Question

during intense activities, glucose is the primary fuel, and it comes primarily from which of the following?

a. fatty acids

b. glycogen stores

c. oxygen

d. fat stores

Explanation:

During intense activities, the body needs quick access to glucose for energy. Glycogen (stored glucose in liver and muscles) is broken down rapidly to release glucose, making it the primary source. Fatty acids and fat stores are used for longer, less intense activities, while oxygen is not a fuel source but supports energy production.

Answer:

b. Glycogen stores