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Human Performance Outliers Podcast with Zach Bitter

Aug 28, 2026

Dr. Trent Stellingwerff joined the show to discuss the topic of relative energy deficiency syndrome (REDs) in endurance athletes, and body competition management. Trent includes working with the Women’s Health, Sport & Performance Institute (WHSP) in Boston Trent is the Chief Performance Officer (CPO) at the...


Aug 24, 2026

Mark Dowdle arrives 15 minutes before the start of Last Soul Ultra, but still wins with nearly 400 miles. Should we have more unsupported ultra running events? Badwater 135 lack of streaming and interesting shoe policy. Jeff Garmire joins me to discuss and share his upcoming documentary.

Jeff Garmire: freeoutside.com |...


Aug 20, 2026

Matt Fox joined me to chat about his interest in the marathon after coming from a National class middle distance background, his trajectory with content creation, the Chinese running shoe market, and his power weight ratio journey. 

Matt Fox: sweatelite.co | IG: @mattinglisfox

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Aug 13, 2026

I reached the end of my journey with the blood clot I discovered at the end of June. I learned a lot through the process, along with information about my personal risk for blood clotting. I unpack all of that and share my return to training. 

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Aug 7, 2026

Vic Johnson shares the practical limits of high-carb strategies, discusses how carbohydrate needs can exceed what the gut can absorb, especially under heat and high intensity. Vic shares typical successful ranges, why hotter races and faster pacing worsen digestion, and emphasizes consistent intake over large boluses...