Article

OBJECTIVE: To evaluate, in a community hip osteoarthritis sample, the
cross-sectional associations of isometric strength and steadiness of the knee
extensors and their interaction with physical performance measures of physical
function. DESIGN: Cross-sectional. SETTING: Human movement laboratory of a
university. PARTICIPANTS: Sixty-seven adults (27 men and 40 women; age, 61+/-10
y) with radiographically confirmed symptomatic hip osteoarthritis. INTERVENTIONS:
Not applicable.
MAIN OUTCOME MEASURES: Participants performed isometric knee
extensor steadiness and strength testing on a dynamometer. Physical function was
assessed by using the habitual timed walk test and the self- and fast-paced
stair-climbing tests. RESULTS: In the hierarchical regression models, although
there were clear main effects of knee extensor steadiness on fast-paced stair
performance, greater knee steadiness predictively associated with faster
stair-climbing performance particularly in individuals with high knee extensor
strength. In contrast, knee extensor steadiness was not related to gait speed
regardless of knee extensor strength levels.
CONCLUSIONS: In patients with hip
OA, knee extensor steadiness was positively associated with stair-climbing
performance, particularly in those with high levels of knee extensor strength.
These findings are of importance in developing intervention strategies, but they
call for further study.
CI - Copyright 2010 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS