Long-term swimming for men can build muscles, enhance cardiorespiratory fitness as well as shape the body. 1. Exercise muscles: men often swim, especially using the breaststroke position, for leg muscles, abdominal muscles and pelvic floor muscles have a very good exercise. Swimming can also exercise the whole body muscles, so as to achieve the purpose of improving muscle power and muscle strength. 2. Enhance cardiorespiratory function: swimming is an oxygen-consuming exercise, appropriate swimming for promoting blood circulation, enhance cardiorespiratory function is very good help. 3. Shape the body: when swimming in the water, the body needs to consume a lot of calories, often appropriate swimming can make the body excess fat burning, so as to achieve the purpose of weight loss and shape the body. Swimming should pay attention to safety, avoid choking, such as the emergence of discomfort immediately ashore.