Willson John D, Davis Irene S
Physical Therapy Program, University of Wisconsin-LaCrosse, LaCrosse WI 54601, USA.
J Sport Rehabil. 2009 Feb;18(1):76-90. doi: 10.1123/jsr.18.1.76.
Lower extremity (LE) weakness might be associated with altered mechanics during weight bearing in subjects with patellofemoral pain syndrome (PFPS).
To analyze LE strength, mechanics, and the association between these variables among women with and without PFPS during a simulated athletic task.
Case control.
Motion-analysis laboratory.
20 women with PFPS and 20 healthy women.
Peak isometric lateral trunk-flexion, hip-abduction, hip external-rotation, knee-flexion, and knee-extension strength, as well as hip- and knee-joint excursions and angular impulses during single-leg jumps.
PFPS subjects produced less hip-abduction, hip external-rotation, and trunk lateral-flexion force than the control group. The PFPS group also demonstrated greater hip-adduction excursion and hip-abduction impulses. The association between the strength measurements and LE mechanics was low.
Women with PFPS demonstrate specific weaknesses and altered LE mechanics. Weakness is not, however, highly correlated with observed differences in mechanics.
在髌股疼痛综合征（PFPS）患者中，下肢（LE）无力可能与负重时力学改变有关。
分析患有和未患有PFPS的女性在模拟运动任务期间的下肢力量、力学以及这些变量之间的关联。
病例对照研究。
运动分析实验室。
20名患有PFPS的女性和20名健康女性。
等长峰值侧躯干屈曲、髋关节外展、髋关节外旋、膝关节屈曲和膝关节伸展力量，以及单腿跳跃期间的髋关节和膝关节活动度及角冲量。
与对照组相比，PFPS患者产生的髋关节外展、髋关节外旋和躯干侧屈力量较小。PFPS组还表现出更大的髋关节内收活动度和髋关节外展冲量。力量测量与下肢力学之间的关联较低。
患有PFPS的女性表现出特定的无力和下肢力学改变。然而，无力与观察到的力学差异高度不相关。
