Declining muscle mass is part of aging, longer lasting pills but that does not mean you are helpless to stop it. The saying goes there are two certainties in life: death and taxes. But men should also add loss of muscle mass to the list. Age-related muscle loss, called sarcopenia, is a natural part of aging. After age 30, you begin to lose as much as 3% to 5% per decade. Most men will lose about 30% of their muscle mass during their lifetimes. Less muscle means greater weakness and less mobility, both of which may increase your risk of falls and fractures. A 2015 report from the American Society for Bone and Mineral Research found that people with sarcopenia had 2.3 times the risk of having a low-trauma fracture from a fall, such as a broken hip, collarbone, leg, arm, or wrist. But just because you lose muscle mass does not mean it is gone forever.