The function of fitness ball is mainly to enhance the toughness, flexibility and coordination of fingers and wrist joints, and it can enhance the strength of fingers, palms and wrist joints, which is quite beneficial to prevent hand shake and wrist joint stiffness in the elderly. Stimulating palm acupoints with fitness balls can reflect the function of central nervous system, strengthen brain and improve intelligence, and eliminate fatigue. At the same time, it also has the effects of relaxing meridians, promoting blood circulation, strengthening tendons and bones, and strengthening internal organs. Therefore, it is very beneficial for the elderly to insist on fitness ball exercise.