Integrating the concept of a barbell and medicine ball, this completely unique device offers a workout that will have you kick, punch, jump, squat, shuffle, joust, twirl, sprint, bend, throw, and stretch your body into great shape. There are more than 100 multi-plane functional exercises that can be customized to fit many workout needs, including isolated strength training, total body conditioning, and endurance training. The NRG BALL comes in a variety of weights -- making the NRG BALL ideal for all levels of training and rehabilitation. Its even portable, so you can take it anywhere, use it anytime -- at home, in the office, or on the road. Avialable in 5, 7, or 9 lb. sizes.