After the age of 40, people typically lose eight percent or more of their muscle mass with each passing decade. But recent research suggests that this is not a foregone conclusion. One study of 40 competitive runners, cyclists, and swimmers, ranging in age from 40 to 81, found no evidence of deterioration. The athletes in their 70s and 80s had almost as much thigh muscle mass as the athletes in their 40s. By Dr. Joseph Mercola

Source: How Do They Do It? 80 Year Olds With 40-Year Old Muscle Mass | Wake Up World