Research Center in Kinanthropometry and Human Performance, Federal University of Santa Catarina, Florianopolis, Brazil.
Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.
PLoS One. 2019 Mar 13;14(3):e0213785. doi: 10.1371/journal.pone.0213785. eCollection 2019.
To examine the association between participation frequency per week in physical education (PE) classes and physical activity (PA) and sitting time levels in adolescents according to the economic development level of the region of residence.
A cross-sectional study with a sample representative of Brazil was carried out with 12,220 students aged 11-19 years. Participation frequency per week in PE classes, moderate-to-vigorous PA (MVPA), PA during PE classes, active commuting, PA outside of school hours, total accumulated PA, time sitting in front of the TV and total sitting time were assessed by using a self-administered questionnaire.
Adolescents who reported having PE classes were more likely to meet MVPA recommendations (1-2 PE class/week-OR: 1.3, 95%CI: 1.1-1.5; ≥3 PE class/week-OR: 2.0, 95%CI: 1.7-2.5), spent more time in PA outside of school hours (1-2 PE class/week-OR: 1.6, 95%CI: 1.4-1.9; ≥3 PE class/week-OR: 2.0, 95%CI: 1.5-2.6), and accumulated more PA (1-2 PE class/week-OR: 1.9, 95%CI: 1.6-2.2; ≥3 PE class/week-OR: 6.0, 95%CI: 4.0-8.9) than students who reported not taking PE classes. Boys from regions with higher Human Development Index (HDI) who took ≥3 PE classes/week were more likely to have higher levels of active commuting (OR: 1.4, 95%CI: 1.1-1.9) and less likely of getting in front of TV (OR: 0.7, 95%CI: 0.5-0.9). Adolescents from regions with higher HDI were more likely to have more time spent in PA during PE classes (Male-OR: 2.7, 95%CI: 2.4-3.1; Female-OR = 3.2, 95%CI: 2.8-3.7).
Having PE classes is associated with a higher level of PA in both sexes and in both regions and lower level of sitting time in boys from regions with higher HDI.
本研究旨在根据居住地区的经济发展水平，调查每周参加体育课的频率与青少年的身体活动（PA）和久坐时间水平之间的关系。
本横断面研究采用巴西代表性样本，共纳入 12220 名 11-19 岁青少年。通过自填问卷评估每周体育课参与频率、中高强度身体活动（MVPA）、体育课中的 PA、积极通勤、课外 PA、累计 PA、看电视时间和总久坐时间。
报告上体育课的青少年更有可能达到 MVPA 推荐量（1-2 节体育课/周-OR：1.3，95%CI：1.1-1.5；≥3 节体育课/周-OR：2.0，95%CI：1.7-2.5），课外 PA 时间更多（1-2 节体育课/周-OR：1.6，95%CI：1.4-1.9；≥3 节体育课/周-OR：2.0，95%CI：1.5-2.6），累计 PA 更多（1-2 节体育课/周-OR：1.9，95%CI：1.6-2.2；≥3 节体育课/周-OR：6.0，95%CI：4.0-8.9），比不上体育课的学生多。来自人类发展指数（HDI）较高地区且每周上≥3 节体育课的男孩更有可能有更高水平的积极通勤（OR：1.4，95%CI：1.1-1.9），且更少坐在电视机前（OR：0.7，95%CI：0.5-0.9）。来自 HDI 较高地区的青少年在体育课上的 PA 时间更长（男生-OR：2.7，95%CI：2.4-3.1；女生-OR=3.2，95%CI：2.8-3.7）。
上体育课与两性和两个地区的 PA 水平升高有关，与 HDI 较高地区男孩的久坐时间减少有关。
