Instituto Brasil de Tecnologias da Saúde, Rua Visconde de Pirajá 595, room 1201, Ipanema, 22410-003, Rio de Janeiro, Brazil; Programa de Engenharia Biomédica, Universidade Federal do Rio de Janeiro, Brazil.
Instituto Brasil de Tecnologias da Saúde, Rua Visconde de Pirajá 595, room 1201, Ipanema, 22410-003, Rio de Janeiro, Brazil; Programa de Pós Graduação em Radiologia Clínica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil.
Gait Posture. 2020 Jun;79:217-223. doi: 10.1016/j.gaitpost.2020.05.006. Epub 2020 May 12.
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.
This study aimed to test the correlation between strength, flexibility and biomechanical variables and dynamic valgus in female runners.
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.
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.
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.
动态外翻已成为许多研究的焦点，以确定其与跑步相关损伤风险增加的关联。然而，目前尚不清楚哪些物理和生物力学变量与这种运动功能障碍有关。
本研究旨在测试女性跑步者的力量、柔韧性和生物力学变量与动态外翻之间的相关性。
29 名健康女性以 2.92m/s 的速度在跑步机上跑步，并进行力量、活动范围和耐力测试。使用三维运动分析系统测量骨盆、臀部和踝关节运动学。使用六个多元线性回归模型来确定身体和生物力学变量预测对侧骨盆下降、髋关节内收和内旋幅度和峰值的能力。
对侧骨盆下降和髋关节内收与踝关节外翻和步频呈正相关。髋关节内旋与踝关节外翻呈负相关。尽管有意义，但预测变量在跑步时仅能解释不到 30%的动态外翻变异性。没有一个变量与髋关节力量以及髋关节和踝关节被动活动范围有显著相关性。
结果表明，在进行生物力学跑步分析时，应考虑远端关节运动学和时空变量，以确定它们与由动态外翻引起的关节过载之间的可能关系。在本女性跑步者样本中，这些变量之间没有相关性，因此在将跑步时的髋关节问题与髋关节后外侧的力量和刚度、核心耐力以及踝关节背屈活动范围联系起来时应谨慎。
