The forearms are the muscles between the elbow and the wrist. The forearm is comprised of various muscle groups such as flexors, extensors, supinators and pronaters along with major nerves and arteries that facilitate movement of hands, elbows, wrists, fingers and thumbs. Your forearms control most of your gripping strength and help with activities like swinging a hockey stick, a golf club, a tennis racquet or baseball bat, or throwing a ball; your forearms also help with fine motor skills such as writing, drawing or playing a guitar or piano.

The PowerWristor allows for the user to perform flexion, extension, ulnar and radial deviation movements.

The PowerWristor is designed to help strengthen your forearm, hand, wrist and finger muscles; as well as rehabilitation of forearm, wrist and hand function following wrist injuries and surgeries. The system is a table top device for exercising, rehabilitating and/or strengthening the muscles, tendons and ligament in the hands, wrists and/or forearm, as well as enabling the simultaneous improvement in the full range of motion in these areas. Athletes will benefit because it is designed to help strengthen your hand and wrist muscles.