Shake Weight Pro Keep the shake Weight at least 6" away from your face at all times during excersies to avoid injury The Shake Weight is not motorized, it is a mechanical device that you move back and forth with your own muscle power Simply hold the Shake Weight Pro with both hands, lock your wrists and move the Shake Weight Pro slowly back and forth on an even plane. about 3" in each direction. Hold with both hands, elbows close to the body and tighen the muscles in your upper body The faster you move it, the more intense the workout will become