What is commonly decreased as a person ages?

As individuals age, muscle mass typically decreases due to a combination of factors, including hormonal changes, decreased physical activity, and changes in nutrition. This condition, known as sarcopenia, generally starts in the third decade of life but becomes more pronounced as one approaches older age. The loss of muscle mass can lead to a decrease in strength and mobility, which may affect overall health and the ability to perform daily activities.

While bone density, circulation, and skin elasticity are also affected by aging, muscle mass is particularly significant because it directly influences physical function and overall quality of life. Maintaining muscle mass through regular strength training and physical activity is crucial for older adults to promote independence and prevent falls.