Why Fueling Stops Working During Ultras

Why Fueling Stops Working During Ultras

From Borderlands Trail and Ultra Running by Josh Rosenthal | Ultra Runner

May 4, 2026 · 45 min · Season 1 · Episode 296

About this episode

This episode discusses the implications of high-carb fueling on ultra runners' health and performance with guest Chris Bellamy.

Ultra running nutrition is getting more extreme. More carbs, more precision, more pressure to “get it right.” But if you’ve ever had your stomach shut down mid-race, you know something isn’t adding up. This episode is for runners trying to fuel better without breaking their body in the process. I sit down with Chris Bellamy, engineer, ultra runner, and founder of Yanaa , to explore the hidden cost of the high-carb movement, what it’s doing to gut health, and why real food might be the missing piece. We get into the tension between performance and health, and what elite athletes are actually doing when it matters. This is for ultra runners who want to perform without sabotaging their system. Please give us a follow, rate the podcast, and give a review. If you’re new to Borderlands, start here . Resources / Links White Paper - From Health to Performance Salt Lake Foothills Trail Races Josh Rosenthal on IG Borderlands.cc La French Trail High Tones Subwhatever Related Episodes An Elite Coach Reframes Fueling for Ultrarunners Pre-Race Nutrition for Ultrarunners Nutrition Myths for Ultrarunners Presented by Kiprun . ---- Borderlands explores trail running through culture, media, and…

People in this episode

Host: Josh Rosenthal

Guest: Chris Bellamy

Topics covered

  • ultra running nutrition
  • high-carb fueling
  • gut health
  • performance vs health
  • real food

Keywords

  • ultra running
  • nutrition
  • high-carb
  • gut health
  • performance
  • real food
  • fueling

Mentioned in this episode

Organizations: Yanaa

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