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Revolutionary Gyro Exerciser Increases Wrist and Hand Strength Without Strenuous Exercise. The new Dyna-FlexTM PowerBall Gyro Exerciser provides resistance by using a complex device based on a simple scientific principle--a spinning gyroscope resists changes in position. Designed with a high performance rotor, PowerBall reaches speeds up to 13,000 rpms and torque up to 38 lbs. As you can imagine, it takes coordination and muscular strength for your hand, wrist and arm to control the PowerBall as its internal gyroscope continually works to right itself. Part of the beauty of the PowerBall is that the speed of the gyroscope and the resistance it provides are controlled by the movement of your wrist. The more you exercise, the faster it goes. And as the gyro picks up speed, the motion powers the on-board generator that activates the interior LED lights. The faster the gyro spins, the brighter the lights glow. Not only does PowerBall improve your performance in activities requiring control and a strong grip, like golf and tennis, it also aids in the prevention of repetitive strain injuries and carpal tunnel syndrome. Plus PowerBall features a removable top cap for the insertion of the optional digital speedmeter (Item#50264). Simply remove the top cap and snap the speedmeter into place. PowerBall: 2.75"H x 9" dia. Click here for more information and price |