Reliability of Scores from Physical Activity Monitors in Adults with Multiple Sclerosis

in Adapted Physical Activity Quarterly

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Robert W. Motl
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Weimo ZhuUniversity of Illinois at Urbana-Champaign

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Youngsik ParkUniversity of Illinois at Urbana-Champaign

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Edward McAuleyUniversity of Illinois at Urbana-Champaign

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Jennifer A. ScottUniversity of Illinois at Urbana-Champaign

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Erin M. SnookUniversity of Illinois at Urbana-Champaign

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We examined the reliability of scores from physical activity monitors in a sample of 193 individuals with multiple sclerosis (MS) who wore a pedometer and an accelerometer for a 7-day period. There were no significant differences among days for the pedometer (p = .12) or the accelerometer (p = .15) indicating that week and weekend days can be analyzed in a single intra-class correlation (ICC) analytic model. The 7 days of monitoring yielded ICC estimates of .93 for both the pedometer and accelerometer, and a minimum of 3 days yielded a reliability of .80 for both the pedometer and accelerometer. Results indicated that physical activity monitor scores are reliable measures of physical activity for individuals with MS.

The authors are with the Department of Kinesiology and Community Health at the University of Illinois, Urbana-Champaign, IL. E-mail: robmotl@uiuc.edu.

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