TRIAL OF ACTIVITY FOR ADOLESCENT GIRLS - FIELD CENTER

本研究的主要目的是探讨以学校为基础，以社区为纽带的综合干预措施对中学女生身体活动和身体素质的影响。将确定介导干预效果的因素，并观察干预对烟草使用、酒精使用和抑郁症的影响。将开展一项多中心协作研究。在五个实地中心的每一个中心，六个中学集水区将配对，并随机分配到干预组和对照组。在干预汇水地区，将实施基于生态模式和社会认知理论的多组成部分干预。 将修改学校体育课程，以强调在课堂上参与中等至剧烈的体育活动，并掌握与体育活动有关的行为技能。 学校将与至少两个社区组织建立关系，这些组织将为学校所在地的女孩提供课后和夏季体育活动计划。此外，将在社区环境中扩大女孩的课后、周末和夏季体育活动方案。将对学校保健方案的几个组成部分进行修改，以便将女孩与扩大的体育活动方案机会联系起来。女孩将在7年级和8年级接受干预。身体活动，身体素质，其他健康特征和心理社会/环境因素与身体活动的基线措施将在6年级的春天管理，并将在7，8和9年级期间重新管理此测量电池。为了确定干预效果，将使用混合模型方差分析对体力活动和健身数据进行统计分析，将集水区（嵌套在治疗中）作为分析单位。据推测，干预措施将显着降低通常的速度下降的身体活动和健身之间看到的女孩6日和8日年级。这项研究将独特和显着扩大我们的知识，促进，决定因素和健康的好处，体育活动在中学女生。

The major purpose of the proposed investigation is to examine the effects of a comprehensive, school-based, community-linked intervention on physical activity and physical fitness in middle school girls. Factors that mediate the effect of the intervention will be identified, and the intervention's impact on tobacco use, alcohol use, and depressive symptomatology will be observed. A collaborative, multi-center investigation will be conducted. At each of five field centers, six middle school catchment areas will be pair-matched and randomly assigned to intervention and control groups. In the intervention catchment areas a multi-component intervention, based on an ecological model and Social Cognitive Theory, will be implemented. The school physical education curriculum will be modified to emphasize in-class participation in moderate to vigorous physical activity and mastery of behavioral skills related to physical activity. Relationships will be established between the school and at least two community organizations that will provide after- school and summer physical activity programs for girls at the school site. in addition, after-school, weekend, and summer physical activity programs for girls will be expanded in community settings. Modifications will be made in several components of the school health program to link girls to the expanded physical activity program opportunities. Girls will be exposed to the intervention during their 7th and 8th grade years. Baseline measures of physical activity, physical fitness, other health characteristics and psychosocial/environmental factors related to physical activity will be administered during the spring of the 6th grade year, and this measurement battery will be re-administered during the 7th, 8th and 9th grade years. To determine intervention effects, statistical analyses of the physical activity and fitness data will be performed using mixed- model analysis of variance, with catchrnent area (nested within treatment) taken as the unit of analysis. It is hypothesized that the intervention will significantly reduce the usual rates of decline in physical activity and fitness seen in girls between the 6th and 8th grades. This study will uniquely and markedly expand our knowledge of promotion, determinants, and health benefits of physical activity in middle school girls.