Attach a single-grip handle to a cable pulley, and set it at about shoulder-height. (You can also use a band.) Grasp the handle with one hand over the other, and step away from the machine to put tension on the cable; turn to your left 90° so your right side is now facing the machine. Stand with feet shoulder-width, and extend your arms in front of you. The cable will try to twist your body toward—resist.