标题：One, Two, Three Strikes and You’re Out? Examining Youth Physical Activity in the Context of the Health Promoting Secondary Schools Model and Teacher Job Action.
摘要：C oncern about the health of Canadian adolescents has greatly increased over the past decade particularly related to physical inactivity where a majority of children are not active enough to reap health benefits (Colley et al., 2011). Because physical activity (PA) is established during the formative years, the consequences of this inactivity can have long term health impacts in terms of chronic diseases (Lee et al., 2012). School-based programmes have the potential to reach the greatest number and most diverse population of children (Kriemler et al., 2011). In particular, comprehensive school health (CSH) programmes are considered one of the best investments for improving PA levels as they address learning, policy and supports across the school setting, and require involvement from the students, teachers, administrators and community. Further, we know that the school context is fundamental to promoting PA via physical education (PE) classes, organized sport, and casual activities outside of class time (Storey et al., 2011). Clearly, schools have an important role in promoting PA.
