Valerie Carson|Stephen Hunter|Nicholas Kuzik|Casey Gray|Veronica J. Poitras|Jean?Philippe Chaput|Travis J. Saunders|Peter T. Katzmarzyk|Anthony D. Okely|Sarah Connor Gorber|Michelle E. Kho|Margaret Sampson|Helena Lee|Mark S. Tremblay
Systematic review of sedentary behaviour and health indicators in school-aged children and youth: an update
University of Alberta|University of Alberta|University of Alberta|Children's Hospital of Eastern Ontario|Children's Hospital of Eastern Ontario|Children's Hospital of Eastern Ontario|University of Prince Edward Island|Pennington Biomedical Research Center|University of Wollongong|Public Health Agency of Canada|McMaster University|Children's Hospital of Eastern Ontario|University of Alberta|Children's Hospital of Eastern Ontario
systematic review update examining relationships objectively subjectively measured sedentary behaviour health indicators children youth aged 517 years embase psycinfo medline searched december 2014 date limits imposed february 2010 included studies peerreviewed met prioridetermined population apparently healthy children youth mean age 517 years intervention durations patterns types sedentary behaviours comparator various durations patterns types sedentary behaviours outcome critical body composition metabolic syndromecardiovascular disease risk factors behavioural conductprosocial behaviour academic achievement important fitness selfesteem study criteria quality evidence outcome assessed using grading recommendations assessment development evaluation framework due heterogeneity narrative analysis conducted total 235 studies 194 unique samples included representing 1 657 064 unique participants 71 different countries higher durationsfrequencies screen time television tv viewing associated unfavourable body composition higher durationfrequency tv viewing also associated higher clustered cardiometabolic risk scores higher durations tv viewing video game use associated unfavourable behavioural conductprosocial behaviour higher durations reading homework associated higher academic achievement higher duration screen time associated lower fitness higher durations screen time computer use associated lower selfesteem evidence ranged low moderate quality higher quality studies using reliable valid sedentary behaviour measures confirm largely observational evidence