Article

OBJECTIVE: To compare performance error and perceived difficulty during toe-out
gait modification in people with knee osteoarthritis (OA) across 3 different
types of visual feedback: mirror, raw video, and real-time biofeedback of toe-out
angle. DESIGN: Repeated-measures, within-subject trial. SETTING: University
motion analysis laboratory. PARTICIPANTS: Individuals with knee OA (N=20; 11
women; mean age, 65.4+/-9.8y) participated in this study. Seven participants had
mild knee OA, 9 had moderate knee OA, and 4 had severe knee OA. INTERVENTIONS:
Participants were trained to walk on a treadmill while matching a target
indicating a 10 degrees increase in stance phase toe-out compared with toe-out
angle measured during self-selected walking. The target was provided visually via
the 3 types of feedback listed above and were presented in a random order. MAIN
OUTCOME MEASURES: Kinematic data were collected and used to calculate the
difference between the target angle and the actual performed angle for each
condition (toe-out performance error). Difficulty was assessed using a numerical
rating scale (0-10) provided verbally by participants. RESULTS: Toe-out
performance error was significantly less when using the real-time biofeedback
method than when using the other 2 methods (P=.025; mean difference vs
mirror=2.05 degrees ; mean difference vs raw video=1.51 degrees ). Perceived
difficulty was not statistically different between the groups (P=.51).
CONCLUSIONS: Although statistically significant, the 2 degrees difference in
toe-out gait performance error may not necessitate the large economic and
personnel costs of real-time biofeedback as a means to modify movement in
clinical or research settings.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS