Energy expenditure during common sitting and standing tasks: examining the 1.5 MET definition of sedentary behaviour

Mansoubi, Maedeh and Pearson, Natalie and Clemes, Stacy A. and Tolfrey, Keith and Edwardson, Charlotte L. and Yates, Thomas and Biddle, Stuart J. H. and Bodicoat, Danielle H. (2015) Energy expenditure during common sitting and standing tasks: examining the 1.5 MET definition of sedentary behaviour. BMC Public Health, 15. pp. 1-8.

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Abstract

Background: Sedentary behavior is defined as any waking behavior characterized by an energy expenditure of 1.5 METS or less while in a sitting or reclining posture. This study examines this definition by assessing the energy cost (METs) of common sitting, standing and walking tasks.

Methods: Fifty one adults spent 10 min during each activity in a variety of sitting tasks (watching TV, Playing on the Wii, Playing on the PlayStation Portable (PSP) and typing) and non-sedentary tasks (standing still, walking at 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, and 1.6 mph). Activities were completed on the same day in a random order following an assessment of resting metabolic rate (RMR). A portable gas analyzer was used to measure oxygen uptake, and data were converted to units of energy expenditure (METs).

Results: Average of standardized MET values for screen-based sitting tasks were: 1.33 (SD: 0.24) METS (TV), 1.41 (SD: 0.28) (PSP), and 1.45 (SD: 0.32) (Typing). The more active, yet still seated, games on the Wii yielded an average of 2.06 (SD: 0.5) METS. Standing still yielded an average of 1.59 (SD: 0.37) METs. Walking MET values increased incrementally with speed from 2.17 to 2.99 (SD: 0.5 - 0.69) METs.

Conclusions: The suggested 1.5 MET threshold for sedentary behaviors seems reasonable however some sitting based activities may be classified as non-sedentary. The effect of this on the definition of sedentary behavior and associations with metabolic health needs further investigation.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version made available under open access.
Faculty / Department / School: No Faculty
Date Deposited: 02 May 2017 07:21
Last Modified: 24 Apr 2018 02:41
Uncontrolled Keywords: energy expenditure; MET; physical activity; sedentary behaviour; adult; basal metabolism; cross-over studies; energy metabolism; female; health status; humans; male; middle aged; obesity; physical examination; play and playthings; recreation; reference standards; sedentary lifestyle; video games; young adult
Fields of Research : 11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110602 Exercise Physiology
Socio-Economic Objective: C Society > 92 Health > 9299 Other Health > 929999 Health not elsewhere classified
Identification Number or DOI: 10.1186/s12889-015-1851-x
URI: http://eprints.usq.edu.au/id/eprint/31809

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