Exercise has several effects on the improvement of osteoporosis: 1. For the elderly, exercise can reduce the rate of bone loss at the stress site, although it starts to increase bone density. For young people, adequate exercise in the young period can obtain higher bone reserves, and can effectively avoid the rate of bone loss in old age. 2, the study found that for the elderly after fitness and exercise, both estrogen/androgen can be detected to be elevated, and these hormones are important factors in maintaining bone mass balance. However, it should be noted that high-intensity exercise will instead reduce hormone levels, so the elderly are more suitable for light to moderate exercise. 3, regular exercise allows the elderly to often go outdoors to contact the sun, which is conducive to the production of vitamin D in the body, and we know that vitamin D is particularly useful for the absorption and utilization of calcium.