When swimming in cold water, the body is stimulated by some cold, which will unconsciously produce protective stored fat to keep warm, thus causing a great increase in appetite after exercise and unconsciously consuming more calories after exercise. But the same intensity of exercise and training, the two consume almost the same amount of calories, swimming is slightly higher than running.

In terms of protecting the body, swimming can reduce the pressure on the lumbar joints and knee joints, and it is not easy to produce such diseases, and these two joints are the most easily injured by overweight people. When swimming, these joints don't need to be hit by the ground, but running on the ground will greatly increase the pressure on these two joints. But swimming too often will increase the chance of shoulder joint wear, especially freestyle and backstroke.