Biohacking While you’re obsessing over VO2 max and carbon-plated shoes, your internal organs are fighting a silent battle for survival that could end your race The explosion of trail running and ultramarathons has pushed thousands of amateur athletes to test their limits far beyond what was once thought possible. When we prep for a 100k , we usually focus on building “legs of steel,” massive lung capacity, and grit. Press enter or click to view image in full size Photo by Olivier Devillers on Unsplash However, there’s an invisible world fighting a silent battle every mile: your internal organs — specifically the gut and the kidneys . Understanding the physiology of extreme endurance isn’t just for “running nerds”; it’s the secret to faster recovery and long-term health. The Resource Triage: Blood Deserts the Gut During high-intensity effort , your heart has to make a choice: pump oxygen to the muscles to keep you moving or send blood to the skin to cool you down.…