Kinematics of glenohumeral joint for preventing shoulder injury in overhead sports

本研究的目的是比较在网球发球和棒球投球时盂肱关节的形态。在准备阶段，网球发球和棒球投球的肱骨相对于躯干的配置是相似的。然而，盂肱关节水平外展角小于棒球投球。盂肱关节构型的差异归因于肩胛骨前伸/回缩角度的差异。

The purpose of this study was to compare the configuration of the glenohumeral joint exhibited during the tennis serve and baseball pitching. The humeral configuration relative to the torso during the preparation phase was similar between the tennis serve and baseball pitching. However, the glenohumeral horizontal abduction angle was smaller than the baseball pitching. The difference in the configuration of the glenohumeral joint was attributed to the difference in the scapular protraction/retraction angle.