<human>:  What is the difference between an elliptical and a stair stepper?
<bot>: The difference between an elliptical and a stair stepper is that the elliptical is a low-impact cardio machine typically designed to provide a full-body workout, while a stair stepper offers more of an upper-body workout focused on toning the lower half of the body. An elliptical uses two moveable handles, the pedals and the arms, to power the machine. The arms are the most often used version, which involve a pushing and pulling motion. The pedals and arms move opposite to one another and provide a low-impact elliptical movement. On the other hand, a stair stepper is like an escalator, with two pedals that are attached and move up and down with every step. stair stepper is a great workout as it focuses on toning the lower half of the body, such as the glutes, hamstring, calves, and quads.