BACKGOUND Dynamic valgus has been the focus of many studies to identify its association to an increased risk of running-related injuries. However, it is not known which physical and biomechanical variables are associated with this movement dysfunction. RESEARCH QUESTION This study aimed to test the correlation between strength, flexibility and biomechanical variables and dynamic valgus in female runners. METHODS Twenty-nine healthy females ran on a treadmill at 2.92 m/s and performed strength, range of motion and endurance tests. Pelvic, hip and ankle kinematics were measured with a 3D motion analysis system. Six multiple linear regression models were used to identify the ability of physical and biomechanical variables to predict excursion and peak of contralateral pelvic drop, hip adduction and internal rotation. RESULTS Contralateral pelvic drop and hip adduction were positively correlated to ankle eversion and step cadence. Hip internal rotation had a negative correlation with ankle eversion. Despite significance, predictor variables explained less than 30% of dynamic valgus variance during running. No interest variable had significant correlation with the hip strength and hip and ankle passive range of motion. SIGNIFICANCE The results showed that distal joint kinematics and spatiotemporal variables should be considered during biomechanical running analysis to identify their possible relationship with joint overload caused by dynamic valgus. Caution should be taken when linking hip disorders during running to posterolateral hip strength and stiffness, core endurance, and ankle dorsiflexion range of motion since no correlation occurred amongstthese variables in this sample of female runners.

中文翻译：

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髋部的力量，柔韧性和跑步生物力学能预测女性休闲跑步者的动态外翻吗？

背景技术动态外翻一直是许多研究的重点，以鉴定其与跑步相关伤害风险增加的关联。但是，尚不知道哪些物理和生物力学变量与这种运动功能障碍有关。研究问题本研究旨在检验女性跑步者的力量，柔韧性和生物力学变量与动态外翻之间的相关性。方法29名健康女性以2.92 m / s的速度在跑步机上跑步，并进行了强度，运动范围和耐力测试。使用3D运动分析系统测量骨盆，臀部和踝关节的运动学。使用六个多元线性回归模型来确定物理和生物力学变量预测对侧骨盆下降，髋内收和内旋的偏移和峰值的能力。结果对侧骨盆下降和髋关节内收与踝外翻和步频呈正相关。髋关节内部旋转与踝关节外翻呈负相关。尽管有重要意义，但预测变量无法解释跑步过程中动态外翻方差的30％以下。没有兴趣变量与髋部力量以及髋部和踝部的被动运动范围有显着相关性。意义该结果表明，在进行生物力学运行分析时应考虑远端关节运动学和时空变量，以确定它们与动态外翻引起的关节超负荷的可能关系。将跑步过​​程中的髋关节疾病与后外侧髋关节的力量和僵硬，核心耐力，