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: 18 May 2017 06:10
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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