Long-term exercise is good for your health. On the surface ofthe sphere tentacles of moderate hardness, massage your skin,stimulate the nerve endings, promote blood circulation, relax tensenerves, strengthen the body flexibility. When you have a headachewhen using small massage ball in the head gently rolling, will feelmore comfortable; cold back massage, will more easily than the purehand massage. Is a very good training tool for improving thebalance and stability of core muscle training.