Mota Jorge, Santos Paula, Guerra Sandra, Ribeiro José C, Duarte José A
Research Center of Physical Activity, Health and Leisure, Faculty of Sport Sciences, University of Porto, Portugal.
Am J Hum Biol. 2003 Jul-Aug;15(4):547-53. doi: 10.1002/ajhb.10163.
The purpose of this study was to examine the weekday patterns of moderate-to-vigorous physical activity (MVPA) in school children and adolescents and determine if there are periods of the day that are representative of their typical MVPA. The sample comprised 84 subjects (boys, n = 30; girls, n = 54), age 8-15 years old. Daily totals for the physical activity variables were calculated by summing the values from 13 hr of physical activity (PA) measurements (9:00-22:00), with 60-min time blocks comprising each day. The MVPA data values were categorized in four daily periods: morning (9:00-11:59), noon (12:00-14:59), late afternoon (15:00-17.59), and evening (18:00-21.59). Our data show that boys participated significantly more in MVPA than girls. Despite no clear patterns or differences among sex being found, girls showed higher percent of time engaged in MVPA during the morning and early afternoon periods (sum of two periods 51.0%), while boys' percent of time engaged in MVPA is higher at late afternoon and evening periods (sum of two periods 53.8%). The principal components analyses showed four distinct components that accounted for 67% of the variance, as follows: school hours (component 1); lunchtime and outside-school activities (component 2); morning time before school period (component 4); and period before bedtime (component 3) appear as distinct periods of the day. In conclusion, the present study shows that boys engaged more in MVPA than girls. Girls tend to be more active during school periods, while boys are more active after school.
本研究的目的是调查学龄儿童和青少年在工作日进行中度至剧烈身体活动（MVPA）的模式，并确定一天中是否存在代表其典型MVPA的时间段。样本包括84名受试者（男孩30名，女孩54名），年龄在8至15岁之间。通过将13小时身体活动（PA）测量值（9:00至22:00）相加来计算身体活动变量的每日总量，每天由60分钟的时间段组成。MVPA数据值被分为四个每日时间段：上午（9:00至11:59）、中午（12:00至14:59）、下午晚些时候（15:00至17:59）和晚上（18:00至21:59）。我们的数据显示，男孩参与MVPA的程度明显高于女孩。尽管未发现性别之间有明确的模式或差异，但女孩在上午和下午早些时候参与MVPA的时间百分比更高（两个时间段总和为51.0%），而男孩在下午晚些时候和晚上参与MVPA的时间百分比更高（两个时间段总和为53.8%）。主成分分析显示了四个不同的成分，占方差的67%，如下：上课时间（成分1）；午餐时间和校外活动（成分2）；上学前的早晨时间（成分4）；以及就寝前的时间段（成分3）呈现为一天中不同的时间段。总之，本研究表明男孩比女孩更多地参与MVPA。女孩在上学期间往往更活跃，而男孩在放学后更活跃。
