Concurrent validity of actigraph-determined sedentary time against the Activpal under free-living conditions in a sample of bus drivers

Mato, Veronica Varela and Yates, Thomas and Stensel, David and Biddle, Stuart ORCID: and Clemes, Stacy A. (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. ISSN 1091-367X


This study explored the validity of ActiGraph-determined sedentary time (<50cpm, <100cpm, <150cpm, <200cpm, <250cpm) compared with the activPAL in a free-living sample of bus drivers. 28 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 vs activPAL sedentary time: 236±65 minutes). ROC 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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Submitted version made available in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 22 Nov 2019 04:32
Last Modified: 03 Jan 2020 01:47
Uncontrolled Keywords: bus drivers, sedentary behaviour, validation, ActiGraph, activPAL
Fields of Research (2008): 11 Medical and Health Sciences > 1199 Other Medical and Health Sciences > 119999 Medical and Health Sciences not elsewhere classified
11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110699 Human Movement and Sports Science not elsewhere classified
Fields of Research (2020): 42 HEALTH SCIENCES > 4299 Other health sciences > 429999 Other health sciences not elsewhere classified
42 HEALTH SCIENCES > 4207 Sports science and exercise > 420799 Sports science and exercise not elsewhere classified
Socio-Economic Objectives (2008): C Society > 92 Health > 9204 Public Health (excl. Specific Population Health) > 920401 Behaviour and Health
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