By holding this ball tightly in your hand, blood flow in your arm increases. It effectively rehabilitates pain in the wrist, fractures, scaphoid fractures, radial head fractures, numb fingers, numb hands, wrist fractures, elbow tendonitis, bone fractures, and bursitis. It also increases strength in your fingers, wrists, hands, forearms, biceps, triceps, ligaments, and shoulders. Recommended by doctors all over the world. It is also a very effective warm-up for weightlifting.
