Exercise and physical activity play an important role in the prevention of age-related osteoporosis and have an irreplaceable effect of drugs. 1, exercise can promote systemic blood circulation, bones through the increase in blood flow can get sufficient nutrients and inorganic salts, thus slowing down the rate of aging and degenerative changes in the bones. 2, exercise when the bones are significantly increased force. In the case of stress, osteoblasts and other growth factors beneficial to bone metabolism active, so that the growth and renewal of bones accelerated, the density and strength of bone also increased significantly. 3, the whole body metabolism accelerates during exercise, appetite increases, which promotes the absorption of nutrients and can make up for the shortage of calcium and phosphorus.