Article

OBJECTIVE: To determine which lower limb strength and joint kinetic and kinematic
parameters distinguish sit-to-stand (STS) performance of older adults with
symptomatic knee osteoarthritis (OA) with higher and lower chair stand time.
SETTING: Motion analysis laboratory. PARTICIPANTS:
Individuals (N=49; 26 men, 23 women) aged 50 to 79 years (mean +/- SD age,
64.7+/-8.1y) with radiographic knee OA and daily symptoms, stratified by chair
stand times. INTERVENTIONS: Not applicable. MAIN : Lower limb
strength and STS strategy. RESULTS: The chair stand times (mean +/- SD) in the
high-, moderate-, and low-functioning groups in men were 6.5+/-0.7, 8.6+/-0.7,
and 11.5+/-1.3 seconds, respectively, and in women were 7.6+/-1.2, 10.0+/-0.5,
and 12.8+/-1.8 seconds, respectively. Chair stand time (P=.0391) and all measures
of lower limb strength (all P<.0001) differed by sex. In men, no strength measure
differed between groups, whereas in women hip abductor strength on the more
affected side differed between groups. In men, sagittal hip range of motion (ROM)
(P=.0122) differed between groups, and there was a trend toward a difference in
sagittal knee power (P=.0501) during STS, while in women only sagittal knee ROM
(P=.0392) differed between groups. CONCLUSIONS: Higher- and lower-functioning
adults with symptomatic knee OA appear to use different strategies when standing
from a chair. Higher-functioning men flexed more at the hip and produced greater
knee power than lower-functioning men. Higher-functioning women used less knee
flexion than lower-functioning women. Since STS is an important mobility task,
these parameters may serve as foci for rehabilitation aimed at reducing mobility
limitations.
CI - Copyright (c) 2013 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS