Because the yoga ball is very elastic, when sitting on the yoga ball, you need to concentrate and keep your body balanced at any time, so that you can exercise the balance ability of the cerebellum. In the process of maintaining balance, the muscles of the body maintain high tension, consume calories, burn excess fat in the body, and achieve the purpose of slimming, which has the best weight loss effect on the waist and abdomen, making the body slimmer and more upright. Some yoga balls have many bumps. Sitting on it can massage hip points, which has special effects, such as stimulating Chengfu point to prevent hemorrhoids, stimulating Changqiang point to treat constipation and so on.