Effect of Knee Valgus Angle during Single Leg Squat and Horizontal Hop for Distance in Patients with Patellofemoral Pain and Controls

Hussain Ghulam
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Abstract

Background: Patellofemoral pain (PFP) is considered one of the most common dysfunctions of the lower extremities. Faulty lower limb mechanics and increased of knee valgus on loaded tasks are believed to play an important role in the development of PFP. Objective: To figure out if male PFP patients during single leg horizontal hop for distance and squat with greater knee valgus than controls, and if the nature of the task changes the angles of knee valgus. Methods: Twenty males with unilateral PFP formed the patient group and forty-five asymptomatic males formed the control group. Two dimensional (2-D) frontal plane projection angle (FPPA) was used during single leg squatting and horizontal hop for distance tasks. Results: For the single leg squat, the mean of 6.96°, 9.80°, 15.04° was reported in the control, PFP asymptomatic knee, and PFP symptomatic knee, respectively. For the single leg horizontal hop for distance, the mean of 11.63°, 13.72°, 19.17° was reported in the control, PFP asymptomatic knee, and PFP symptomatic knee, respectively. These differences were significant (p < 0.002) for both tasks. Conclusions: Patients with PFP represented with greater knee valgus angle than what was found in either their asymptomatic limb or in the control group.
膝外翻角对髌股疼痛患者单腿深蹲和水平跳距离的影响及控制
背景:髌股痛(PFP)被认为是最常见的下肢功能障碍之一。下肢力学缺陷和负重任务时膝关节外翻的增加被认为在PFP的发展中起重要作用。目的:了解男性PFP患者在单腿水平跳距离和深蹲运动中是否有较大的膝关节外翻,以及该运动的性质是否改变了膝关节外翻的角度。方法:男性单侧PFP患者20例为患者组,男性无症状患者45例为对照组。在单腿深蹲和水平跳跃的距离任务中使用二维额平面投影角(FPPA)。结果:单腿深蹲时,对照组、PFP无症状膝关节和PFP有症状膝关节的平均深蹲度分别为6.96°、9.80°、15.04°。对于单腿水平跳距离,对照组、PFP无症状膝关节和PFP有症状膝关节的平均跳距分别为11.63°、13.72°和19.17°。两项任务的差异均显著(p < 0.002)。结论:与无症状肢体或对照组相比,PFP患者的膝关节外翻角度更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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