Musculoskeletal System

By the time we reach age 80, most of us will lose an average of about 2 inches of height. The primary factors contributing to this reduction in height include compression of vertebrae, changes in posture, and increased curvature of the hips and knees. In addition, most older Americans gain weight until about age 60, after which it declines. This pattern of weight change is more likely the result of reductions in activity and changes in eating rather than aging itself. There are a number of other changes in the body with aging that affect the bones, muscle, and skin.