【摘要】 [目的]分析静态行为与屏前行为、轻度体力活动、中重度体力活动,以及与学生营养状况的关系。[方法]2011年采用多阶段抽样法抽取上海市3个区3所中学共10个班级的学生自行填写的调查表,对学生上学日和周末的整日各个活动进行分类汇总和分析。对数据进行描述性分析、相关性分析和Kruskal-Wallis检验。[结果]周末调查对象的静态行为是每天389.19 min,屏前行为的时间是每天122.93 min,均超过上学日的3倍。青少年的静态行为时间与中重度体力活动无关,与轻度体力活动有关。肥胖组、超重组、体重正常组、较低体重组和营养不良组周末的屏前时间均值的差异有统计学意义。[结论]青少年课余时间的体力活动不足,屏前行为可能与青少年不良的营养状况有关。更多还原

【Abstract】 [Objective] To investigate and analyse the related factors of static behavior among adolescents,such as screen time,mild physical activity,moderate and vigorous physical activity,and nutritional status. [Methods] In 2011,multistage sampling was done from 10 classes of three middle schools in three districts in Shanghai; the students filled the questionnaire on their own which recorded all of the activities of one school day and one weekend day. The data was analyzed by general describing analysis, correlation analysis,and Kruskal-Wallis test. [Results] The static time in weekend was 389. 19 minutes per day,the screen time was 122. 93 minutes per day,and both were over three times those on one school day. The static time was not related to moderate and vigorous physical activity,but was related to mild physical activity. The difference in mean time before the screen at weekend was statistically significant between obesity group,overweight group,normal group,low weight group and malnutrition group. [Conclusion] Adolescents lacked adequate physical activities in their spare time,and behavior before the screen might be related to their poor nutrition status.更多还原