As you build up the speed, measured in revolutions per minute (rpm) the greater the torsion and dynamic forces acting upon your wrist, lower and upper arm muscles, depending on the arm orientation and direction of spin. 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. What do you want from your NSD Powerball today? - World Appeal - Totally non-impact at low speeds and medically recommended, NSD Powerball is a revolutionary new Gyroscope which literally explodes with mind numbing inertial forces once you activate its internal rotor! The Powerball gyroscope can be used in a fitness, sports, rehabilitation or fun manner making

    Powerball - Home Page
    Official site from the Multi-State Powerball Lottery Association.Includes the current jackpot, recent winning numbers, and where and how to play.

    Power Balls, Puzzle & Board Games - Presented by AddictingGames
    Author: Nabisco World can you make with these balls? Instructions: See game for instructions .Rearrange the balls to make words in this Power Balls