Aerobics is a combination of gymnastics, dance and music, based on aerobic exercise. In recent years, it has been favored by the majority of teenagers, but some details can not be ignored if aerobics is to achieve good results. Hand shape is the extension and expression of arm movements. If used well, it will make aerobics movements more colorful, lively and infectious. Aerobic exercise can refresh people's spirits and make their brains more awake. But aerobics must master the rhythm, not too fast. Fast-paced aerobics can not only play the role of exercise, but also easily overload the amount of exercise. Scientific research has proved that overloaded exercise not only makes people very tired, but also reduces human immune function, which is not good for the body. The speed of aerobics is too fast, and it is easy for the jumpers to keep up with the rhythm, leading to improper movements and sports injuries. Too fast rhythm is easy to make jumpers nervous and tired, and it is more likely to cause sports injuries such as strain and sprain. When doing aerobics, practitioners must control the speed and intensity of exercise according to their own physique and endurance. After a group of fast-paced movements, you should make a soothing ending action and adjust your heartbeat and breathing. Beginners, patients with chronic diseases and people over middle age should sweat a little after each exercise and feel a little tired. The heart rate is around 130 beats/min and does not exceed 1 hour. With the improvement of exercise level, the total amount of exercise can be appropriately increased, and the maximum heart rate should not exceed 150 beats/min.