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SESK: Stuff Everyone Should Know · sesk.info/run-fueling-carbohydrates

Which nutrient is the body's main energy source during a run and is helpful to eat before runs lasting more than an hour?

Carbohydrates, like a piece of fruit, help fuel longer runs.

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  1. Protein
  2. Fat
  3. Carbohydrates ✔

Why: Carbohydrates provide energy during exercise. They are stored mostly in your muscles and liver, so eating some before a long run helps you keep going.

Huh, didn't know that: Endurance athletes training for several hours may need 6 to 10 grams of carbohydrate per kilogram of body weight a day.

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Why did the runner bring a banana to the race? It was appealing.
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References

Answer: Carbohydrates. Carbohydrates provide energy during exercise. They are stored mostly in your muscles and liver, so eating some before a long run helps you keep going.

  1. Nutrition and athletic performance | MedlinePlus Medical Encyclopedia medlineplus.gov/ency/article/002458.htm
    It's helpful to eat carbohydrates before you exercise if you will be exercising for more than 1 hour.
    Checked 2026-10-12.

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