Article

OBJECTIVE: To analyze change over 6 months in accelerometer-measured physical
activity for participants with arthritis in a physical activity promotion trial.
We tested the hypothesis that participants with the highest baseline functional
capacity, regardless of their intervention status, experienced the greatest
increases in physical activity levels at 6-month follow-up. DESIGN: At baseline,
participants were interviewed in person, completed a 5-minute timed walk, and
wore a biaxial accelerometer for 1 week, with a subsequent week of accelerometer
wear at 6 months. We present data on the changes in accelerometer-measured
physical activity across baseline function quartiles derived from participants'
walking speed. Analyses were controlled for sociodemographic, health status, and
seasonal covariates as well as exposure to the study's behavioral intervention.
SETTING: A Midwest academic medical center. PARTICIPANTS: Participants (N=226)
with knee osteoarthritis or rheumatoid arthritis currently enrolled in the
Improving Motivation for Physical Activity in Persons With Arthritis Clinical
Trial. INTERVENTION: Counseling by physical activity coaches versus control group
physician advice to exercise. MAIN OUTCOME MEASURE: Change in average daily
counts between baseline and 6-month follow-up. RESULTS: Contrary to our
hypothesis, and after controlling for other predictors of change, the lowest
quartile function participants had the largest mean absolute and relative
physical improvement over baseline, regardless of intervention group status.
CONCLUSIONS: Participants at a higher risk of immanent mobility loss may have
been more committed to improve lifestyle physical activity, reflecting the wisdom
of targeting older adults at risk of mobility loss for physical activity behavior
change interventions.
CI - Copyright (c) 2012 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS