Skaters add variations or unusual entries and exits to jumps to increase difficulty. For example, they will perform a jump with one or both arms overhead or extended at the hips, which demonstrates that they are able to generate rotation from the takeoff edge and from their entire body instead of relying on their arms. It also demonstrates their back strength and technical ability to complete the rotation without relying on their arms. Unusual entries into jumps demonstrate that skaters are able to control both the jump and with little preparation, the transition from the previous move to the jump. Skaters rotate more quickly when their arms are pulled in tightly to their bodies, which requires strength to keep their arms being pulled away from their bodies as they rotate.