Svozil Zbyněk, Frömel Karel, Chmelík František, Jakubec Lukáš, Groffik Dorota, Šafář Michal
Department of Social Sciences in Kinanthropology, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic.
Institute of Active Lifestyle, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic.
Cent Eur J Public Health. 2015 Nov;23 Suppl:S44-9. doi: 10.21101/cejph.a4186.
Sedentary behaviour and increasing mental load in adolescents is one of the major health problems of the contemporary youth. The aim of the study is to analyze the associations between mental load and physical activity (PA) in adolescents in school-day segments.
381 adolescents (120 boys, 261 girls) took part in the research which was conducted in 19 secondary schools in the Czech Republic. Participants throughout the whole day (1-3 days) wore an ActiTrainer accelerometer that monitors PA and heart rate (HR). The reports covered 727 school days. The participants were divided into two groups with lower and higher mental load.
Boys and girls with higher mental load in lessons do not compensate this load in neither volume nor intensity of PA during recess in greater amount than those who had lower mental load. In the individual school-day segments (apart from the time before school) no significant differences between the groups were found.
When creating a habit of immediate compensation for mental load in lessons by PA, it is necessary to pay attention to boys and girls with higher mental load in lessons. The adoption of the habit should be supported by adequate physical literacy of both students and teachers and by changes in the school programme.
青少年久坐行为和精神负担加重是当代青年主要的健康问题之一。本研究的目的是分析青少年在上学时间段内精神负担与身体活动（PA）之间的关联。
381名青少年（120名男孩，261名女孩）参与了在捷克共和国19所中学开展的研究。参与者在一整天（1 - 3天）内佩戴ActiTrainer加速度计，该设备可监测身体活动和心率（HR）。报告涵盖727个上学日。参与者被分为精神负担较低和较高的两组。
课堂上精神负担较高的男孩和女孩，在课间休息时身体活动的量和强度都不会比精神负担较低的男孩和女孩更多地来补偿这种负担。在各个上学时间段（除上学前的时间），两组之间未发现显著差异。
在培养通过身体活动即时补偿课堂上精神负担这一习惯时，有必要关注课堂上精神负担较高的男孩和女孩。学生和教师具备足够的身体素养以及学校课程的改变应有助于支持这一习惯的养成。
