The current study is a randomized controlled trial to test a novel 10-week climate-based intervention within pre-existing afterschool programs, designed to increase moderate-to-vigorous physical activity (MVPA) in underserved (low-income, minority status) middle school youth by addressing youth social developmental needs. Participants (n = 167; 56% female; 62% Black; 50% overweight/obese) enrolled in 6 middle schools were randomized to either the Connect through PLAY intervention or a wait-list control. Process evaluation measures (i.e., observations of external evaluators; staff surveys) indicated that essential elements were implemented with fidelity, and staff endorsed implementation ease/feasibility and acceptability. Regression analysis demonstrated that participation in the intervention (vs. control) was associated with an increase of 8.17 min of daily accelerometry-measured MVPA (56 min of additional weekly MVPA) at post-intervention controlling for baseline MVPA, school, gender, and weight status. The results provide support for social-motivational climate-based interventions for increasing MVPA in underserved youth that can inform future school-based health initiatives.

Trial Registration: NCT03850821: https://clinicaltrials.gov/ct2/show/study/NCT03850821?term=NCT03850821&rank=1

目前的研究是一项随机对照试验，目的是在现有的课后计划中测试一种新颖的为期 10 周的基于气候的干预措施，旨在增加服务不足（低收入、少数族裔）的中等至剧烈体力活动 (MVPA)。通过解决青年社会发展需求来帮助学校青年。就读于 6 所中学的参与者（n = 167；56% 为女性；62% 为黑人；50% 超重/肥胖）被随机分配到“通过 PLAY 连接”干预组或等候名单对照组。流程评估措施（即外部评估人员的观察；工作人员调查）表明基本要素得到了忠实的实施，工作人员认可了实施的容易性/可行性和可接受性。回归分析表明，在干预后控制基线 MVPA、学校、性别和体重时，参与干预（与对照相比）与每日加速计测量的 MVPA 增加 8.17 分钟（每周额外增加 56 分钟 MVPA）相关地位。研究结果为基于气候的社会动机干预措施提供了支持，以增加服务不足的青少年的 MVPA，从而为未来基于学校的健康举措提供信息。

试验注册： NCT03850821：https://clinicaltrials.gov/ct2/show/study/NCT03850821?term=NCT03850821&rank=1