Exercise Physiology: Theory and Application to Fitness and Performance 9th Edition by Scott Powers, Edward Howley

Exercise 5

Describe the two mechanisms by which muscle glycogen is broken down to glucose (glycogenolysis) for use in glycolysis. Which one is activated at the same time as muscle contraction?

Step 1 of 3

The primary source of carbohydrates that fuels muscular work is muscle glycogen. Glycogen is the storage polysaccharide of animals. It is a polymer of glucose monomers linked through ?, 1-4 and ?, 1-6 glycosidic bonds. The breakdown of glycogen in muscles is inversely proportional to the intensity and duration of the exercise.