What term describes the age-related loss of lean body mass, strength, and function?

The term that describes the age-related loss of lean body mass, strength, and function is sarcopenia. This condition is characterized by a gradual decline in muscle mass and strength, which typically begins in middle age and accelerates with advancing age. Sarcopenia can lead to an increased risk of falls, frailty, and a decline in overall physical performance, highlighting its significance in geriatric health.

In contrast, osteoporosis refers to the loss of bone density and the deterioration of bone tissue, primarily affecting the skeletal system rather than muscle mass. Hyperplasia is the increase in the number of cells in a tissue, which is not directly related to the loss of muscle or strength. Hypotonia describes decreased muscle tone or tension, which can be caused by various factors but does not specifically relate to the age-related loss of lean body mass and strength. Thus, the correct term for age-related muscle loss is sarcopenia.