J Phys Act Health. 2019 Sep 1;16(9):765-771. doi: 10.1123/jpah.2018-0622. Epub 2019 Jul 17.
This study examined the distribution of objectively measured physical activity (PA) and sedentary time of fifth-grade students during school, leisure time, and physical education (PE) classes. Demographic, anthropometric, and PA data were collected from 17 representative Finnish schools.
To estimate the PA and sedentary time, participants (N = 592) wore wGT3X-BT ActiGraphs for 7 consecutive days. Comparisons were made between genders and different BMI groups.
From the study sample, 43.7% met the moderate to vigorous PA (MVPA) guidelines. Participants spent 62.2% of the day sedentary and 8.2% in moderate and vigorous activities. Boys performed more MVPA than girls, and girls were more sedentary during school days. Boys had more MVPA than girls in leisure time, but there were no differences in sedentary time. However, an examination of PA assessed during PE classes revealed no differences between boys and girls. Normal-weight boys engaged in more MVPA than overweight and obese boys. No differences were found for girls.
The PE levels differ between different BMI groups in leisure time and during school but not during PE lessons. PA for overweight children should be targeted and compulsory PE time should be increased to achieve the PA guidelines.
本研究旨在探讨五年级学生在学校、闲暇时间和体育课期间的身体活动（PA）和久坐时间的分布情况。本研究从 17 所具有代表性的芬兰学校中收集了人口统计学、人体测量学和 PA 数据。
为了估计 PA 和久坐时间，参与者（N=592）佩戴了 wGT3X-BT ActiGraphs 连续 7 天。对不同性别和不同 BMI 组之间进行了比较。
从研究样本中，有 43.7%的人符合中高强度 PA（MVPA）指南。参与者每天有 62.2%的时间处于久坐状态，8.2%的时间进行中高强度活动。男孩的 MVPA 比女孩多，而女孩在上学日更久坐。男孩在闲暇时间的 MVPA 比女孩多，但久坐时间没有差异。然而，对体育课期间评估的 PA 进行检查，发现男孩和女孩之间没有差异。正常体重的男孩比超重和肥胖的男孩进行更多的 MVPA。女孩则没有差异。
不同 BMI 组在闲暇时间和上学期间的体育课水平存在差异，但在体育课期间没有差异。应针对超重儿童进行 PA 干预，并增加强制性体育课时间，以达到 PA 指南的要求。
