TXT Me: Texting Motivational Messages Encouraging Adolescent PA

描述（由申请人提供）：本申请旨在发展一项创新的干预措施，促进14-17岁青少年的身体活动，并评估其可行性。干预以自我决定理论为指导，旨在增强青少年的自主性、能力感和亲和感，并最终增强身体活动的内在驱动动机，从而增加身体活动持续增加的可能性。以一种持续的方式增加体育活动最终将降低肥胖和某些癌症的风险。

DESCRIPTION (provided by applicant):This application proposes to develop an innovative intervention that promotes physical activity to 14-17 year olds and assess its feasibility. The intervention is guided by Self Determination Theory and seeks to enhance adolescents' feelings of autonomy, competence, and relatedness, and ultimately, internally-driven motivation to be physically active, thereby increasing the likelihood of sustainable increases in physical activity. Increasing physical activity in a manner that will be sustained will ultimately decrease risk of both obesity and certain cancers. PUBLIC HEALTH RELEVANCE: This application will test the feasibility of promoting PA to 14-17 year olds using text messages tailored to constructs from Self Determination Theory. Promoting PA to adolescents in a manner that is familiar, convenient, and acceptable has the potential to increase PA, thus reducing risk of both obesity and chronic disease, such as certain cancers.