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Relationship between hip abductor strength and external hip and knee adduction moments in medial knee osteoarthritis

journal contribution
posted on 06.12.2017, 00:00 by Crystal KeanCrystal Kean, K Bennell, T Wrigley, R Hinman
Background: Alterations in hip abductor strength and hip and knee adduction moments during gait are associated with knee osteoarthritis. This study examines the relationship between hip abductor strength and hip and knee adduction moments during gait in individuals with symptomatic medial knee osteoarthritis. Methods: Ninety-nine participants underwent maximal isometric hip abductor strength testing and 3D gait analysis. Pearson correlations examined relationships between non-normalized maximal hip abductor strength (Nm), peak external hip and knee adduction moments (Nm) and knee adduction moment impulse (Nm∙s). Linear regressions examined these relationships while controlling for body size (height and mass) and walking speed. Findings: Positive relationships existed between non-normalized hip abductor strength and hip and knee adduction moments (r = 0.28 and 0.37, respectively, p < 0.01) as well as the knee adduction moment impulse (r = 0.47, p < 0.01). However, after controlling for body size and walking speed, hip abductor strength was not a significant predictor of hip or knee adduction moments (B = − 0.08, and 0.04, respectively, p > 0.05) but was a significant predictor of knee adduction moment impulse (B = 0.05, p = 0.005), explaining 6% of the variance. Interpretation: While a significant relationship between hip abductor strength and knee adduction moment impulse was noted, hip abductor strength only explained a small amount of variance in the impulse. Our findings support previous research of healthy individuals and those with mild to moderate knee osteoarthritis and suggests hip abductor strength has little influence on hip and knee adduction moments during gait.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

30

Issue

3

Start Page

226

End Page

230

Number of Pages

5

eISSN

1879-1271

ISSN

0268-0033

Location

UK

Publisher

Pergamon Press

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Not affiliated to a Research Institute; School of Medical and Applied Sciences (2013- ); University of Melbourne;

Era Eligible

Yes

Journal

Clinical biomechanics.