Understanding influences on physical activity and sedentary behaviour from preschool to preadolescence

虽然促进儿童时期最佳水平的身体活动和久坐行为对健康很重要，但在这一领域仍有许多未知之处。这项研究将扩大现有的儿童队列，这些儿童在3至5岁时被招募，并在6至8岁时进行跟踪，在9至11岁时重新评估这些儿童。队列的新成员包括从学龄前到青春期的长期跟踪，生态框架的应用，以及使用地理信息系统收集目标邻里数据。研究结果将为以个人、家庭和邻里层面为重点的政策和干预措施提供重要信息，以改善儿童时期的体力活动和久坐行为水平。

While promotion of optimal levels of physical activity and sedentary behaviours during childhood is important for health, much remains unknown in this field. This study will extend an existing cohort of children, recruited at ages three to five years and followed up at six to eight years by reassessing these children at nine to eleven years. Novel additions to the cohort include long term follow-up spanning preschool to preadolescence, application of an ecological framework, and collection of objective neighbourhood data using a Geographical Information System. Findings will provide important information for policy and interventions focused at the individual, family and neighbourhood level, to improve physical activity and sedentary behaviour levels across childhood.