Muscle fatigue

Question

Muscle fatigue

Quizplus · Accepted Answer

During long-duration, low-intensity exercise, there is an increase in hydrogen ion concentration in the muscle which interferes with the contractile protein activity, causing muscle fatigue. This phenomenon is also known as acidosis. Depletion of ATP stores is not the primary cause of muscle fatigue and muscle glycogen stores are depleted after prolonged, low-intensity exercise. Build-up of potassium ion in the lumen of T tubules may cause muscle cramps but is unlikely to cause muscle fatigue.

Muscle Fatigue