University of Delaware, Newark, DE, USA.
J Athl Train. 2010 Jan-Feb;45(1):44-50. doi: 10.4085/1062-6050-45.1.44.
Conditions such as labral and rotator cuff injuries have been linked with decreases in glenohumeral internal-rotation and increases in external-rotation motion. Also, decreased glenohumeral internal rotation is strongly associated with scapular dyskinesis.
To compare healthy collegiate and high school baseball players' glenohumeral joint range of motion and scapular position.
Cross-sectional study.
Institutional research laboratory.
Thirty-one male National Collegiate Athletic Association Division I collegiate (age = 20.23 +/- 1.17 years, height = 186.24 +/- 5.73 cm, mass = 92.01 +/- 7.68 kg) and 21 male high school baseball players (age = 16.57 +/- 0.76 years, height = 180.58 +/- 6.01 cm, mass = 79.09 +/- 11.51 kg).
MAIN OUTCOME MEASURE(S): Glenohumeral internal and external rotation and scapular upward rotation were measured with a digital inclinometer. Scapular protraction was measured with a vernier caliper. All variables except scapular upward rotation were calculated as the difference between the dominant and nondominant sides.
Collegiate baseball players had more glenohumeral internal-rotation deficit (4.80 degrees, P = .028) and total motion deficit (5.73 degrees, P = .009) and less glenohumeral external-rotation gain (3.00 degrees, P = .028) than high school players. Collegiate baseball players had less scapular upward rotation than high school players at the 90 degrees (4.12 degrees, P = .015, versus 3.00 degrees, P = .025) and 120 degrees (4.00 degrees, P = .007, versus 3.40 degrees, P = .005) positions. The scapular protraction difference was greater in collegiate baseball players than in high school players in the hands-on-hips and 90 degrees positions (0.77 cm, P = .021, and 1.4 cm, P = .001).
When comparing high school with collegiate baseball players, these data suggest that glenohumeral internal-rotation deficit and scapular position change as the level of competition increases.
盂唇和肩袖损伤等情况与盂肱关节内旋减少和外旋增加有关。此外，盂肱关节内旋减少与肩胛骨运动障碍密切相关。
比较健康的大学生棒球运动员和高中棒球运动员的盂肱关节活动范围和肩胛骨位置。
横断面研究。
机构研究实验室。
31 名美国大学生体育协会一级分区 I 大学生（年龄=20.23 +/- 1.17 岁，身高=186.24 +/- 5.73cm，体重=92.01 +/- 7.68kg）和 21 名男性高中棒球运动员（年龄=16.57 +/- 0.76 岁，身高=180.58 +/- 6.01cm，体重=79.09 +/- 11.51kg）。
使用数字测斜仪测量盂肱关节内旋和外旋以及肩胛骨上旋。使用游标卡尺测量肩胛骨前伸。除肩胛骨上旋外，所有变量均计算为优势侧和非优势侧之间的差值。
大学生棒球运动员的盂肱关节内旋不足（4.80 度，P =.028）和总运动不足（5.73 度，P =.009）较大，而盂肱关节外旋增加（3.00 度，P =.028）较小，与高中运动员相比。大学生棒球运动员在 90 度（4.12 度，P =.015，而 3.00 度，P =.025）和 120 度（4.00 度，P =.007，而 3.40 度，P =.005）位置的肩胛骨上旋较小。在手握臀部和 90 度位置，大学生棒球运动员的肩胛骨前伸差值大于高中棒球运动员（0.77cm，P =.021，和 1.4cm，P =.001）。
当比较高中和大学生棒球运动员时，这些数据表明，随着比赛水平的提高，盂肱关节内旋不足和肩胛骨位置会发生变化。
