投球スポーツにおける腱板，肩甲骨機能の低下と胸鎖関節の mobility との関係 - 胸鎖関節 mobility テストを用いて -

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The aim of this study is to show the relationship between the rotator cuff and scapular dysfunction and the restriction of the sternoclavicular joint movement in throwing athletes. We studied 40 throwing athletes (throwing group, average age: 18.1 years) and 40 non-throwing athletes (non-throwing group, average age: 18.3 years) to evaluate the rotator cuff and scapular function with the elbow extension test (ET) and punching test (PT), and the sternoclavicular joint movement with the sternoclavicular joint mobility test (SCMT). The SCMT is a method to evaluate the sternoclavicular joint movement through indirect observation of the movement of examiners fingers put on the proximal end of the bilateral claviculas during anterior elevation of bilateral shoulders from an at side position to the maximum. In normal cases, the bilateral proximal ends of the clavicula equally moved to the supero-lateral direction, rotating backward during elevation. We considered the SCMT positive when there was little movement of the clavicula at the throwing side, compared with that at the non-throwing side. We compared the positive ratio of the SCMT, ET, and PT between two groups. In the throwing group, the positive ratio of the SCMT, ET, and PT was 85, 92, 93%, respectively, while in the non-throwing group, that was 18, 20, 20%, respectively. There were significant differences between the two groups in each 3 test. Irrespective of the two groups, cases with a positive SCMT almost always corresponded to cases with a positive ET and PT. The restriction of the sternoclavicular joint movement greatly influenced the rotator cuff and scapular dysfunction in throwing athletes.

投球スポーツにおける腱板，肩甲骨機能の低下と胸鎖関節の mobility との関係 - 胸鎖関節 mobility テストを用いて -

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