As people age, they experience a natural decline in muscle mass and strength, a process called sarcopenia. Hormonal changes, decreased activity levels, and inadequate nutrition contribute to this loss. Muscle mass typically declines at a rate of about 3-8% per decade after the age of 30. This reduction affects balance, mobility, and overall physical function, increasing the risk of falls and injuries. Engaging in regular strength training and consuming adequate protein can help mitigate these effects and promote healthier aging.