title: Is the relationship between sedentary behaviour and cardiometabolic health in adolescents independent of dietary intake? A systematic review.
abstract: Screen time, but not overall sedentary behaviour, is consistently related to cardiometabolic health in adolescents. Because of the associations screen time has with dietary intake, diet may be an important factor in the screen time and health relationship; however, evidence has not previously been synthesized. Thus, the aim of this systematic review was to explore whether the associations between various sedentary behaviours and cardiometabolic risk markers are independent of dietary intake in adolescents. Online databases and personal libraries were searched for peer-reviewed original research articles published in English before March 2014. Included studies assessed associations between sedentary behaviour and cardiometabolic markers in 12- to 18-year-olds and adjusted for dietary intake. Twenty-five studies met the inclusion criteria. From the 21 studies examining sedentary behaviour and adiposity, the majority found significant positive associations between television viewing, screen time and self-reported overall sedentary behaviour with markers of adiposity, independent of dietary intake. No significant associations between screen time with blood pressure and cholesterol were reported. Sedentary behaviour appears to be associated with adiposity in adolescents, irrespective of dietary intake. However, the variability of dietary variables between studies suggests further work is needed to understand the role of dietary intake when examining these associations in youth.
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Vic., Australia.
authors.forename: E
authors.initials: E
authors.lastname: Fletcher
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Vic., Australia.
authors.forename: R
authors.initials: R
authors.lastname: Leech
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Vic., Australia.
authors.forename: S A
authors.initials: SA
authors.lastname: McNaughton
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Vic., Australia.|Baker IDI Heart and Diabetes Institute, Melbourne, Vic., Australia.|Department of Medicine, Monash University, Melbourne, Vic., Australia.|School of Population Health, The University of Queensland, Brisbane, Qld, Australia.|Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Vic., Australia.|School of Sport Science, Exercise and Health, The University of Western Australia, Perth, WA, Australia.
authors.forename: D W
authors.initials: DW
authors.lastname: Dunstan
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Vic., Australia.
authors.forename: K E
authors.initials: KE
authors.lastname: Lacy
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Vic., Australia.
authors.forename: J
authors.initials: J
authors.lastname: Salmon
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D002318:Cardiovascular Diseases / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D002149:Energy Intake; D005247:Feeding Behavior / Q000523:psychology*; D015438:Health Behavior; D006801:Humans; D063766:Pediatric Obesity / Q000150:complications / Q000503:physiopathology / Q000517:prevention & control*; D012307:Risk Factors; D057185:Sedentary Behavior; D013690:Television; D018910:Video Games; D015430:Weight Gain
keywords: Adolescents; cardiometabolic; diet; screen time