Air Stepper uses patented air power technology to create resistance with every step that you take. It pumps the bellows of the Air Stepper that are located underneath each of the foot pedals. When you exercise on the Air Stepper, air moves between the two bellows and creates resistance that your whole body will benefit from. The Air Stepper uses the power of air, and minimizes the impact and jarring most conventional workout machines would create on your joints and muscles. With this technology, you will be able to use your Air Stepper for a longer period of time, and not feel tired, sore, and in pain afterwards. The Air Stepper is the ultimate convenient walking workout machine that will help you burn calories and get fit, all with the power of air!