Authors: Felton, Gwen M.; Tudor-Locke, Catrine; Burkett, Lee

Source: Research Quarterly for Exercise and Sport, Volume 77, Number 3, September 2006 , pp. 304-308(5)

Publisher: American Alliance for Health, Physical Education, Recreation & Dance

Abstract:

This study examined stability and reliability of free-living physical activity assessed by pedometer in 69 young female college students (M age = 18.7 years, SD = 1.2, range: 18-25 years; body mass index = 23.2 kg/m², SD = 0.6) for two complete weeks (Week 1 and Week 2) separated by 12 weeks. During Week 1, participants took an average of 8,880 steps/day, SD = 3,219, range: 1,858-19,480; during Week 2 9,088 steps/day, SD = 3,299, range 1,736-16,837; t (68) = −.568, p = .572. In both weeks, only Sunday differed significantly (repeated measures analysis of variance; Week 1: p < .0001; Week 2: p < .01) from all other days of the week. The computed intraclass correlation between weeks was moderate (.72). Group mean pedometer-determined physical activity was stable across 2 weeks separated by 12 weeks in this young, healthy sample of women. Individuals within these groups held their rank order to a moderate extent over time. These findings provide important evidence of the reliability of pedometer-determined physical activity data and are of practical importance to study design.

Keywords: EXERCISE; MEASUREMENT; MOTION SENSORS; WALKING

Document Type: Research article

DOI: http://dx.doi.org/10.5641/027013606X13080769704884

Publication date: 2006-09-01

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