The accuracy of personal activity monitoring devices |
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| Affiliation: | 1. Department of Surgery, Central Finland Central Hospital, Keskussairaalantie 19, 40620 Jyväskylä, Finland;2. Department of Plastic Surgery, University of Helsinki and Helsinki University Hospital, HUS, Finland;3. Group Administration, University of Helsinki and Helsinki University Hospital, HUS, Finland;4. Department of Health and Social Management, Research Centre for Comparative Effectiveness and Patient Safety, University of Eastern Finland, Kuopio, Finland;5. Eira Hospital, Helsinki, Finland |
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| Abstract: | Activity monitoring has important applications in orthopaedic and medical research. There is a paucity of information on device accuracy. Thirty adults tested the accuracy of 10 devices in 5 activities: walk 400-M, run 400-M, walk 10-M, ascend and descend 10 steps. A second protocol tested slow walking speeds at 1.0, 1.5, 1.8, and 2.0 MPH. The waist-based devices FitBit One and Omron HJ-321 were >90% accurate for all activities. The wristband devices and Smartphone Apps were <90% accurate for most activities. The StepWatch Activity Monitor was >95% accurate at lower cadence activities, but undercounted running by ~25%. Waist-based, dedicated activity monitors are highly accurate in a variety of activities. |
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| Keywords: | Activity monitor Activity tracker Pedometer |
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