Kevin E Will et al. Deficits in glenohumeral passive range of motion increase risk of elbow injury in professional baseball pitchers: a prospective study. Am J Sports Med. 2014 Sep;42(9):2075-81.
Takamura T.,Satoshi S.,et al: Abduction, Horizontal flexion, and Internal Rotation in Symptomatic and Asymptomatic Throwing Athletes. 4th International Congress of Shoulder and Elbow therapist. 234. 2013.
Halbrecht JL.et al. : Internal impingement of the shoulder: comparison of findings between the throwing and nonthrowing shoulders of college baseball players. Arthroscopy 15: 253-258, 1999
Mochizuki T, Sugaya H, Uomizu M, Maeda K, Matsuki K, Sekiya I, Muneta T, Akita K. Humeral insertion of the supraspinatus and infraspinatus. New anatomical findings regarding the footprint of the rotator cuff. J Bone Joint Surg Am. 2008 May;90(5):962-9. doi: 10.2106/JBJS.G.00427. PMID: 18451386.
棘上筋の注目すべき部分は、 結節間溝を跨いでいるということです。
少し前方へ付着するので、 1stポジションでの外旋の制限にもなりえるかと思います。
身体評価
可動域:肩甲上腕関節内転( ≒ 肩甲骨上方回旋) 筋力:full can test empty can test