Article

Hip and knee joint motion in the transverse and frontal plane during
running may increase patellofemoral joint stress and contribute to the etiology
of patellofemoral joint pain.
We evaluated the association between these
kinematics and the magnitude and timing of gluteus medius and maximus activity
during running in females with patellofemoral pain. We also compared the
magnitude and timing of gluteal muscle activity during running between females
with and without patellofemoral pain. METHODS: Twenty females with patellofemoral
pain and twenty females without knee pain participated in this study.
Three-dimensional running kinematics, gluteus medius and gluteus maximus onset
time, activation duration, mean activation level, and peak activation level were
recorded simultaneously. Gluteal muscle timing and activation level were compared
between groups using independent t-tests. The association of gluteal muscle
activation parameters running kinematics in females with patellofemoral pain was
quantified using Pearson correlation coefficients. FINDINGS: Females with
patellofemoral pain demonstrated delayed (P=0.028, effect size=0.76) and shorter
(P=0.01, effect size=0.88) gluteus medius activation than females without knee
pain during running. The magnitude and timing of gluteus maximus activation was
not different between groups. Greater hip adduction and internal rotation
excursion was correlated with later gluteus medius and gluteus maximus onset,
respectively. INTERPRETATION: Neuromuscular control differences of the gluteal
muscles appear to exist among females with patellofemoral pain during running.
Interventions to facilitate earlier activation of these muscles may be warranted
among females with patellofemoral pain who demonstrate altered running
kinematics.
CI - Copyright (c) 2011 Elsevier Ltd. All rights reserved.

Langue : ANGLAIS