与健康对照组相比，尺侧副韧带撕裂的棒球运动员表现出肩袖力量下降。
BASEBALL PLAYERS WITH ULNAR COLLATERAL LIGAMENT TEARS DEMONSTRATE DECREASED ROTATOR CUFF STRENGTH COMPARED TO HEALTHY CONTROLS.
作者信息
Garrison J Craig, Johnston Chris, Conway John E
机构信息
Manager of Research and Post-Professional Residencies, (to Texas Health Ben Hogan Sports Medicine) Texas Health Ben Hogan Sports Medicine, Fort Worth, TX, USA.
West Virginia University, Morgantown, WV, USA.
出版信息
Int J Sports Phys Ther. 2015 Aug;10(4):476-81.
BACKGROUND
Ulnar Collateral Ligament (UCL) tears are common in baseball players. Alterations in rotator cuff strength are believed to be associated with injury to the shoulder and/or elbow in baseball players.
HYPOTHESIS/PURPOSE: Baseball players diagnosed with a UCL tear will demonstrate decreased internal (IR) and external rotation (ER) force as an indication of isometric muscular strength in the throwing arm compared to IR and ER force of the throwing arm in healthy baseball players. The purpose of this study was to examine isometric IR and ER strength of the shoulder in baseball players with UCL tears at the time of injury compared to healthy baseball players.
STUDY DESIGN
Case-control study design.
METHODS
Thirty-three of the participants were diagnosed with a UCL tear and thirty-three were healthy, age- and positioned-matched controls. All of the participants played baseball at either the high school or collegiate level and volunteered for the study. Isometric rotator cuff strength measurements for internal (IR) and external rotation (ER) were performed with the arm held to the side at 0 ° of shoulder abduction. All measurements were taken bilaterally and the means of the throwing and non-throwing arms for IR and ER in the UCL group were compared to the means of the throwing and non-throwing arms in the healthy group. One-way ANOVAs were used to calculate differences between groups (p < 0.05).
RESULTS
Baseball players with UCL tears demonstrated significant rotator cuff strength deficits on their throwing arm IR (p < .001) and ER (p < .001) compared to throwing arm IR and ER in the Healthy (UCL IR = 131.3 ± 31.6 N; Healthy IR = 174.9 ± 20.7 N) (UCL ER = 86.4 ± 18.3 N; Healthy ER = 122.3 ± 18.3 N). On the non-throwing arm, the UCL group was weaker in both IR (135.0 ± 31.1 N; p < .001) and ER (93.4 ± 22.8 N; p < .001) than IR (172.1 ± 24.1 N) and ER (122.3 ± 19.1 N) in the Healthy group.
CONCLUSION
Participants with a UCL tear exhibit lower force values as an indication of isometric rotator cuff strength in both the throwing and non-throwing arms than a healthy cohort.
LEVEL OF EVIDENCE
Level 4.
背景
尺侧副韧带（UCL）撕裂在棒球运动员中很常见。人们认为肩袖力量的改变与棒球运动员的肩部和/或肘部损伤有关。
假设/目的：与健康棒球运动员投掷手臂的内旋（IR）和外旋（ER）力量相比，被诊断为UCL撕裂的棒球运动员将表现出内旋和外旋力量下降，以此作为投掷手臂等长肌力的指标。本研究的目的是比较受伤时患有UCL撕裂的棒球运动员与健康棒球运动员肩部的等长内旋和外旋力量。
研究设计
病例对照研究设计。
方法
33名参与者被诊断为UCL撕裂，33名是年龄和位置匹配的健康对照者。所有参与者均在高中或大学级别打棒球，并自愿参加该研究。在肩部外展0°时，将手臂保持在身体一侧，对等长肩袖力量进行内旋（IR）和外旋（ER）测量。所有测量均双侧进行，并将UCL组投掷手臂和非投掷手臂的IR和ER平均值与健康组投掷手臂和非投掷手臂的平均值进行比较。使用单因素方差分析来计算组间差异（p < 0.05）。
结果
与健康组投掷手臂的IR和ER相比，患有UCL撕裂的棒球运动员投掷手臂的IR（p < 0.001）和ER（p < 0.001）表现出明显的肩袖力量不足（UCL IR = 131.3 ± 31.6 N；健康组IR = 174.9 ± 20.7 N）（UCL ER = 86.4 ± 18.3 N；健康组ER = 122.3 ± 18.3 N）。在非投掷手臂上，UCL组的IR（135.0 ± 31.1 N；p < 0.001）和ER（93.4 ± 22.8 N；p < 0.001）均比健康组的IR（172.1 ± 24.1 N）和ER（122.3 ± 19.1 N）弱。
结论
与健康队列相比，患有UCL撕裂的参与者在投掷手臂和非投掷手臂上均表现出较低的力量值，以此作为等长肩袖力量的指标。
证据水平
4级。
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