Weight training improves strength, endurance, metabolism, and heart function.
It can help prevent or manage chronic conditions, such as low-back pain and diabetes. Weight training is good for people who find aerobics tough, such as the elderly. This study looked at whether women between the ages of 19 and 21 played high-impact sports in junior high and high school. These types of sports included basketball and tennis. Those who did play had much higher bone density than those who did not.