With aging, body composition changes. Even though the body weight may not change, women lose muscle and gain more body fat at midlife. This age-related process, called sarcopenia, begins around age forty when women lose about one-half pound of muscle per year, as well as muscle strength and function.
While these figures may be disturbing, they can also be slowed and even reversed, if there is a focus on a regular, moderate exercise program to keep body fat low and muscle mass high.
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