Objectives Asthma and obesity disproportionately affect urban minority children. Avoidance of physical activity contributes to obesity, and urban children with asthma are at risk for lower levels of physical activity. We examined associations between lung function and moderate to vigorous physical activity (MVPA) and moderators of this association in a diverse sample of children with asthma. Methods Urban children (N = 142) ages 7–9 with persistent asthma and their caregivers completed a study of asthma and physical activity. Longitudinal mixed effects models examining daily-level asthma and physical activity evaluated the association between asthma and MVPA, and the moderating effect of weight, and cultural/contextual factors on this association. Results Average daily MVPA was below recommended guidelines. Differences in MVPA were found by racial/ethnic group (p = .04) and weight (p = .001). Poorer asthma status was associated with lower MVPA in Latino and Black participants (p’s < .05), and in normal weight youth (p = .01). Body mass index (BMI) moderated the association between asthma and MVPA. Those with lower BMI had more optimal asthma status and higher MVPA levels, whereas associations attenuated for participants with higher BMI (p = .04). Caregivers’ perceptions of neighborhood safety and fear of asthma were marginally associated with children’s symptoms and MVPA: as perceptions of safety decreased and fear increased, associations between asthma and MVPA weakened (p’s = .09 and .07, respectively). Conclusions Suboptimal asthma status is associated with less MVPA in urban children. Weight status and cultural/contextual factors play a role in the association and are worthy targets for future research and intervention.

中文翻译：

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城市儿童的哮喘和身体活动

目标 哮喘和肥胖对城市少数民族儿童的影响尤为严重。避免体力活动会导致肥胖，患有哮喘的城市儿童面临体力活动水平较低的风险。我们在不同的哮喘儿童样本中检查了肺功能与中度至剧烈体力活动 (MVPA) 之间的关联以及这种关联的调节因素。方法 7-9 岁患有持续性哮喘的城市儿童 (N = 142) 及其照顾者完成了一项关于哮喘和身体活动的研究。检查日常哮喘和身体活动的纵向混合效应模型评估了哮喘和 MVPA 之间的关联，以及体重和文化/背景因素对这种关联的调节作用。结果 平均每日 MVPA 低于推荐的指南。MVPA 的差异由种族/族裔组 (p = .04) 和体重 (p = .001) 发现。较差的哮喘状态与拉丁裔和黑人参与者 (p's < .05) 以及体重正常的青年 (p = .01) 较低的 MVPA 相关。体重指数（BMI）调节哮喘和MVPA之间的关联。BMI 较低的参与者哮喘状态更佳，MVPA 水平较高，而 BMI 较高的参与者的相关性减弱 (p = .04)。看护者对邻里安全的看法和对哮喘的恐惧与儿童的症状和 MVPA 略有相关：随着对安全的看法下降和恐惧增加，哮喘和 MVPA 之间的关联减弱（分别为 p = 0.09 和 0.07）。结论 哮喘状态欠佳与城市儿童 MVPA 较少相关。