Obesity is a serious problem in our society. An evaluation of obesity development performed in the second half of the previous century already indicated a long-term positive trend in terms of body weight increase in children and the youth, which still persists today. Paediatric obesity arises from a changed lifestyle of children, characterised by an important restriction of their spontaneous physical activity. A lack of physical activity is one of the most important causes of paediatric obesity, which associated with a number of serious disorders. In the current study, the incidence of obesity and overweight as well as the relationship between physical activity and obesity in second stage pupils of elementary schools in northwest Bohemia is presented. The data collection was based on questions from the NAS 2001 questionnaire (nationwide anthropological survey) and BMI-for-age. 2001. NAS 2001 is a questionnaire for children and evaluates areas focused on engagement in physical activities and other daily activities, eating habits, drinking regime and care of the body habitus. Problems with obesity and overweight are present, particularly in boys. Only a third of boys and girls engage in sufficient physical activity. Differences were shown in the study group, where groups with higher BMI values had lower values of physical activity. Subsequently, a relationship was shown between those who use their bicycle as a means of transport and spend their leisure time bicycling at the same time. More than two-thirds of the study subjects reported using a bicycle as a means of transport and using their bicycle in their leisure time as a means of being active; 93% of these subjects had normal body weight. Our results confirm the continued pandemic prevalence of obesity and indicate that appropriate physical activity should be included in the everyday life of children both at school and outside of school.

中文翻译：

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体育活动对西北波西米亚小学二年级学生肥胖的影响

肥胖是我们社会的一个严重问题。上世纪下半叶对肥胖发展的评估已经表明儿童和青少年体重增加的长期积极趋势，这种趋势今天仍然存在。儿童肥胖源于儿童生活方式的改变，其特征是他们的自发性身体活动受到严重限制。缺乏体育锻炼是导致儿童肥胖的最重要原因之一，这与许多严重疾病有关。在目前的研究中，介绍了波西米亚西北部小学二年级学生的肥胖和超重发生率以及体育活动与肥胖之间的关系。数据收集基于来自 NAS 2001 问卷（全国人类学调查）和年龄别体重指数的问题。2001. NAS 2001 是一份针对儿童的调查问卷，评估侧重于参与体育活动和其他日常活动、饮食习惯、饮酒方式和身体习惯护理的领域。存在肥胖和超重问题，尤其是男孩。只有三分之一的男孩和女孩进行了足够的体育活动。研究组显示出差异，其中 BMI 值较高的组的体力活动值较低。随后，在使用自行车作为交通工具并同时将休闲时间骑自行车的人之间显示了一种关系。超过三分之二的研究对象报告使用自行车作为交通工具，并在闲暇时间使用自行车作为一种活跃的方式；这些受试者中 93% 的体重正常。我们的结果证实了肥胖症的持续流行，并表明在学校和校外儿童的日常生活中都应包括适当的体育活动。