title: Associations between objectively measured habitual physical activity and adiposity in children and adolescents: Systematic review.
abstract: This review examined recent evidence on associations between objectively measured habitual physical activity and adiposity. A search for observational studies was carried out using several electronic databases from June 2004-June 2008. Of 1 255 potentially eligible papers, 47 papers were included, which described 48 studies. Most studies (41/48; 85%) were cross-sectional and 31/48 (65%) used proxies for adiposity, such as body mass index (BMI) or BMI z-score as the outcome measure. Few studies (10%; 5/48) focused on pre-school children. There was consistent evidence of negative associations between objectively measured physical activity and adiposity: significant negative associations were observed in 38/48 (79%) of studies overall. The present review supports the hypothesis that higher levels of habitual physical activity are protective against child and adolescent obesity. However, prospective longitudinal studies are warranted; there is a need for more research on younger children, and for more 'dose-response' evidence.
authors: Department of Health and Human Performance, Faculty of Physical Activity and Sport Sciences-INEF, Technic University of Madrid, Spain. davidjimenez@ugr.es
authors: David
authors: D
authors: Jiménez-Pavón
authors: Joanna
authors: J
authors: Kelly
authors: John J
authors: JJ
authors: Reilly
mesh_terms: D050154:Adiposity; D000293:Adolescent; D000294:Adolescent Behavior; D015992:Body Mass Index; D002648:Child; D002652:Child Behavior; D002675:Child, Preschool; D019317:Evidence-Based Medicine; D015444:Exercise; D005260:Female; D006184:Habits; D015438:Health Behavior; D006801:Humans; D008019:Life Style; D008297:Male; D009765:Obesity / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D057185:Sedentary Behavior