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Title: Concurrent validity of ActiGraph-determined sedentary time against the activPAL under free-living conditions in a sample of bus drivers
Authors: Varela-Mato, Veronica
Yates, Thomas E.
Stensel, David J.
Biddle, Stuart J.H.
Clemes, Stacy A.
Keywords: Actigraph
Bus drivers
Sedentary behavior
Issue Date: 2017
Publisher: © Taylor & Francis
Citation: VARELA-MATO, V. ... et al, 2017. Concurrent validity of ActiGraph-determined sedentary time against the activPAL under free-living conditions in a sample of bus drivers. Measurement in Physical Education and Exercise Science, 21(4), pp.212-222.
Abstract: This study explored the validity of ActiGraph-determined sedentary time (<50 cpm, <100 cpm, <150 cpm, <200 cpm, <250 cpm) compared with the activPAL in a free-living sample of bus drivers. Twenty-eight participants were recruited between November 2013 and February 2014. Participants wore an activPAL3 and ActiGraph GT3X+ concurrently for 7 days and completed a daily diary. Time spent sedentary during waking hours on workdays, non-workdays, during working-hours, and non-working hours were compared between instruments. During working hours, all ActiGraph cut-points significantly underestimated sedentary time (p < 0.05), whereas during non-working hours the <50 cpm cut-point demonstrated the closest agreement (ActiGraph sedentary time: 250 ± 75 minutes versus activPAL sedentary time: 236 ± 65 minutes). Receiver operating characteristic analyses revealed that on workdays and non-workdays the ActiGraph cut-points exhibited relatively low sensitivity (all <0.62) and specificity (all <0.49) values. The use of the ActiGraph to measure sedentary time in this understudied, highly sedentary and at risk occupational group is not recommended.
Description: This is an Accepted Manuscript of an article published by Taylor & Francis in Measurement in Physical Education and Exercise Scienceon 22 Jun 2017, available online: http://dx.doi.org/10.1080/1091367X.2017.1335204
Sponsor: The research was supported by the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre.
Version: Accepted for publication
DOI: 10.1080/1091367X.2017.1335204
URI: https://dspace.lboro.ac.uk/2134/25709
Publisher Link: http://dx.doi.org/10.1080/1091367X.2017.1335204
ISSN: 1091-367X
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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