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The validity and reliability of a novel activity monitor as a measure of walking
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Ryan, C. G., Grant, P. M., Tigbe, William W. and Granat, M. H. (2006) The validity and reliability of a novel activity monitor as a measure of walking. British Journal of Sports Medicine, 40 (9). pp. 779-784. doi:10.1136/bjsm.2006.027276
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Official URL: http://dx.doi.org/10.1136/bjsm.2006.027276
Abstract
Background: The accurate measurement of physical activity is crucial to understanding the relationship between physical activity and disease prevention and treatment.
Objective: The primary purpose of this study was to investigate the validity and reliability of the activPAL physical activity monitor in measuring step number and cadence.
Methods: The ability of the activPAL monitor to measure step number and cadence in 20 healthy adults (age 34.5±6.9 years; BMI 26.8±4.8 (mean±SD)) was evaluated against video observation. Concurrently, the accuracy of two commonly used pedometers, the Yamax Digi-Walker SW-200 and the Omron HJ-109-E, was compared to observation for measuring step number. Participants walked on a treadmill at five different speeds (0.90, 1.12, 1.33, 1.56, and 1.78 m/s) and outdoors at three self selected speeds (slow, normal, and fast).
Results: At all speeds, inter device reliability was excellent for the activPAL (ICC (2,1)⩾0.99) for both step number and cadence. The absolute percentage error for the activPAL was <1.11% for step number and cadence regardless of walking speed. The accuracy of the pedometers was adversely affected by slow walking speeds.
Conclusion: The activPAL monitor is a valid and reliable measure of walking in healthy adults. Its accuracy is not influenced by walking speed. The activPAL may be a useful device in sports medicine.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > Q Science (General) | ||||||||
| Divisions: | Faculty of Medicine > Warwick Medical School > Health Sciences Faculty of Medicine > Warwick Medical School > Health Sciences > Statistics and Epidemiology Faculty of Medicine > Warwick Medical School |
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| Journal or Publication Title: | British Journal of Sports Medicine | ||||||||
| Publisher: | B M J Group | ||||||||
| ISSN: | 0306-3674 | ||||||||
| Official Date: | September 2006 | ||||||||
| Dates: |
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| Volume: | 40 | ||||||||
| Number: | 9 | ||||||||
| Page Range: | pp. 779-784 | ||||||||
| DOI: | 10.1136/bjsm.2006.027276 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published |
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