<human>:  What is the difference between a treadmill and an elliptical?
<bot>: The main difference between a treadmill and an elliptical is the way they are designed to move and interact with the body. A treadmill is a motorized running machine, while an elliptical is a low impact stationary machine that offers a full body aerobic workout. The movements of a treadmill are designed to mimic the feeling of running, while the elliptical offers a more natural movement with an increased range of motion. In addition, each machine requires a different set of muscles to be used, resulting in a different type of workout.