Step aerobics (1968) originated in the United States and soon became popular all over the world. As a form of aerobics, step exercise has increasingly become a fashionable fitness and weight loss exercise in the world. The main reason is that the most fundamental movement principle of step exercise is to combine the step exercise and the pace of aerobics in physical fitness test into a combined action and practice it on a specific pedal-"aerobic step exercise". Treadmill movement, that is, dancing up and down rhythmically with dynamic music (about 120 beats per minute) on the pedal to carry out aerobics movements and steps. It has all the characteristics of aerobics, and at the same time, because most of the movements are done on the pedal, it can enhance the cardiopulmonary function and coordination more effectively. Because it is mainly aimed at lower limbs and buttocks, it has obvious energy consumption and fat reduction (one class can consume 1000 ~ 1500 calories), improve buttocks and legs, and improve female muscle lines. As a form of aerobics, "step exercise" has increasingly become a fashionable way to lose weight internationally. The reason is that "step exercise" is to combine the step exercise in physical fitness test with the movements and steps of aerobics, and complete it on a special pedal. Therefore, it has all the characteristics of aerobics, the height can be adjusted, and the bodybuilder can easily maintain effective exercise intensity according to his own situation to lose weight and improve coordination more effectively. Another reason: "step movement" is safer. Because the "stepping movement" mainly moves up and down on the pedal, there are relatively few jumping movements, which naturally makes the joints of lower limbs have obvious flexion and extension and buffering, thus greatly reducing the impact on each joint and avoiding sports injuries caused by long-term jumping to the greatest extent. In the gym, the most popular fitness exercise for fashionable women is step exercise. Stepping exercise is a kind of moderate-intensity exercise, which has low requirements for dancers' dance level and is suitable for a wide range of people. It is very suitable for modern women to improve their body shape.