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Concurrent validity of ActiGraph-determined sedentary time against the activPAL under free-living conditions in a sample of bus drivers
journal contributionposted on 2017-07-06, 12:16 authored by Veronica Varela-MatoVeronica Varela-Mato, Thomas E. Yates, David StenselDavid Stensel, Stuart J.H. Biddle, Stacy ClemesStacy Clemes
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.
The research was supported by the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre.
- Sport, Exercise and Health Sciences
Published inMeasurement in Physical Education and Exercise Science
CitationVARELA-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.
Publisher© Taylor & Francis
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis 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