races, Colon Health for Runners, and a Great US Half Marathon Update!
We stocked up on neck floaties before this great episode! The main topic was a discussion of the constrained total energy expenditure model, which argues that physical activity will often have a smaller impact on energy expenditure than pre
300. A Shocking Disgrace at the US Half Marathon Champs and What Needs To Happen Next, Learning From Elite Cycling Training, and Optimism Science!
We're doing our first early-release episode to talk about the shocking ending of the US Half Marathon Championships on Sunday. As Jess McClain was charging to victory, with Emma Grace Hurley and Ednah Kurgat poised to make Team USA with her
299. The Best Underdog Story, LT1 v. LT2 workouts, 3 Tips for Health, Science on Supershoes and Slower Paces, and Structuring Training Weeks!
We washed all of our bowls THOROUGHLY before this great episode! A main topic was the story of US Ski Mountaineering at the Olympics, where Cam Smith and Anna Gibson had miraculous performances. 50 years from now, people will still be talki
298. Ultra Training Philosophy, What Shorter Distances Can Learn from Ultras, Black Canyon 100k Records, a Weird Brain Study, and Metabolic Flexibility!
We put our hands down our pants (for warmth) before this amazing episode! The main topic revolved around the Black Canyon 100k, where Jenn Lichter and Hans Troyer set course records, and the ultrarunning took another major leap forward. We
297. Long Runs Explained, The Training Shoe We Love, Black Canyon 100k Predictions, Shockwave Therapy, and Lindsey Vonn’s Courage!
Real talk! This episode is great, but maybe don’t listen out loud IN PUBLIC. The main training topic was a deep dive on long runs. We break down some of the competing long run theories, and how they fit into performance. The discussion ends
296. How To Use Electrolytes, Zone 2 Problems, Strange VO2 Max Measures, The Weird World of Probiotics, and AI Training Thoughts!
We cornered the market on mozzarella sticks before this awesome episode! The main topic involved our recommendations for electrolyte use in races and hard training. Sweat replacement is one of the strangest, least understood parts of athlet
295. Debunking Low Carb Science for Endurance Athletes
We ordered extra-extra cheese before this deep-dive episode. The main topic took up most of the recording today, involving a new narrative review that argues for a low-carb approach for endurance athletes. The real-world performance benefit
294. The Bicarb Revolution, Theory of Doubles, Vitamin D Supplementation, Stairmill Training, and Zone 2 Weirdness!
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
293. Ultra Runner of the Year Rankings, Unintentional Low Carb Studies, Health Update, Continuous Lactate Monitors, and Blood Tests!
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
292. The Countdown! Our 10 Most Important Training Studies of the Year
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 h
291. The Top 40 Predictions and Hot Takes for 2026!
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 sh
290. No-Secrets Q+A on Running Form, Heat Training, Uphill Treadmill, Supplement Hypotheticals, Bicarb v. Nomio, Power Meters, and More!
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
289. Threshold Training Explained, How To Run Strides, VO2 and Longevity, and The Best Story We Have Ever Told!
We are still recovering from the laughs at the end of this episode! Before getting to that story, this one had a great training discussion on improving threshold performance. We dug down into why it’s more complex than just doing threshold
288. New Study on Kilian Jornet, The Incredible Story of US Skimo, Shoe Review Rant, VO2 Max, and “Hot Girl Sweating”
We had one of the most fun sports-watching weekends of our lives before this great episode! The main science topic was a new study on Kilian Jornet at Western States, breaking down his fueling, the metabolic demand, and lots more. Kilian is
287. Quad Dipsea Course Record! “No Secrets” on Megan’s Racing, Training, and Postpartum Journey
On Saturday, Megan broke a 15-year-old course record at Quad Dipsea! This episode shares everything about the journey in a “no secrets” style. The record was set by Caren Spore in 2010, back when Megan was playing field hockey and her bigge
286. Why Passive Heat May Improve Performance, A Batman Study, Influencers, JFK 50 Mile, and Cool Persistence Hunting Science!
We got way too invested in dog food models before this amazing episode! The main topic was a new study on passive heat training (like the hot tub or sauna) that acts as a missing link between theory and real-world proof. The study found tha
285. The Strange Uncertainty of Hemoglobin A1c in Athletes, Thyroid Function and Fueling, Elevated Heart Rate, and Running Form 101!
We thought deeply about the societal implications of Paw Patrol before this amazing episode! The main science discussion involved a pair of strange, counter-intuitive wrinkles of physiology. The first was the sometimes paradoxical finding o
284. Game-Changing Study on High Carb, Iron Levels and Energy Intake, New World Records, Race Week Nutrition, and Offseasons!
We chocolatized our life before this amazing episode! The main topic was a new study on elite marathoners measuring responses to different carb intakes, finding a 2.6% lower oxygen cost at 120 grams per hour compared to 60 grams per hour. I
283. Fatigue Resistance in Marathons, High Carb in Road Racing, Science Debate on Ketones, Doubles, and Uphill Treadmill Introduction!
We stretched the ketones-as-robot-butt metaphor to its limits for this awesome episode! The main topic was a new study measuring fatigue resistance in marathons. Athletes completed lab tests prior to a marathon, with final results correlati
282. Javelina 100! Golden Ticket Back to Western States...With A Twist Ending
This weekend, we stepped into the fire at the Javelina 100 Mile to chase a golden ticket back to the Western States 100. This episode is the full story of the race, which ended with a golden ticket in 2nd place (behind Will Murray’s astound
281. The Facts on Lead in Protein Powder, 22 Hot Topics in Endurance Sports, Weird Science of MRI Findings, and Increasing Carbs!
We loved recording this episode! The main topic was the article that rocked the athletic world last week, which asserted that many protein powders had unsafe amounts of lead contamination. We broke down the numbers to reach a much more nuan
280. Science of Energy Availability and Adaptation, “Just Say No To Rhabdo” Runs, Hot Takes on Poles and Active Heat Training, and the Evolution of Taper Theory!
We had so much fun with this episode (probably because it was a break from potty training)! The main topic was a study that found a correlation between energy availability and performance across a season in collegiate runners. It was a powe
279. Strava v. Garmin Lawsuit, Uphill Treadmill Threshold, New Study on Low Carb v. High Carb (and Caffeine), and Max Heart Rate Problems!
We studied up on some beefs (Strava v. Garmin, Taylor v. Charli, pastrami v. sirloin) before this awesome episode! The main science topic was a new study evaluating low carb and high carb approaches, with and without caffeine. It’s another
278. The High-Carb Life, The Best Performances (of all time?) at World Champs, Vitamin D Intake Study, Strava’s IPO, and Short-Term Heat Acclimation!
Our watches gave us some harsh (but necessary) feedback before this amazing episode! The main science topics were quick hitter studies on massive one-time Vitamin D intake, short-term heat acclimation protocols, and sodium bicarb. If you co
Leadville 100 Documentary “Nothing To Lose” Commentary, Hot Takes, and Behind The Scenes!
The documentary “Nothing To Lose” is out today, telling the behind-the-scenes story of the 2025 Leadville 100! And we thought it was a great time to try something new. In this episode, we do a rewatch, providing commentary and hot takes thr
277. New Science on Fatigue Resistance, Leadville 100 Documentary, Our Fears About The Enhanced Games, A Cross Training Guide, and Timing of Strides!
We had such a blast recording this great episode! The main science topic was a new study on improving fatigue resistance, which performance-matched athletes with different training approaches to see what led to better outcomes. The conclusi
