Losing muscle mass is one of the problems of aging. Our bodies start losing muscle when we get to about thirty years old. By 50 years, the typical person has lost about 10% of their muscle mass. By age 80 we are shrivelled up and have lost 40% of our muscle mass.Tom Valeo explains that if we lose 20 pounds while dieting but not exercising, about 8 of those pounds will be muscle. If we then gain the weight back and then diet again we will lose more muscle. See how to avoid this muscle loss while dieting here.
