Abstract：
This article aims to analyse the relationship between physical activity (PA) environment at schools, sex, age, and obesity in children, using a network approach. This is a cross-sectional study, with 1,200 children (8.1±1.0 years old) from eight public schools in the same municipality. Weight and height measurements were assessed to calculate the Body Mass Index (BMI) and classified as healthier weight or overweight. To assess the PA environment at school, a interview with the school´s manager was conducted. The association between the PA environment at school and obesity was tested using a Network Analysis performed on the Jasp software. Positive associations between BMI and Physical Education classes (0.847), physical education teacher (0.349), break duration (0.564), and indoor sports court (0.662) were observed. Negative associations were seen with sex (-0.212) age (-0.387), extracurricular PA (-0.492), and playground (-0.557). Additionally, the centrality indicators highlighted extracurricular PA (1.789) as the variables with the highest betweenness values, and BMI with the highest closeness (2.239) and strength (1.230) values. Extracurricular PA and the presence of playgrounds in school´s environment are associated with healthier weight in low-income children.
摘要：
本文旨在分析学校体育活动(PA)环境之间的关系，性别,年龄,和儿童肥胖，使用网络方法。这是一项横断面研究,来自同一城市的八所公立学校的1200名儿童（8.1±1.0岁）。评估体重和身高测量以计算体重指数（BMI），并将其分类为更健康的体重或超重。为了评估学校的PA环境，采访了学校的经理。使用在Jasp软件上进行的网络分析测试了学校PA环境与肥胖之间的关联。BMI与体育课之间的正相关（0.847），体育教师（0.349），中断持续时间（0.564），和室内运动场(0.662)。与性别（-0.212）年龄（-0.387）呈负相关，课外PA（-0.492），和操场（-0.557）。此外,中心性指标强调课外PA(1.789)是中间值最高的变量，和BMI具有最高的紧密度（2.239）和强度（1.230）值。课外PA和学校环境中游乐场的存在与低收入儿童更健康的体重有关。
