Abstract：
An increased understanding of rotational strength as a potential prognostic factor for injury in contact and collision athletes may be important in planning return to sport. The aim of this study was to (1) determine the test-retest reliability of clinically relevant, angle-specific rotational and peak torque measurements in a cohort of uninjured collision and contact athletes; (2) develop a normal descriptive profile of angle-specific rotational torque measurements in the same cohort; and (3) examine the effects of direction and joint angle on shoulder rotational strength interlimb asymmetries. Twenty-three collision and contact athletes were recruited for the interday reliability substudy and 47 athletes were recruited for the remaining substudies. We used intraclass correlation coefficients with 95% confidence intervals to quantify interday reliability of all variables. We used a 2-way repeated-measures analysis of variance to analyze differences in absolute interlimb asymmetries. Interday reliability for the isokinetic strength variables was good to excellent (0.78-0.90) on the dominant side and moderate to good (0.63-0.86) on the nondominant side. Maximum angle-specific torque (as well as peak torque) can be measured reliably in internally and externally rotated positions. A normal profile of clinically relevant, angle-specific shoulder rotational torque measurements for collision and contact athletes has been established which provides a reference when assessing shoulder strength in this population.
摘要：
对旋转强度作为接触和碰撞运动员受伤的潜在预后因素的更多了解对于计划重返运动可能很重要。本研究的目的是(1)确定临床相关的重测可靠性，在一组未受伤的碰撞和接触运动员中进行特定角度的旋转和峰值扭矩测量；（2）在同一队列中开发特定角度的旋转扭矩测量的正常描述性轮廓；（3）检查方向和关节角度对肩部旋转强度的影响肢体间不对称。招募了23名碰撞和接触运动员进行日间可靠性子研究，并招募了47名运动员进行其余子研究。我们使用具有95％置信区间的组内相关系数来量化所有变量的日间可靠性。我们使用双向重复测量方差分析来分析绝对肢体间不对称性的差异。等速强度变量的日间可靠性在优势侧良好至优异（0.78-0.90），在非优势侧中等至良好（0.63-0.86）。可以在内部和外部旋转位置可靠地测量最大角度比扭矩（以及峰值扭矩）。临床相关的正常情况，已建立了碰撞和接触运动员的特定角度的肩部旋转扭矩测量值，为评估该人群的肩部力量提供了参考。
