Designed by golf professionals and sports physiologists, the GolfGym PowerSwing Trainer's patented combination of the biomechanically unique strengthening qualities of pure, hand-dipped Latex PowerCord and the ProPerfect Training Grip develops proper swing habits and muscle memory by exercising golf-specific muscle groups, including the rotator cuff region of the shoulder, hips, back and stomach muscles. The PowerSwing trainer features a molded-grip designed to help users grip the club correctly. By increasing strength, flexibility and clubhead speed, it provides a golf-specific workout and muscle resistance while reducing the risk of injury.