Many distance runners "carb load" the day before a big race. How does this eating strategy provide an advantage to the runner?

The carbohydrates cause the release of insulin.

The excess carbohydrates are converted to fats, which have a higher calorie density.

The glucose from the carbohydrates lets the muscles make excess ATP overnight.

The excess carbohydrates can be stored in the muscles as glycogen.

Many distance runners "carb load" the day before a big race. How does this eating strategy provide an advantage to the runner?

The carbohydrates cause the release of insulin.

The excess carbohydrates are converted to fats, which have a higher calorie density.

The glucose from the carbohydrates lets the muscles make excess ATP overnight.

The excess carbohydrates can be stored in the muscles as glycogen.

Explanation:

During the exercise, the energy is consumed in the form of glycogen that the liver provides, there are evidences that maintain that the consumption of carbohydrates during prolonged sports improves fatigue resistance.

During exercise, carbohydrates stored as muscle glycogen are used as a specific energy source for muscle. In the liver, however, glycogen is converted by glycogenolysis into glucose, which passes into the blood and from it to the working muscles.

The answer is: Excess carbohydrates can be stored in the muscles as glycogen.