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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.
|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 paper is closed access until 22nd December 2018.|
|Sponsor: ||The research was supported by the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre.|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.1080/1091367X.2017.1335204|
|Appears in Collections:||Closed Access (Sport, Exercise and Health Sciences)|
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