I like this better than stair climbing, which doesn’t keep the heart rate steady (it slows down when you descend the stairs). This is also a very versatile exercise in that the more fit you are, the higher the chair should be. If you’re really out of shape, try to find a stool around five inches high. Here is the way you should do it: Step up with the right foot, then bring the left foot up, step down with the right foot, then bring the left foot down. With each additional step up, you should alternate feet. Be sure to keep your back straight. This exercise is especially fun to do to music.