Objective To improve physical activity by assessing pedometer-based physical activity during specific intervals over a week, among junior high school students, and to provide a reference for improving the level of students’ physical activity.
Methods Students ( n = 675) of grades 6–8 from six public junior high schools in Shanghai were recruited and instructed to wear a pedometer for a week, step counts and contents were recorded over a specific period. This period mainly included steps taken on the way to and from school, at school, at home in the evening on weekdays, and in the morning, afternoon, and evening on weekends.
Results The daily step counts recorded were 8 332 steps, with those on weekdays showing significantly higher values than step counts on weekends (9 065 steps vs. 6 392 steps) ( t = 22.9, P<0.01). Proportionately, the physical activity level at school contributed more to daily step counts (61.3%), followed by those on the commute to and from school (25.5%). Boys were more active than girls. For all intervals on weekdays, the step counts of students in rural districts, with overweight or obese, in grades 6 and 7, were higher than those in urban districts, with normal status, in grade 8 respectively ( P<0.05). Low-activity students with physical education were more active than one without physical education (t boy = 1.99, t girl] =2.45, P<0.05).
Conclusion These findings facilitate the implementation of effective, feasible interventions to enhance physical activity over a series of intervals during the day.
【摘要】 目的 利用运动手环评估初中生 1 周每日不同时段步行数及相关因素, 为提髙学生身体活动水平提供参 考。 方法 在上海市金山区招募 6 所公办中学, 抽取六至八年级学生 (675名)按要求佩戴手环 1 周, 并记录特定时段步行 数及活动内容, 上学日分路途 (上学和放学)、在校 (上午和下午)、居家; 周末分上午、下午、晚上。 结果 每日步数为 8 332 步, 上学日每日步行数髙于周末 (9 065, 6 392 步) ( t = 22.9, P <0.01)。 在校期间步行数最多, 占 61.3%; 其次是路途 (25.5%)。 上学日同时段男生步行数均髙于女生, 乡村学生均髙于城镇, 超重与肥胖学生均髙于正常学生 ( P值均<0.05); 低活跃组学生在有体育课安排下步行数髙于无体育课安排 (t 男 = 1.99, t 女 = 2.45, P 值均<0.05)。 结论 该研究为在不同时 段内增强学生身体活动水平提供依据, 有助于实施有效可行的干预措施。