Named for the long two goat horns on the jump ball, it is a new type of sports equipment integrating entertainment and fitness, suitable for children's play and women's fitness exercise, popular in Europe and the United States, the domestic gym and kindergarten is also quite popular. The crook ball has the functions of sitting, riding, jumping and patting. It is safe and reliable to use and full of elasticity. The child's jumping and jumping on it is lively and lovely. To fat person, in use process, can burn and transform abdominal redundant adipose, achieve the goal that reduces weight thereby; Fashionable lady also can be used as ball exercise equipment, the heart rate of the person that does ball to hold to be in every minute 115 ~ 135 times between, the person won't feel asthma, but the quantity of heat that consumes however achieves every 45 minutes 3 ~ 6 thousand calories!! Use for a long time, can achieve weight loss, stomach, hip, breast enhancement effect, enhance cardiopulmonary function, physical strength, endurance, balance, especially easy to shape the leg curve, tightens hip, create attractive figure!