Nutrition
Marathon Fueling Mistake
A marathon fueling mistake is untested nutrition changes—new gels, water-only aid stations, or skipped meals that GI and bonk risk on race day.
A marathon fueling mistake is any untested race-week change—new gels, restaurant experiments, skipping breakfast, over-drinking plain water, or copying elite carb grams without gut training. Mistakes cluster at expos, travel meals, and nervous under-eating.
The fix is rehearse everything on long runs and B-races.
Common questions
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What is the most common first-marathon fueling mistake?
Trying new gels or skipping early aid station carbs to save time—both cause late-race bonks that cost more minutes than a ten-second cup walk.
Related terms
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