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J Sport Rehabil. 2009 Feb;18(1):76-90.

Lower extremity strength and mechanics during jumping in women with patellofemoral pain.

Author information

  • 1Physical Therapy Program, University of Wisconsin-LaCrosse, LaCrosse WI 54601, USA.

Abstract

CONTEXT:

Lower extremity (LE) weakness might be associated with altered mechanics during weight bearing in subjects with patellofemoral pain syndrome (PFPS).

OBJECTIVE:

To analyze LE strength, mechanics, and the association between these variables among women with and without PFPS during a simulated athletic task.

DESIGN:

Case control. Setting: Motion-analysis laboratory.

SUBJECTS:

20 women with PFPS and 20 healthy women.

MAIN OUTCOME MEASURES:

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.

RESULTS:

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.

CONCLUSIONS:

Women with PFPS demonstrate specific weaknesses and altered LE mechanics. Weakness is not, however, highly correlated with observed differences in mechanics.

PMID:
19321908
[PubMed - indexed for MEDLINE]
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