How far can the human body run with absolutely no fuel?
In this endurance experiment, Mark sets out to find the answer. With no gels, no energy bars, and only water for hydration, he runs with one simple goal: to keep going until he physically can’t anymore.
This is a real-time test of the body’s glycogen stores and a look at what "hitting the wall" truly feels like.
Follow along as Mark pushes his limits, battles cravings, and discovers just how far he can get on an empty tank.
00:00 – Introduction
00:35 – The Challenge Rules
01:25 – Fast Start | Early Miles
02:45 – 10K In | No Light at the End of the Tunnel
03:33 – Cravings Begin | Food on the Mind
05:48 – Half Marathon Mark | Pace Check
07:02 – 30K In | Things Get Serious
07:42 – Dizzy Spells Explained | Glycogen Depletion
08:29 – 34K In | No Walking Rule Hits Hard
11:27 – 39K In | Cramps & Blurry Vision
12:32 – The Finish Line | Final Pace Check
13:08 – Post-Run Burger & Reflections
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What’s the toughest running challenge you’ve ever faced, and what kept you going when you wanted to quit? Share your stories in the comments!
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