Voight M L, Hardin J A, Blackburn T A, Tippett S, Canner G C
Berkshire Institute of Orthopedic and Sports Physical Therapy, Wyomissing, PA 19610, USA.
J Orthop Sports Phys Ther. 1996 Jun;23(6):348-52. doi: 10.2519/jospt.1996.23.6.348.
It is hypothesized that proprioceptive information plays an important role in joint stabilization and that muscle fatigue may alter proprioceptive ability. The purpose of this study was to determine what effect shoulder muscle fatigue has on glenohumeral proprioception and to examine the relationship between arm dominance and shoulder proprioception. Eighty subjects without a history of glenohumeral pathology participated. Each was seated on an isokinetic dynamometer with a randomly selected shoulder positioned in 90 degrees of abduction and elbow flexion. With vision blinded, the arm was passively positioned in 75 degrees of external rotation for 10 seconds, then passively returned to the neutral starting position. Three trials each of active and passive repositioning (2 degrees/sec) were recorded. Following a fatigue protocol, both active and passive repositioning were reassessed. Testing order was randomized. A significant difference was detected between pre- and post-fatigue scores. No significant difference was detected between dominant and nondominant extremities. No relationship between arm dominance and shoulder proprioception was established. It is concluded that shoulder proprioception is diminished in the presence of shoulder muscle fatigue, suggesting clinical rehabilitation protocols must emphasize increasing muscular endurance.
据推测，本体感觉信息在关节稳定中起重要作用，并且肌肉疲劳可能会改变本体感觉能力。本研究的目的是确定肩部肌肉疲劳对盂肱关节本体感觉有何影响，并研究手臂优势与肩部本体感觉之间的关系。80名无盂肱关节病变病史的受试者参与了研究。每位受试者坐在等速测力计上，随机选择一侧肩部外展90度且肘部屈曲。在视觉被遮挡的情况下，将手臂被动地置于75度外旋位置10秒，然后被动回到中立起始位置。记录主动和被动重新定位（2度/秒）各3次试验。按照疲劳方案进行操作后，对主动和被动重新定位都进行重新评估。测试顺序是随机的。在疲劳前后的得分之间检测到显著差异。在优势和非优势肢体之间未检测到显著差异。未确立手臂优势与肩部本体感觉之间的关系。得出的结论是，在存在肩部肌肉疲劳的情况下，肩部本体感觉会减弱，这表明临床康复方案必须强调提高肌肉耐力。
