Stepper machines provide aerobic exercise. Aerobic exercise of any kind provides many health benefits, depending on the intensity, duration and frequency of your workouts. Generally, exercising regularly on a stair-stepper machine can develop cardiovascular fitness, enhance lower-body muscles and burn calories. Stepper machine target muscles in the buttocks, hips, calves and thighs. Using a stepper machine burns a significant number of calories. Stepper exercise machine provide a low-impact workout, which means your body won't experience the same jarring shocks as it might during a vigorous aerobics dance class or while jogging.