Evaluation of Three on-the-Field Non-Assisted Posterior Shoulder Stretches in Collegiate Baseball Pitchers

摘要: Introduction: Shoulder musculoskeletal adaptations commonly occur in baseball pitchers due to repetitive throwing and extremely high shoulder velocities. Some observed include posterior tightness (PST) glenohumeral internal rotation deficit (GIRD). The static capsular structures dynamic muscles of the that are responsible for controlling normal arthrokinematics, must be properly stretched movement. It is speculated appropriate stretching joint can decrease amount PST an overhead athlete, help minimize risk developing pathologies, increase ability athlete perform. purpose this study was evaluate three on-the-field stretches among collegiate pitchers. hypothesized standing sleeper stretch at 90o, 45o, horizontal cross arm would create acute ROM differences provide scapular stabilization increasing IR decreasing PST. Methods: Glenohumeral ROM, PST, kinematics were measured 15 male All subjects free pain. Each subject performed one during 3 individual sessions. using inclinometer/anthropometer, pre post while assessed electromagnetic tracking device each stretch. Results: results show created significant increases (p<.0001) decreases supine side-lying (p=.012). There no between (p=.919), ER (p=.494), Supine (p=.536), Side-lying (p=.177). five kinematic values showed when compared upward (p=0.066), external (p=0.077), tilting (p=0.101), protraction (p=0.221), elevation (p=0.228). Conclusions: This has demonstrated performing a single session repeated 30 seconds adequate significantly GH Sufficient achieved correctly.