Why is it important to eat carbohydrates before running a marathon

, eating carbohydrates before exercise will give a person a boost in glycogen stored in their muscles , enabling them to work out for longer. Eating carbohydrates while they exercise will provide them with a supply of glucose in their blood, which will serve as extra fuel and give them additional energy .

Explanation:

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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