Most of the carbohydrate (e.g. ,for a rested,well-fed athlete)used as a substrate during high-intensity exercise comes from
A)muscle glycogen stores.
B)blood glucose.
C)liver glycogen stores.
D)glycogen stored in fat cells

Question

Quizplus · Accepted Answer

Muscle glycogen stores are the primary source of carbohydrate used during high-intensity exercise. Blood glucose and liver glycogen stores may contribute, but they are not the primary source. Glycogen stored in fat cells cannot be used as a substrate during high-intensity exercise.

Most of the Carbohydrate (E