Water Workx will help you to increase/improve strength, endurance, flexibility, coordination, posture, balance & overall health. The pleasing sound of water during exercise helps mentally unwind after a stressful day & concentrate on your workout! How it Works The Water Workx distinctive feature is the patented water tank, consisting of two interlinked cylinders (chambers). This tank is both strong & extremely light-weight. Which each pull the water tank creates a vacuum in the inner cylinder. This vacuum, causes the water to be sucked through the valve out of the cylinder into the inner chamber. The valve in the inner chamber can be regulated by turning the metal dial at the top of the tank to increase or decrease resistance. Compared to other exercise machines & home gyms the Water Workx offers several important benefits: unique self-regulating water resistance lower risk of injury to joints, muscles & bones specially designed workout manual guiding you trough a larger number of exercise routines stylish, environmentally sensitive design enjoyable soothing sound of water during exercise Maximum user weight 150kg