Physicians and therapists all over the world are using the DynaFlex Gyro as a rehabilitation and strength training tool for many of their patients. The gyro exercisers are a proven tool that will help aid in the prevention and elimination of Carpal Tunnel, Arthritis, Tendonitis, Tennis Elbow, and many other RSI conditions. The Sports Pro Plus reaches up to 13,500 RPM and creates 35 lbs. of torque resistance to increase range of motion and to condition arm, elbow, and shoulder muscles. The Powerball generates 40 lbs. of torque with speeds up to 18,000 RPM. With a push of the button the PowerDock Docking Station activates the gyro hand exercisers! It just takes a few seconds to get the gyro up to operating speed.