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Joint associations of multiple leisure-time sedentary behaviours and physical activity with obesity in Australian adults

Sugiyama, Takemi, Healy, Genevieve N., Dunstan, David W., Salmon, Jo and Owen, Neville 2008, Joint associations of multiple leisure-time sedentary behaviours and physical activity with obesity in Australian adults, International journal of behavioral nutrition and physical activity, vol. 5, no. 35, pp. 1-6.

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Title Joint associations of multiple leisure-time sedentary behaviours and physical activity with obesity in Australian adults
Author(s) Sugiyama, Takemi
Healy, Genevieve N.
Dunstan, David W.
Salmon, Jo
Owen, Neville
Journal name International journal of behavioral nutrition and physical activity
Volume number 5
Issue number 35
Start page 1
End page 6
Publisher BioMed Central Ltd
Place of publication London, England
Publication date 2008
ISSN 1479-5868
Summary Background
Television viewing and physical inactivity are independently associated with risk of obesity. However, how the combination of multiple leisure-time sedentary behaviours (LTSB) and physical activity (LTPA) may contribute to the risk of obesity is not well understood. We examined the joint associations of multiple sedentary behaviours and physical activity with the odds of being overweight or obese.

Methods
A mail survey collected the following data from adults living in Adelaide, Australia (n = 2210): self-reported height, weight, six LTSB, LTPA and sociodemographic variables. Participants were categorised into four groups according to their level of LTSB (dichotomised into low and high levels around the median) and LTPA (sufficient: ≥ 2.5 hr/wk; insufficient: < 2.5 hr/wk). Logistic regression analysis examined the odds of being overweight or obese (body mass index ≥ 25 kg/m2) by the combined categories.

Results
The odds of being overweight or obese relative to the reference category (low sedentary behaviour time and sufficient physical activity) were: 1.54 (95% confidence interval [CI]: 1.20–1.98) for the combination of low sedentary behaviour time and insufficient physical activity; 1.55 (95% CI: 1.20–2.02) for the combination of high sedentary behaviour time and sufficient physical activity; and 2.26 (95% CI: 1.75–2.92) for the combination of high sedentary behaviour time and insufficient physical activity.

Conclusion
Those who spent more time in sedentary behaviours (but were sufficiently physically active) and those who were insufficiently active (but spent less time in sedentary behaviour) had a similar risk of being overweight or obese. Reducing leisure-time sedentary behaviours may be as important as increasing leisure-time physical activity as a strategy to fight against obesity in adults.
Notes This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Language eng
Field of Research 111706 Epidemiology
Socio Economic Objective 920205 Health Education and Promotion
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2008, Sugiyama et al
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017756

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