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Published on: April 21, 2017
Validity of physical activity measures in ambulatory individuals with multiple sclerosis
Robert W Motl1, Edward McAuley, Erin M Snook
1Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA. robmotl@uiuc.edu
Purpose:
The literature suggests that individuals with multiple sclerosis (MS) engage in less physical activity than non-diseased individuals. That conclusion, however, depends upon the validity of scores from measures of physical activity among the MS population. This study evaluated the validity of scores from two self-report surveys, a pedometer, and an accelerometer and during seven days of free-living conditions among individuals with MS.
Method:
Participants were 30 individuals (28 females, two males) with an established definite diagnosis of MS. The participants wore a pedometer and a single-axis accelerometer during the waking hours of a 7-day period. After the 7-day period, participants returned to the lab and completed a self-administered physical activity questionnaire and then underwent a 7-day physical activity recall.
Results:
There were strong correlations (a) between scores from the two self-report measures of physical activity and (b) between scores from the two objective measures of physical activity, and (c) weaker, but moderate-to-strong correlations between scores from the self-report and objective measures of physical activity.
Conclusion:
Our results support the quantification of physical activity among those with MS using validated self-report and objective measures.
