Run Long, Run Healthy

Run Long, Run Healthy

You're Not Consuming As Many Carbs As You Think

Most runners are under-consuming carbs and over-estimating how well they’re fueling.

Brady Holmer's avatar
Brady Holmer
Oct 16, 2025
∙ Paid

Runners tend to be meticulous about their pre-race and race-day nutrition. Ask any marathoner how much carbohydrate they take in during a race, and most will confidently tell you: “I fueled perfectly,” giving you an answer down to the exact gram.

The problem is, they’re probably wrong.

A new study from researchers at Dublin City University and Liverpool J…

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