title: Metabolically healthy obesity: what is the role of sedentary behaviour?
abstract: OBJECTIVE
  The role of sedentary behaviour in metabolically healthy obesity is unknown. We examined cross-sectional differences in television viewing time across metabolic and obesity phenotypes, hypothesizing that healthy obese individuals spend less time viewing television than their unhealthy counterparts.
  
  
  METHODS
  A nationally representative sample of 4931 older adults in England (mean age 65.1; SD=8.9 years) was drawn from the 2008/9 wave of the English Longitudinal Study of Ageing. Average weekly television viewing time was derived from two questions about weekday and weekend viewing. Obesity was defined as body mass index ≥ 30 kg/m(2), and metabolically healthy as having <2 metabolic abnormalities (low HDL-cholesterol, high triglycerides, high blood pressure, hyperglycaemia, high inflammation).
  
  
  RESULTS
  After adjusting for covariates including chronic illness, functional limitations and physical activity, mean weekly viewing times were 4.7 (95% confidence interval 2.9, 6.5), 5.8 (2.5, 9.0) and 7.8 (5.7, 9.8) h higher in unhealthy non-obese, healthy obese, and unhealthy obese groups respectively, compared to the healthy non-obese group (p for heterogeneity <0.001).
  
  
  CONCLUSIONS
  A common type of leisure-time sedentary behaviour varies across metabolic and obesity phenotypes. However, healthy obesity is not explained through differences in leisure-time sedentary behaviour.
authors: Department of Epidemiology & Public Health, University College London, 1-19 Torrington Place, London WC1E 6BT, UK. Electronic address: joshua.bell.11@ucl.ac.uk.
authors: Joshua A
authors: JA
authors: Bell
authors: Department of Epidemiology & Public Health, University College London, 1-19 Torrington Place, London WC1E 6BT, UK.
authors: Mika
authors: M
authors: Kivimaki
authors: Department of Epidemiology & Public Health, University College London, 1-19 Torrington Place, London WC1E 6BT, UK.
authors: G David
authors: GD
authors: Batty
authors: Department of Epidemiology & Public Health, University College London, 1-19 Torrington Place, London WC1E 6BT, UK.
authors: Mark
authors: M
authors: Hamer
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology*; D000368:Aged; D000375:Aging / Q000502:physiology; D015992:Body Mass Index; D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology / Q000523:psychology; D004739:England / Q000453:epidemiology; D005260:Female; D006304:Health Status; D006801:Humans; D016014:Linear Models; D008137:Longitudinal Studies; D008297:Male; D009765:Obesity / Q000453:epidemiology / Q000235:genetics / Q000378:metabolism*; D011446:Prospective Studies; D057185:Sedentary Behavior; D012737:Sex Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D013690:Television / Q000706:statistics & numerical data*
keywords: Metabolic health; Obesity; Sedentary behaviour; Television viewing