McMaster W C, Long S C, Caiozzo V J
Department of Surgery, University of California, Irvine.
Am J Sports Med. 1991 Jan-Feb;19(1):72-5. doi: 10.1177/036354659101900112.
The specific repetitive activity of water polo, like baseball pitching, emphasizes adduction and internal rotation. This study used the Cybex II to evaluate the isokinetic strength of the rotator cuff in elite water polo players and in a group of control subjects. The water polo players were significantly stronger than the controls. Of greater importance was the confirmation of imbalances in the rotator cuff force couples of adduction/abduction and external/internal rotation. These changes are similar to those reported for pitchers. The adductors in the water polo group had gained in relative strength resulting in an increase in the adduction/abduction ratio to about 2:1. The internal rotators had gained in relative strength resulting in a decrease in the external/internal ratio to about 0.6:1. For both force couples the differences are more apparent at a slow speed. Side-to-side differences were not significant.
水球运动的特定重复性动作，如棒球投球，着重于内收和内旋。本研究使用Cybex II评估精英水球运动员和一组对照受试者肩袖肌群的等速肌力。水球运动员明显比对照组更强壮。更重要的是，证实了内收/外展和外旋/内旋肩袖肌群力偶存在失衡。这些变化与投手所报告的相似。水球组内收肌的相对力量增加，导致内收/外展比例增加到约2:1。内旋肌的相对力量增加，导致外旋/内旋比例降低到约0.6:1。对于这两个力偶，差异在慢速时更明显。左右侧差异不显著。
