Loss of skeletal muscle mass with aging, accompanied by fatty infiltration of the muscle.
Loss of muscular mass and strength, especially in striated muscles. Sarcopenia commonly occurs with aging as a result of the combined effects of changes in exercise, nutrition, and hormonal activation of muscles (e.g., by growth and steroid hormones).
Sarcopenia means loss of muscle and decreased quality of muscle tissue. Strength training can restore or at least slow this loss as a person ages.