To determine: The effect of diet consisting of carbohydrates on muscle glycogen and endurance during heavy exercise.
Introduction: Nutrition is defined as the essence of the food that people intake. Nutrition is important to perform various activities of growth, repair, and maintenance of the cells/constituents of the body. Some important constituents of the food that comprise the maximum of the food are carbohydrates, lipids, and proteins. Vitamins and minerals are equally necessary. All these constituents impart different amounts of calories.

Explanation of Solution
Carbohydrate is a class of
Heavy exercises rapidly exhaust the level of muscle glycogen. The effect of various diets (2800 kcal/day) on muscle glycogen and endurance performance is as follows:
- After exercise, the intake of a diet (2300 kcal from carbohydrates) with maximum carbohydrates increased the level of glycogen (3.31g /100g muscle) in muscles. Moreover, the endurance was found maximum with performance duration of 167 minutes.
- A medium carbohydrate diet provides intermediary levels of glycogen (1.75 g /100g muscle) with performance duration of 114 minutes.
- A protein–lipid-rich diet (low carbohydrate level) will not provide sufficient levels of glycogen (0.63g/100g muscle). Endurance level is also found minimum in such cases with performance duration of 57 minutes.
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