Article

OBJECTIVE: To determine whether pre-injury hip muscle weakness is associated with
the development of patellofemoral pain (PFP) in high school running athletes.
Prospective cohort study. SETTING: Academic institution sports medicine
center. PARTICIPANTS:
High school running athletes. METHODS: Baseline hip
strength of high school running athletes was assessed at the beginning of the
running season. Strength testing was repeated in athletes who developed PFP. Peak
hip muscle strengths and strength ratios were compared between the injured and
non-injured groups. RESULTS: Six injuries occurred in 5 of the 98 subjects who
completed the study. The baseline hip external-to-internal strength ratio was
lower in injured than in uninjured subjects (P = .008). In the injured group, hip
abduction and external rotation strengths decreased from pre-injury to
post-injury (P = .002 and P = .01, respectively). Logistic regression analysis
demonstrated that a greater baseline hip abduction strength (odds ratio = 5.35,
95% confidence interval [CI] 1.46-19.53; P < .01) and abduction-to-adduction
strength ratio increased the risk of injury (odds ratio = 14.14, 95% CI
0.90-221.06; P = .05), and a greater pre-injury hip external-to-internal rotation
strength ratio decreased the risk of injury (odds ratio < 0.01, 95% CI </= .01,
0.44; P = .02). CONCLUSIONS: The findings of the current study suggest that
stronger pre-injury hip abductors (particularly in relation to their hip
adductors) and weaker pre-injury hip external rotators (particularly in relation
to their hip internal rotators) are associated with the development of PFP. In
addition, persons in whom PFP develops appear to lose hip abduction and external
rotation strength when compared with their pre-injury strength. Finally, a higher
hip external-to-internal rotation strength ratio may protect against the development of PFP.
CI - Copyright (c) 2011 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS