Oyama Sakiko, Myers Joseph B, Wassinger Craig A, Daniel Ricci R, Lephart Scott M
University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
J Athl Train. 2008 Oct-Dec;43(6):565-70. doi: 10.4085/1062-6050-43.6.565.
Observation of the scapular posture is one of the most important components of the physical examination in overhead athletes. Postural asymmetry is typically considered to be associated with injuries. However, asymmetry in the overhead athlete's scapula may be normal due to the dominant use of the limb.
To quantify the differences in resting scapular posture between the dominant and nondominant sides in 3 groups of healthy overhead athletes (baseball pitchers, volleyball players, and tennis players) using an electromagnetic tracking device.
Cross-sectional design.
University-based biomechanics laboratory.
A total of 43 players participated, including 15 baseball pitchers, 15 volleyball players, and 13 tennis players. All participants were healthy college-aged men.
INTERVENTION(S): Bilateral 3-dimensional scapular kinematics with the arm at rest were measured using an electromagnetic tracking device.
MAIN OUTCOME MEASURE(S): Bilateral scapular position and orientation were measured. Between-groups and between-sides differences in each variable were analyzed using separate analyses of variance.
In tennis players, the scapula was more protracted on the dominant side than on the nondominant side (P < .05). In all overhead athletes, the dominant-side scapula was more internally rotated (P = .001) and anteriorly tilted (P = .001) than the nondominant-side scapula was.
The dominant-side scapula of the overhead athletes was more internally rotated and anteriorly tilted than the nondominant-side scapula. The dominant-side scapula of the tennis players was more protracted than that on the nondominant side. Clinicians evaluating overhead athletes need to recognize that scapular posture asymmetry in unilateral overhead athletes may be normal. Our results emphasize the importance of the baseline evaluation in this population in order to accurately assess pathologic change in bilateral scapular positions and orientations after injury.
观察肩胛姿势是上肢运动运动员体格检查中最重要的组成部分之一。姿势不对称通常被认为与损伤有关。然而，由于上肢的优势使用，上肢运动运动员的肩胛骨不对称可能是正常的。
使用电磁跟踪设备量化3组健康上肢运动运动员（棒球投手、排球运动员和网球运动员）优势侧与非优势侧静息肩胛姿势的差异。
横断面设计。
大学的生物力学实验室。
共有43名运动员参与，包括15名棒球投手、15名排球运动员和13名网球运动员。所有参与者均为健康的大学生男性。
使用电磁跟踪设备测量双臂休息时的双侧三维肩胛运动学。
测量双侧肩胛位置和方向。使用单独的方差分析分析每组之间和两侧之间各变量的差异。
在网球运动员中，优势侧肩胛骨比非优势侧更前伸（P <.05）。在所有上肢运动运动员中，优势侧肩胛骨比非优势侧肩胛骨更内旋（P =.001）和前倾（P =.001）。
上肢运动运动员的优势侧肩胛骨比非优势侧肩胛骨更内旋和前倾。网球运动员的优势侧肩胛骨比非优势侧更前伸。评估上肢运动运动员的临床医生需要认识到单侧上肢运动运动员的肩胛姿势不对称可能是正常的。我们的结果强调了对该人群进行基线评估的重要性，以便准确评估损伤后双侧肩胛位置和方向的病理变化。
