Altered hip and trunk muscle function in individuals with patellofemoral pain

Cowan, S. M., Crossley, K. M. and Bennell, K. L. (2009) Altered hip and trunk muscle function in individuals with patellofemoral pain. British Journal of Sports Medicine, 43 8: 584-588. doi:10.1136/bjsm.2008.053553

Author Cowan, S. M.
Crossley, K. M.
Bennell, K. L.
Title Altered hip and trunk muscle function in individuals with patellofemoral pain
Journal name British Journal of Sports Medicine   Check publisher's open access policy
ISSN 0306-3674
Publication date 2009-08
Sub-type Article (original research)
DOI 10.1136/bjsm.2008.053553
Volume 43
Issue 8
Start page 584
End page 588
Total pages 5
Place of publication London, United Kingdom
Publisher BMJ Group
Language eng
Formatted abstract
Objective: The purpose of this study was to investigate the role of hip muscles in patellofemoral pain (PFP), specifically by investigating neuromotor control, strength and range of motion of the hip muscles.
Design: Cross-sectional.
Setting: University laboratory.
Patients: Ten participants diagnosed with PFP and 27 asymptomatic controls were recruited, using standard inclusion and exclusion criteria.
Main outcome measures: Electromyographic activity of the vasti and anterior gluteus medius (GM) were recorded using surface electrodes and posterior GM using fine wire electrodes while the participant completed a stair-stepping task. Hip strength and trunk side flexion strength was assessed using a hand-held dynamometer and hip range of motion with an inclinometer. Pain and disability measures were recorded for the PFP participants.
Results: When individuals with PFP completed the stair-stepping task there was a delay in activation of both anterior and posterior GM (p<0.02) and an alteration in vasti control (pā€Š=ā€Š0.001). In addition, trunk side flexion strength was significantly less (29%) in individuals with PFP (pā€Š=ā€Š0.03).
Conclusion: This study provides evidence that trunk side flexion strength and neuromotor control of the GM are affected in people with PFP. This study also confirms the presence of a delayed vastus medialis obliquus relative to vastus lateralis, providing further evidence underpinning the importance of retraining the vasti function in patients with PFP.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Health and Rehabilitation Sciences Publications
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