摘要：The purposes of this study were to compare the objectively measured physical activity levels across physical education, school playtime and extra-curricular sport in secondary school students, as well as to examine the influence of gender, age, and body weight status on adolescents’ objective physical activity levels in these contexts. A hundred and two secondary school students (age 12.53±1.56 years) participated in the present study. Students’ objective physical activity levels were estimated by the multi-sensor device SenseWear Pro2 Armband during a physical education, school playtime and extra-curricular sport session. The result of the one-way multivariate analysis of covariance indicated statistically significant higher values of steps/ min, average metabolic equivalent of task, and time spent in moderate-to-vigorous physical activity in extracurricular sport than in physical education and school playtime (p influence was found (p>.05). This preliminary evidence could inform and guide future policy regarding the promotion of physical activity among adolescents in these important school-based contexts. Since physical activity engagement in compulsory physical activity contexts, such as physical education lessons, is clearly insufficient, parents, teachers and institutions should encourage students to achieve health-related physical activity levels during their free time.
关键词：physical education; school playtime; extra; curricular sport; SenseWear Pro2 Armband; secondary school students; adolescents
