Abstract Globally physical inactivity is one of the significant public health issues. Low and/or insufficient participation in physical activity (PA) of adolescents during leisure time and increase sedentary behavior among them is worrisome. This paper investigates (i) associations between barriers (i.e., UGS-based and internal/social) and adolescents' PA in urban green spaces (UGSs), (ii) mediating effects of Body Mass Index (BMI) and screen time on associations between adolescents` PA and UGSs distance, and (iii) sex (boys and girls) and age (13–15, 16–17, and 18–19 years old) differences among these relationships. Data (n = 384) were collected though surveys in 2018 in Aydin, Turkey. Multivariate regression, mediation, and stratified analyses were conducted to examine associations controlling for confounding factors. Findings revealed that distance to UGSs, lack of greenness, and parents` restriction due to safety concerns were negatively associated with frequency of PA, whereas unattractive UGSs, playgrounds design for younger children, and preference and popularity of online communication with peers were negatively correlated with duration of PA. The relationship between UGSs distance and adolescents` frequency of PA was mediated by screen time. Stratified analyses revealed that lack of greenness was found to be the most significant barrier for all groups. While boys were concerned about characteristic features and design of UGSs, girls were concerned about accessibility and safety. Younger adolescents were concerned about safety related issues while older adolescents were concerned about quality, time pressure, and peers related issues. Findings of this study suggest that if barriers are properly eliminated, it is likely that adolescents will be more physically active.

中文翻译：

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调查阻止青少年在城市绿地进行体育活动的障碍

摘要 全球缺乏身体活动是重大的公共卫生问题之一。青少年在闲暇时间参与体育活动 (PA) 低和/或不足，以及增加他们久坐不动的行为令人担忧。本文调查了 (i) 障碍（即基于 UGS 和内部/社会）与城市绿地 (UGS) 中青少年 PA 之间的关联，(ii) 体重指数 (BMI) 和屏幕时间对两者之间关联的中介作用青少年的 PA 和 UGS 距离，以及 (iii) 这些关系之间的性别（男孩和女孩）和年龄（13-15、16-17 和 18-19 岁）差异。数据（n = 384）是通过 2018 年在土耳其艾丁的调查收集的。进行多变量回归、中介和分层分析以检查控制混杂因素的关联。调查结果显示，到 UGS 的距离、缺乏绿化以及父母出于安全考虑而受到的限制与 PA 频率呈负相关，而缺乏吸引力的 UGS、针对年幼儿童的游乐场设计以及与同龄人在线交流的偏好和受欢迎程度与 PA 频率呈负相关。 PA 的持续时间。UGSs 距离与青少年 PA 频率之间的关系由屏幕时间介导。分层分析显示，缺乏绿色是所有群体最重要的障碍。男孩关心 UGS 的特性和设计，而女孩则关心可达性和安全性。年轻的青少年关注安全相关问题，而年长的青少年关注质量、时间压力和同龄人相关的问题。