Measuring free-living physical activity in adults with and without neurologic dysfunction with a triaxial accelerometer

作者：Hale Leigh A^*; Pal Jaya; Becker Ines

来源：Archives of Physical Medicine and Rehabilitation, 2008, 89(9): 1765-1771.

DOI：10.1016/j.apmr.2008.02.027

• exercise
• neurologic manifestation
• questionnaires
• rehabilitation

Objective: To investigate the reliability, validity, and utility of a triaxial accelerometer to measure physical activity in the free-living environment in adults with and Without neurologic dysfunction.
Design: Repeated-measures design.
Setting: General community.
Participants: Volunteer sample of 17 men and 30 women (age range, 28-91y) living in the community with stroke of greater than 6 months in duration (n=20), Parkinson disease (n=7), or multiple sclerosis (n= 11), and healthy but sedentary controls (n=9).
Interventions: Not applicable.
Main Outcome Measures: Physical activity measured with the TriTrac RT3 accelerometer, 7-day recall questionnaire, and activity diary.
Results: The accelerometer reliably Measured free-living physical activity (intraclass correlation coefficient,.85; 95% confidence interval,.74-.91; P=.000). The standard error of measurement indicated that a second test Would differ from a baseline test by +/- 23%. Mean daily RT3 data collected in the first 3 days differed significantly from that of the mean daily RT3 data collected over 7 days. The RT3 appeared to distinguish level of mobility better than the 7-day recall questionnaire, and participants found the RT3 to be a User-friendly and acceptable measure of physical activity.
Conclusions: The triaxial accelerometer provided a stable measure of free-living physical activity, was found to distinguish between people with varying levels of mobility, and was well tolerated by participants. The results indicate that collecting data for 3 days was not reflective of data collected over 7 days.

• 出版日期2008-9