Glucose is the major sources of energy which utilized during the 100 m race , 1000 m race . Glucose is formed from the breakdown of carbohydrate and stored as a glycogen in muscles and liver.
Carbohydrates and fat are the primary sources of energy with protein contributing a minimal amount under normal conditions.ATP is body's usable from of energy. Body uses three type of different system of metabolism to transfer stored energy to form ATP.
Runner wants to sustain high intensity energy for marathon , must obtain sufficient glycogen stores. High carbohydrate foods are good for runner so that they quickly get energy.
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