All athletes need to build strength for certain sports, such as golf, tennis, baseball or any sport that demands powerful grip and strong arms. With practice, speeds in access of 15,000 rpm's can be generated. The Powerball can be used as rehabilitation devices and help with repetitive strain injury for the young to the old. You use your wrist in a circular motion to generate the force to continually increase the speed, which in turn acts with a greater resistive force against your body. The smooth, dynamic, non-impact nature of Powerball helps build muscle strength, stimulate blood flow and ligament strength. Due to the dynamic nature of the device, the force achieved from the device is grooved near the axle, so with an externally applied force, the axle will push against the rim. At higher speeds, the pulverising forces building from within its core are key to a powerful muscle building process in the forearms, triceps, biceps and shoulders, making it an ideal training product for all sports enthusiasts and body builders alike. The fact that you'll go "wow!" the first time you put a live one into your hand and then find it impossible to

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