Center for Health Research, Kaiser Permanente Northwest, 3800 N, Interstate Avenue, Portland, OR, 97227, USA.
Int J Behav Nutr Phys Act. 2010 Nov 3;7:79. doi: 10.1186/1479-5868-7-79.
This study aimed to evaluate the associations of selected demographic, individual, social, and environmental factors with moderate-to-vigorous physical activity (MVPA) in a sample of children and adolescents.
MVPA was assessed among youth (n = 294) 10-17-years-old using the ActiGraph accelerometer. Youth completed measures of demographic and individual variables related to physical activity (PA), perceived social support by parents and peers, and perceived neighborhood characteristics. Parents completed the long-form of the International Physical Activity Questionnaire. The Physical Activity and Media Inventory was used to measure the home environment and Geographical Information Systems software was used to measure the physical neighborhood environment. Bivariate correlations and hierarchical multiple regression were conducted stratified by gender.
Boys participated in significantly more MVPA than girls. In hierarchical analyses, peer support, home PA equipment, and temperature were significantly associated with MVPA among boys whereas distance to the school they attended was associated with MVPA among girls. The final models accounted for 25% and 15% of the variance in MVPA among boys and girls, respectively.
Important differences exist among the individual, social, and environmental factors related to MVPA between boys and girls. Boys' levels of activity appear to be influenced by factors closely linked to unstructured and social types of activities whereas girls' activities relate to internal and external barriers as well as their proximity to their schools. The prospective contribution of these important individual, social, and environmental factors to changes in MVPA among children and adolescents remains to be determined.
本研究旨在评估一系列选定的人口统计学、个体、社会和环境因素与儿童和青少年中中高强度体力活动（MVPA）之间的关联。
使用加速度计对 294 名 10-17 岁的青少年进行 MVPA 评估。青少年完成了与 PA 相关的人口统计学和个体变量、来自父母和同伴的感知社会支持以及感知邻里特征的测量。家长填写了国际体力活动问卷的长式。使用体育活动和媒体清单来测量家庭环境，使用地理信息系统软件来测量物理邻里环境。按性别分层进行了双变量相关性和分层多元回归分析。
男孩的 MVPA 参与量明显多于女孩。在分层分析中，同伴支持、家庭 PA 设备和温度与男孩的 MVPA 显著相关，而与女孩的 MVPA 相关的是到他们就读学校的距离。最终模型分别解释了男孩和女孩 MVPA 变异的 25%和 15%。
男孩和女孩之间与 MVPA 相关的个体、社会和环境因素存在重要差异。男孩的活动水平似乎受到与非结构化和社交类型活动密切相关的因素的影响，而女孩的活动则与内在和外在障碍以及她们与学校的距离有关。这些重要的个体、社会和环境因素对儿童和青少年 MVPA 变化的预期贡献仍有待确定。
