Each week, I ask a question about a common running science myth. Answer correctly and you'll be entered into the weekly raffle.
For a typical runner, at what long-run duration does carb fueling during the run start to meaningfully affect next-day recovery and performance?
Tap your answer to lock it in.
A. 45 minutes — any aerobic session burns enough glycogen to warrant fuel ⏱️🍯
B. 60 minutes — anything shorter and you’re fine on water alone ⏰💧
C. 90 minutes — the classic “bonk line” where glycogen depletion starts to bite 🚫🥖
D. 2 hours — below that, fat oxidation covers everything you need 🔥⚡
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