Background The purpose was to explore whether baseline sociodemographic and physical characteristics moderated effects of an intervention on moderate-to-vigorous physical activity (MVPA), percent body fat, body mass index z -score, and cardiorespiratory fitness (CRF) at post intervention, relative to the control condition. Methods A secondary analysis of data from a group randomized trial including 24 schools (12 intervention and 12 control; N = 1519 girls) was conducted. Age, ethnicity, race, socioeconomic status, and pubertal stage were assessed via survey. Height, weight, MVPA (min/h), percent body fat, and CRF were measured. Mixed-effects linear models were performed. Results Compared to the control, the intervention increased overweight and obese girls’ CRF ( b = 0.28, p = 0.049; b = 0.31, p < 0.01, respectively), but not healthy weight girls’ CRF ( b = 0.04, p = 0.706). Pre- to mid-puberty girls in the intervention group had slightly lower post-intervention MVPA than those in the control (3.04 vs. 3.31, p = 0.055), while late to post-puberty intervention and control girls’ post-intervention MVPA was similar (3.12 vs. 3.04, p = 0.542). Conclusions A PA intervention can improve overweight and obese girls’ CRF, possibly attenuating their cardiovascular risk. Effective strategies are needed to assist adolescent girls, especially those in pre- to mid-puberty, in maintaining their MVPA after an intervention ends. Impact Moderators of physical activity intervention effects among adolescent girls are important to identify because the effectiveness of these interventions to date in this population has been limited. This article contributes to the notable gap in knowledge regarding moderators in physical activity interventions involving adolescent girls, particularly baseline characteristics that may moderate their responses to physical activity interventions. Awareness of the moderators can be useful for determining the type of intervention that may be successful in subgroups of adolescent girls and for tailoring a physical activity intervention to optimally meet each girl’s needs to achieve maximal effects. Findings show that weight status moderated the intervention effects on cardiorespiratory fitness. Compared to the control condition, the intervention increased overweight and obese, but not healthy weight, girls’ cardiorespiratory fitness. A physical activity intervention can improve overweight and obese girls’ cardiorespiratory fitness, possibly attenuating their cardiovascular risk. Therefore, it is essential to include overweight and obese girls in PA interventions to help them reap this important benefit.

中文翻译：

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青春期女孩体育活动干预的主持人


背景 目的是探讨基线社会人口统计学和身体特征是否会调节干预对干预后中度至剧烈体力活动 (MVPA)、体脂百分比、体重指数 z 得分和心肺健康 (CRF) 的影响。相对于控制条件。方法 对来自 24 所学校（12 所干预学校和 12 所对照学校；N = 1519 名女孩）的分组随机试验的数据进行二次分析。通过调查评估年龄、民族、种族、社会经济地位和青春期阶段。测量身高、体重、MVPA（分钟/小时）、体脂百分比和 CRF。进行了混合效应线性模型。结果 与对照组相比，干预措施增加了超重和肥胖女孩的 CRF（分别为 b = 0.28，p = 0.049；b = 0.31，p < 0.01），但没有增加健康体重女孩的 CRF（b = 0.04，p = 0.706） ）。干预组中青春期前至中期女孩的干预后 MVPA 略低于对照组（3.04 比 3.31，p = 0.055），而青春期后期干预组和对照组女孩的干预后 MVPA 为相似（3.12 与 3.04，p = 0.542）。结论 PA 干预可以改善超重和肥胖女孩的 CRF，可能降低她们的心血管风险。需要采取有效的策略来帮助青春期女孩，尤其是青春期前至中期的女孩，在干预结束后维持她们的 MVPA。确定青春期女孩身体活动干预效果的调节因素非常重要，因为迄今为止这些干预措施在这一人群中的有效性有限。 本文弥补了有关青春期女孩身体活动干预调节因素的显着知识差距，特别是可能调节她们对身体活动干预反应的基线特征。对调节者的认识有助于确定在青春期女孩子群体中可能成功的干预类型，并有助于定制体育活动干预措施，以最佳地满足每个女孩的需求，以实现最大效果。研究结果表明，体重状况调节了对心肺健康的干预效果。与对照条件相比，干预措施增加了超重和肥胖，但没有增加女孩的健康体重和心肺健康。体育活动干预可以改善超重和肥胖女孩的心肺健康，可能降低她们的心血管风险。因此，有必要将超重和肥胖的女孩纳入 PA 干预措施中，以帮助她们获得这一重要的益处。