Identifying and Disentangling Social and Physical Environmental Effects on Physical Activity in Diverse Adolescent and Young Adult Populations

识别和理清社会和物理环境对不同青少年和青少年身体活动的影响 青壮年人口 项目摘要和摘要 这个K01奖项的目的是为Leah Frerichs博士提供发展支持，使其成为一名独立的 青年参与研究的调查员使用移动技术和系统科学方法来理清和 解决社会和身体环境对身体活动的影响。年体力活动水平大幅下降 青春期和青壮年。在这些发育时期，新出现的证据表明， 体育环境对体育活动行为的形成起着至关重要的作用。然而，我们在以下方面存在严重差距 理清不同社交过程的影响(基于行为和相似性的友谊启动与 采用朋友的行为)，并共同暴露在外部影响下，如建立活动促进 活动行为的环境特征，特别是在农村低收入社区的非裔美国青年中。 梳理这些相互交织的环境影响需要高有效性、细粒度的、关于真实环境的纵向数据 青少年的社交网络、环境暴露和活动行为的时间变化。有了这款K01，Frerichs博士将 以她在社区研究和系统科学方面的经验为基础，获得正式的教学和实践 指导纵向社会网络和空间分析方法，加速度计数据的处理和分析， 移动技术数据收集方法，制定基于网络和移动的干预策略，以及 社会和行为研究伦理和研究中负责任的行为。拟议的研究包括次要研究 分析使用智能手机中嵌入的传感器收集的丰富数据，这些传感器提供有关社交网络的实时客观数据 大学生之间的互动、地理编码位置数据和体力活动水平。Frerichs博士将使用 二次分析的结果和经验，为一项针对青少年的初步数据收集研究提供信息 农村的非裔美国人。有了这些数据和高级网络建模技术，我们将检查 有关网络、环境和行为的未解答问题。你的同龄人的活动对你的 自己的活动？或者你的活动行为决定了你的同龄人是谁？做一些你与之互动的空间 你的同伴会影响你的活动水平吗？此外，我们将在关键的青春期研究这些问题，以 年轻的成年人群体，包括在一个农村的非裔美国人社区，在那里我们有严重的研究空白。 最后，Frerichs博士将使用创新的青年参与和参与式系统科学方法来转化 对新的社会和自然环境干预策略的研究结果。拟议的培训和专家指导 该团队将为Frerichs博士提供成功竞争R01资金所需的一套技能和初步数据 并作为青年参与的干预研究领域的领导者，使用移动技术来解决 社会和物质环境对服务不足社区肥胖相关生活方式行为的影响。

Identifying and disentangling social and physical environmental effects on physical activity in diverse adolescent and young adult populations PROJECT SUMMARY AND ABSTRACT The purpose of this K01 award is to provide developmental support to Dr. Leah Frerichs to become an independent investigator in youth-engaged research using mobile technology and systems science methods to disentangle and address social and physical environment influences on physical activity. Physical activity levels dramatically decrease in adolescence and young adulthood. During these developmental periods, emerging evidence indicates the social and physical environment plays a critical role in shaping physical activity behaviors. However, we have a critical gap in disentangling the effects of different social processes (friendship initiation based on behaviors and similarities versus adoption of friend’s behaviors) and shared exposures to exogenous influences such as activity-promoting built environment features on activity behaviors, especially among African American youth in rural, low-income communities. Teasing apart these intertwined environmental influences requires high-validity, fine-grained, longitudinal data on real- time changes in youth’s social networks, environmental exposures and activity behaviors. With this K01, Dr. Frerichs will build on her experience in community-based research and systems science to obtain formal didactic and hands-on instruction in longitudinal social network and spatial analysis methods, processing and analysis of accelerometry data, mobile technology data collection methods, development of network- and mobile-based intervention strategies, and social and behavioral research ethics and responsible conduct in research. The proposed studies include a secondary analysis of rich data collected using sensors embedded in smartphones that provided real-time objective data on social interactions, geo-coded location data, and physical activity levels among college students. Dr. Frerichs will use the findings and experience from the secondary analysis to inform a primary data collection study with adolescent youth in a rural, African American population. With these data and advanced network modeling techniques, we will examine unanswered questions about networks, environments, and behavior. How much does your peers’ activity influence your own activity? Or do your activity behaviors determine who your peers are? And do the spaces where you interact with your peers influence your activity levels? Furthermore, we will examine these questions across critical adolescence to young adult populations, including within a rural African American community where we have critical research gaps. Finally, Dr. Frerichs will use innovative youth-engaged and participatory systems science methods to translate the findings into new social and physical environment intervention strategies. The proposed training and expert mentoring team will provide Dr. Frerichs with the set of skills and preliminary data needed to successfully compete for R01 funding and to serve as a leader in the field of youth-engaged intervention research that uses mobile technology to address social and physical environment influences on obesity-related lifestyle behaviors in underserved communities.