The smooth, dynamic, non-impact nature and compact size it can be used as rehabilitation devices and help with repetitive strain injury for the young to the old. It can used in a fitness, sports, rehabilitation or fun manner making it fun, pleasurable and very addictive. While the Powerball gyroscope can be used in a fitness sense for the arms, wrists and shoulders helping to build, tone and strengthen the muscles and ligaments in the hands, wrists, arms and shoulders. Using the theory above, you rotate the powerball with a circular wrist motion in either a clockwise or anticlockwise manner, it's works in both directions. With practice, speeds in access of 15,000 rpm's can be generated. There are a number of different uses for the Powerball that result in effective non impact exercise and it can be used as rehabilitation devices and help with repetitive strain injury for the young to the old. It can used in a fitness sense for the arms, wrists and shoulders helping to build, tone and define muscle. The speed of the rotation will increase. Effectively this is the same as carrying around a set of dumbbells in your pocket! When first

    Amazon.com: Digital Speed Meter for Dynaflex Powerball & Pro Plus: Sports & Outdoors
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    Dyna-flex Digital Speed Meter for Gyro Trainers - SHOP.COM
    dyna-flexdigital speed meter works with the dyna-flex powerball to display .Shop for Dyna-flex Digital Speed Meter for Gyro Trainers at Shop.com