Powerballs
Feel the force of 20,000rpms inside your hand powered only by yourself!
APowerball® is a gyroscopic hand exerciser that uses inertial resistance (gyroscopic precession) in order to strengthen your hands, wrists and arms.
Inertial resistance is the force that fights against you when you try to change the direction of any spinning body. Inside a Powerball® a rotor (wheel) spins freely on its axle. Once spinning, this rotor wants to continue facing the same direction. With Powerball® you turn your wrist in a circular motion; changing the direction of the rotor through turning your wrists creates inertial resistance. The spinning rotor in a Powerball® creates an almost magnetic-field-like feeling against the user. The faster the Powerball® rotor is spinning the more inertial resistance generated against the user, which can be over an incredible 60+ pounds (27 kilograms).
The Powerball® also lives up to its name as the rotor through magnetic induction can power multi-coloured LCD lights and a digital counter that can track your strength gains and the rpms of the Powerball®.
Powerballs are used by everyone from professional athletes looking to improve grip strength to astronauts as training aids in zero gravity or even professional musicians looking to build endurance and stay healthy while playing. The Powerball® gyroscope is also a world-class rehabilitation tool due to the 100 per cent non-impact isometric nature of the resistance exercise it provides.