title: Capturing the Interrelationship between Objectively Measured Physical Activity and Sedentary Behaviour in Children in the Context of Diverse Environmental Exposures.
abstract: Even though physical activity and sedentary behaviour are two distinct behaviours, their interdependent relationship needs to be studied in the same environment. This study examines the influence of urban design, neighbourhood built and social environment, and household and individual factors on the interdependent relationship between objectively measured physical activity and sedentary behaviour in children in the Canadian city of Saskatoon. Saskatoon's built environment was assessed by two validated observation tools. Neighbourhood socioeconomic variables were derived from 2006 Statistics Canada Census and 2010 G5 Census projections. A questionnaire was administered to 10-14 year old children to collect individual and household data, followed by accelerometry to collect physical activity and sedentary behaviour data. Multilevel logistic regression models were developed to understand the interrelationship between physical activity and sedentary behaviour in the context of diverse environmental exposures. A complex set of factors including denser built environment, positive peer relationships and consistent parental support influenced the interrelationship between physical activity and sedentary behaviour. In developing interventions to facilitate active living, it is not only imperative to delineate pathways through which diverse environmental exposures influence physical activity and sedentary behaviour, but also to account for the interrelationship between physical activity and sedentary behaviour.
authors.affiliation: Department of Community Health and Epidemiology, College of Medicine, University of Saskatchewan, Saskatoon S7N 5E5, Saskatchewan, Canada. tarun.katapally@usask.ca.|Johnson Shoyama Graduate School of Public Policy, University of Regina, Regina S4S 7H1, Saskatchewan, Canada. tarun.katapally@usask.ca.
authors.forename: Tarun R
authors.initials: TR
authors.lastname: Katapally
authors.affiliation: Department of Community Health and Epidemiology, College of Medicine, University of Saskatchewan, Saskatoon S7N 5E5, Saskatchewan, Canada. Nazeem.muhajarine@usask.ca.|Saskatchewan Population Health and Evaluation Research Unit (SPHERU), University of Saskatchewan and University of Regina, Saskatoon S7N 5E5, Saskatchewan, Canada. Nazeem.muhajarine@usask.ca.
authors.forename: Nazeem
authors.initials: N
authors.lastname: Muhajarine
mesh_terms: D061725:Accelerometry; D000293:Adolescent; D002170:Canada; D002648:Child; D002652:Child Behavior / Q000523:psychology*; D004781:Environmental Exposure; D015444:Exercise / Q000502:physiology*; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D009765:Obesity / Q000517:prevention & control; D012111:Residence Characteristics / Q000706:statistics & numerical data; D057185:Sedentary Behavior; D012931:Social Environment; D011795:Surveys and Questionnaires
keywords: active living research; built environment; children; ecological perspective; home environment; light physical activity; moderate to vigorous physical activity; sedentary behaviour; social environment; urban design