Grant: Master's Award: Canada Graduate Scholarships

Children; Compositional Data Analysis; Environment; Epidemiology; Geographic Information System; Neighbourhood; Physical Activity; Residence Characteristics; Sedentary Behaviour; Sleep

" The 24-hour movement behaviour composition refers to the relative proportions of the 24-hour day devoted to different intensities of physical activity, sedentary behaviour, and sleep. Recent research suggests that the 24-hour movement behaviour composition is more important for health than is the time spent in any individual movement behaviour. Features of the neighbourhood built environment influence children's movement. Although studies have examined the associations between the neighbourhood environment and physical activity, sedentary behaviour, and sleep on their own, research has not yet considered which neighbourhood environment features are associated with the 24-hour movement behaviour composition. Therefore, the objective of my research will be to determine what neighbourhood built environment features are beneficially associated with the 24-hour movement behaviour composition among children. My research will use data from 458 children aged 10–13 years. Time spent in the different movement behaviours was measured over seven days using accelerometers. I will use a variety of Geographic Information System databases to measure several built environment features, such as walkability, traffic safety, and artificial lights, within each participants' neighbourhood. I will then apply compositional data analysis, a complex and advanced statistical approach, to examine associations between neighbourhood built environment features and the 24-hour movement behaviour composition. "