Cycling, as an aerobic exercise, strengthens leg muscles, improves cardiorespiratory fitness and more, while over-exercise can cause perineal injuries. The benefits are: 1. Long-term cycling can exercise leg muscles, improve bone tissue and prevent osteoporosis. 2. At the same time, it promotes blood circulation and enhances cardiopulmonary function. 3. Improve tissue microcirculation, prevent hypertension, high blood pressure, high blood fat, etc., enhance physical fitness, to achieve the purpose of weight control and weight loss. The disadvantages are: 1. Long-term cycling increases the pressure on the perineum and affects the blood supply to the genitals, thus reducing the function of libido. Men are prone to suffer from impotence, prostate and other diseases, while women are prone to suffer from pubic injuries, which may lead to swellings. 2. In addition, it may also cause diseases such as upper and lower limb joint injury.