The overarching objective of the study is to obtain a comprehensive understanding of the salient factors predicting changes in physical activity (PA) during adolescents’ transition into emerging adulthood. Using the Multi-Process Action Control model as our guiding framework, we will examine how implicit and explicit psychological processes along with regulatory practices impact PA change during this major life transition. Additionally, we will use a real-time data capture method called Ecological Momentary Assessment to further investigate how environmental and contextual factors, and momentary psychosocial influences effect PA patterns across this dynamic life stage. The ADAPT study is a 4-year project comprised of two interrelated studies. Study I is a large prospective cohort study that will invite all grade 11 students across one large school board (a total of seven secondary schools) to participate by completing an online questionnaire. Using a cluster randomization approach, a subset of students from each school will be invited to participate in Study II, whereby participants will wear an accelerometer and complete Ecological Momentary Assessments 5 times a day over a 7-day study period. For both studies, following baseline assessments, there will be three annual follow-up assessments approximately 12 months apart. The current study represents one of the largest longitudinal cohort studies examining PA and its determinants and associated consequences among adolescents transitioning out of high school into emerging adulthood. Findings from this study will provide a much more in-depth understanding of how and why changes in PA behaviour occur across this first major life transition.

中文翻译：

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ADAPT研究的方法和设计：IntegratedD方法在理解向成年期过渡过程中的身体活动中的应用。

这项研究的总体目标是全面了解预测青少年过渡到成年期期间体育活动（PA）变化的显着因素。使用多过程行动控制模型作为我们的指导框架，我们将研究在这一主要的生活过渡过程中，隐性和显性的心理过程以及监管实践如何影响PA的变化。此外，我们将使用称为“生态瞬间评估”的实时数据捕获方法来进一步调查环境和上下文因素以及瞬时心理社会因素如何在此动态生活阶段影响PA模式。ADAPT研究是一个为期4年的项目，由两项相互关联的研究组成。研究I是一项大型的前瞻性队列研究，它将通过填写在线问卷来邀请一个大型学校董事会（总共7所中学）中的所有11年级学生参加。使用聚类随机方法，将邀请每所学校的一部分学生参加研究II，在此过程中，参与者将在7天的研究期内每天佩戴加速度计并完成5次生态矩评估。对于这两项研究，在进行基线评估之后，将有大约12个月的间隔进行三个年度随访评估。当前的研究是最大的纵向队列研究之一，研究了从高中过渡到成年期的青少年中的PA及其决定因素和相关后果。