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首页> 外文期刊>Orthopaedic Journal of Sports Medicine >The Relationship Between Humeral Retrotorsion and Shoulder Range of Motion in Baseball Players With an Ulnar Collateral Ligament Tear
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The Relationship Between Humeral Retrotorsion and Shoulder Range of Motion in Baseball Players With an Ulnar Collateral Ligament Tear

机译：尺侧副韧带撕裂的棒球运动员肱骨回缩与肩部运动范围的关系

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Background: Humeral retrotorsion has been investigated in relation to shoulder range of motion (ROM) in healthy baseball players. Currently, there is limited information on the osseous anatomy and development of ulnar collateral ligament (UCL) tears. Purpose: To determine the relationship between humeral retrotorsion and shoulder ROM in baseball players with a UCL tear. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Fifty-four baseball players (mean age, 18.5 ± 2.0 years) with a UCL tear volunteered for this study. Participants were measured bilaterally for shoulder internal (IR) and external rotation (ER) ROM and humeral retrotorsion. Differences between sides (involved to uninvolved) were used to calculate the glenohumeral internal rotation deficit (GIRD), external rotation ROM difference (ERDiff), total rotational motion difference (TRM), and humeral retrotorsion difference (HTDiff). A multivariate regression analysis was performed with GIRD, ERDiff, and TRM regressing on HTDiff. Univariate analysis was performed to further evaluate the effect of the predictors on each outcome separately. To control for the effect of age, weight, duration of symptoms, and years of experience, the variables were included as covariates. An a priori level was set at P < .05. Results: There was a statistically significant relationship between the GIRD, ERDiff, and TRM results compared with HTDiff ( P = .003). Independent analysis revealed a statistically significant relationship between GIRD and HTDiff ( P = .004) and between ERDiff and HTDiff ( P = .003) but no significant relationship between TRM and HTDiff ( P = .999). After adjusting for age, weight, duration of symptoms, years of experience, dominant arm, and position, a significant relationship was found between GIRD and HTDiff ( P = .05) and between ERDiff and HTDiff ( P = .01). No significant relationship was found between TRM and HTDiff ( P = .54). Adjusted univariate regression analysis determined that HTDiff explains approximately 16% of the variance in GIRD ( r ~(2)= 0.158) and approximately 24% of the variance in ERDiff ( r ~(2)= 0.237). Conclusion: In baseball players with a UCL tear, approximately 16% of the variance in GIRD and 24% of the variance in ERDiff can be attributed to differences found in humeral retrotorsion between sides. This indicates that humeral retroversion contributes significantly to GIRD and increased ER ROM in baseball players. Recognition of differences in humeral retrotorsion between the dominant and nondominant upper extremities may help explain some but not all of the changes in shoulder ROM commonly seen in baseball players.
机译：背景：在健康的棒球运动员中，相对于肩部运动范围（ROM）进行了肱骨后退研究。目前，关于尺侧副韧带（UCL）眼泪的骨解剖结构和发育的信息有限。目的：确定UCL撕裂的棒球运动员的肱骨后退与肩部ROM之间的关系。研究设计：横断面研究;证据等级，3。方法：54名棒球运动员（平均年龄18.5±2.0岁）自愿参加UCL泪液研究。双向测量参与者的肩部内部（IR）和外部旋转（ER）ROM和肱骨后倾。两侧之间的差异（涉及到未涉及）被用来计算肱肱内旋转缺损（GIRD），外旋ROM差异（ERDiff），总旋转运动差异（TRM）和肱骨后倾角差异（HTDiff）。使用GIRD，ERDiff和TRM在HTDiff上回归进行多元回归分析。进行单变量分析以进一步评估预测因子对每种结局的影响。为了控制年龄，体重，症状持续时间和经验年限的影响，将变量作为协变量包括在内。先验水平设置为P <.05。结果：与HTDiff相比，GIRD，ERDiff和TRM结果之间存在统计学上的显着关系（P = .003）。独立分析显示，GIRD与HTDiff之间（P = .004）和ERDiff与HTDiff之间（P = .003）在统计上具有显着关系，而TRM与HTDiff之间没有显着的关系（P = .999）。在调整了年龄，体重，症状持续时间，经验年限，优势臂和位置之后，发现GIRD和HTDiff之间存在显着关系（P = .05），ERDiff和HTDiff之间存在显着关系（P = .01）。在TRM和HTDiff之间未发现显着关系（P = .54）。调整后的单变量回归分析确定，HTDiff解释了GIRD中大约16％的方差（r〜（2）= 0.158）和ERDiff中大约24％的方差（r〜（2）= 0.237）。结论：在有UCL撕裂的棒球运动员中，GIRD差异的大约16％和ERDiff差异的24％可以归因于两侧肱骨后倾的差异。这表明肱骨逆行对GIRD的贡献显着，并增加了棒球运动员的ER ROM。认识到上肢和非上肢在肱骨后退方面的差异可能有助于解释棒球运动员中常见的肩部ROM的部分但不是全部变化。

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