Article

OBJECTIVE: To examine the efficacy of a physical activity behavioral intervention
for improving outcomes of body composition in persons with multiple sclerosis
(MS). DESIGN: Secondary analysis of data from a randomized controlled trial.
SETTING: University research laboratory. PARTICIPANTS: Ambulatory persons with MS
(N=82). INTERVENTION: A 6-month, internet-delivered physical activity behavioral
intervention designed to increase lifestyle physical activity, primarily walking.
The behavioral intervention was based on principles of social cognitive theory.
MAIN OUTCOME MEASURES: Whole-body bone mineral content (BMC), bone mineral
density (BMD), and soft tissue composition, using dual-energy x-ray
absorptiometry. RESULTS: There were no significant differences between conditions
posttrial on body composition outcomes using the adjusted critical value
(P<.008). There was a significant effect of the intervention on whole-body BMC
(P=.04, omega(2)<.001) and BMD (P=.01, omega(2)=.003) using the unadjusted
critical value (P<.05). The effect of the intervention on percent body fat
(P=.09, omega(2)=.001) and whole-body fat mass (P=.05, omega(2)=.003) approached
significance using unadjusted criteria. There was not a significant effect on
whole-body lean soft tissue (P=.28, omega(2)<.001) or body mass index (P=.86,
omega(2)<.001). CONCLUSIONS: Our results provide preliminary evidence that an
internet-delivered lifestyle physical activity intervention might improve bone
health and body composition in MS. Such findings are important considering that
physical activity is a modifiable behavior with the potential to confer long-term
benefits for the prevention and management of fracture risk and comorbidities
among those with MS.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS