Aerobics is a novel, interesting and special sport. 1963 fitness ball first appeared in Switzerland, then it was only used as a rehabilitation medical device. After that, the fitness ball was spread to Australia, the United States, Europe and other countries and regions, used to treat diseases such as low back diseases and mental disorders, used for the rehabilitation of knees and shoulders, corrected posture, and improved patients' balance ability. Because of the remarkable effect of fitness ball on improving some muscles (waist, back and pelvis), this sport is gradually popularized to the society. Fitness ball is not only a physical therapy method, but also a new fitness exercise.