Chest expansion exercise, body rotation exercise, abdominal back exercise, etc. Warm-up is also called warm-up exercise. The former is named after physiological reaction, while the latter is a general concept. Warm-up exercise is a combination of some whole-body activities, and good warm-up exercise can play a very good role in helping. Before the main physical activity, you should move your limbs with a light amount of activity to prepare for more intense physical activity. The purpose is to improve the efficiency and safety of strenuous exercise and meet the physiological and psychological needs of the human body. Before exercise, the functional ability and work efficiency of human body can't reach the highest level at the beginning, so it is necessary to adjust the exercise state by warming up.