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Int. J. Environ. Res. Public Health 2018, 15(7), 1296; https://doi.org/10.3390/ijerph15071296

Wear-Time Compliance with a Dual-Accelerometer System for Capturing 24-h Behavioural Profiles in Children and Adults

1
School of Sport and Recreation, Auckland University of Technology, Auckland 1142, New Zealand
2
School of Engineering, Computer and Mathematical Sciences, Auckland University of Technology, Auckland 1142, New Zealand
3
Centre for Longitudinal Research, University of Auckland, Auckland 1142, New Zealand
*
Author to whom correspondence should be addressed.
Received: 15 May 2018 / Revised: 15 June 2018 / Accepted: 19 June 2018 / Published: 21 June 2018
(This article belongs to the Special Issue Health Impact of 24-Hour Movement Behaviour and Time Use)
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Abstract

To advance the field of time-use epidemiology, a tool capable of monitoring 24 h movement behaviours including sleep, physical activity, and sedentary behaviour is needed. This study explores compliance with a novel dual-accelerometer system for capturing 24 h movement patterns in two free-living samples of children and adults. A total of 103 children aged 8 years and 83 adults aged 20-60 years were recruited. Using a combination of medical dressing and purpose-built foam pouches, participants were fitted with two Axivity AX3 accelerometers—one to the thigh and the other to the lower back—for seven 24 h periods. AX3 accelerometers contain an inbuilt skin temperature sensor that facilitates wear time estimation. The median (IQR) wear time in children was 160 (67) h and 165 (79) h (out of a maximum of 168 h) for back and thigh placement, respectively. Wear time was significantly higher and less variable in adults, with a median (IQR) for back and thigh placement of 168 (1) and 168 (0) h. A greater proportion of adults (71.6%) achieved the maximum number of complete days when compared to children (41.7%). We conclude that a dual-accelerometer protocol using skin attachment methods holds considerable promise for monitoring 24-h movement behaviours in both children and adults. View Full-Text
Keywords: physical activity; sedentary behaviour; measurement; accelerometry; motion sensors; time-use epidemiology physical activity; sedentary behaviour; measurement; accelerometry; motion sensors; time-use epidemiology
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Duncan, S.; Stewart, T.; Mackay, L.; Neville, J.; Narayanan, A.; Walker, C.; Berry, S.; Morton, S. Wear-Time Compliance with a Dual-Accelerometer System for Capturing 24-h Behavioural Profiles in Children and Adults. Int. J. Environ. Res. Public Health 2018, 15, 1296.

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