da Costa Bruno G G, da Silva Kelly S, da Silva Jaqueline A, Minatto Giseli, de Lima Luiz R A, Petroski Edio L
Research Centre in Physical Activity and Health, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil.
Department of Physical Education, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil.
J Sport Health Sci. 2019 Mar;8(2):177-182. doi: 10.1016/j.jshs.2017.05.002. Epub 2017 May 12.
Identifying factors associated with physical activity (PA) is useful in planning interventions and policies. The aim of this study was to identify sociodemographic, biological, and psychosocial factors associated with PA performed in school settings.
Data collected for the present study included gender, age, socioeconomic status, body fat percentage, aerobic fitness, self-efficacy, attitudes, peer and parental support, and perception of school environment. Dependent variables were light-intensity PA (LPA) and moderate-to-vigorous-intensity PA (MVPA) performed during school time, recesses, and physical education (PE) classes. Multiple regression analyses were performed.
Participating adolescents ( = 567, 53% female, 12.9 ± 5.3 years) spent 5% of school time in MVPA and 27% in LPA, 15% of recesses in MVPA and 44% in LPA, and 16% of PE classes in MVPA and 41% in LPA. Boys engaged in more MVPA in all categories. Age was inversely related with MVPA and LPA in all periods, whereas body fat percentage was inversely related with MVPA in school time and PE classes. Attitude was inversely related with MVPA in all periods and with LPA in recesses. Considering PA to be good and enjoyable was positively associated with MVPA in school time.
Adolescents spent little time in PA during school. Future interventions should implement enjoyable activities at school.
识别与身体活动（PA）相关的因素有助于规划干预措施和政策。本研究的目的是确定与在学校环境中进行的身体活动相关的社会人口学、生物学和心理社会因素。
本研究收集的数据包括性别、年龄、社会经济地位、体脂百分比、有氧适能、自我效能感、态度、同伴和父母支持以及对学校环境的认知。因变量是在校期间、课间休息和体育课期间进行的轻度身体活动（LPA）和中度至剧烈强度身体活动（MVPA）。进行了多元回归分析。
参与研究的青少年（n = 567，53%为女性，年龄12.9±5.3岁）在MVPA中花费的在校时间占5%，在LPA中占27%；课间休息时在MVPA中占15%，在LPA中占44%；体育课上在MVPA中占16%，在LPA中占41%。在所有类别中，男孩参与的MVPA更多。在所有时间段，年龄与MVPA和LPA呈负相关，而体脂百分比在在校时间和体育课上与MVPA呈负相关。态度在所有时间段与MVPA呈负相关，在课间休息时与LPA呈负相关。认为身体活动有益且有趣与在校期间的MVPA呈正相关。
青少年在学校期间进行身体活动的时间很少。未来的干预措施应在学校开展有趣的活动。
