Build strength in the fingers, hands, wrist and forearms, while reducing stiffness and joint pain by stimulating blood circulation in the forearm, wrist, fingers and hand. Great for relieving stress and anxiety, the therapy balls ease tense muscles for greater relaxation and flexibility Effective for stress relief and for hand exercise The squeezing action stimulates the nerves that lead to the brain to help relive tension and lower levels of stress by activating the muscles in the hand and wrist