Article

OBJECTIVE: To examine intra-individual variability of kinetic and
temporal-spatial parameters of wheelchair propulsion as a function of shoulder
pain in manual wheelchair users (MWUs). DESIGN: Cohort. SETTING: University
research laboratory. PARTICIPANTS: Adults with physical disabilities (N=26) who
use a manual wheelchair for mobility full time (>80% ambulation). INTERVENTIONS:
Participants propelled their own wheelchairs with force-sensing wheels at a
steady-state pace on a dynamometer at 3 speeds (self-selected, 0.7m/s, 1.1m/s)
for 3 minutes. Temporal-spatial and kinetic data were recorded unilaterally at
the hand rim. MAIN OUTCOME MEASURES: Shoulder pain was quantified with the
Wheelchair Users Shoulder Pain Index. Intra-individual mean, SD, and coefficient
of variation (CV=mean/SD)
with kinetic and temporal-spatial metrics were
determined at the handrim. RESULTS: There were no differences in mean kinetic and
temporal-spatial metrics as a function of pain group (P values >.016). However,
individuals with pain displayed less relative variability (CV) in peak resultant
force and push time than pain-free individuals (P<.016). CONCLUSIONS: Shoulder
pain had no influence on mean kinetic and temporal-spatial propulsion variables
at the handrim; however, group differences were found in relative variability.
These results suggest that intra-individual variability analysis is sensitive to
pain. We propose that variability analysis may offer an approach for earlier
identification of MWUs at risk for developing shoulder pain.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS