So she only really starts to zero in on race-specific nutrition the day before.

Shell also include a lean protein like chicken or fish.

Im trying tohave a little less fiber, but some cooked vegetables are always nice.

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Then shell just have a small glass of water when shes brushing her teeth.

Sleep is just as important as nutrition, she says.

And not having to use the restroom more times a night is a big part of that.

Two young women practicing ballet with a teacher in the dance hall.

Paralympic wheelchair athlete and registered dietitian

Coffee is also a must.

What I love, if I have the opportunity, is to bring my ownAeroPress.

I usually use about 16 grams of beans and grind those up, she says.

Woman doing hip exercises

And that applies to your marathon fueling plan, too.

Scaroni suggests training with exactlywhat you plan to eatduring the race, down to the exact brands and flavors.

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Cropped image of woman doing lunge yoga pose

Woman in leggings and bra doing Lunge with Arm Extended Up pose hip opener stretch during yoga session in morning at home.

Paralympic wheelchair athlete and registered dietitian

Woman doing arm exercise without weights while sitting on mat at home.

A woman in sports clothes does yoga or gymnastics at home. Daylight. She smiles