Institute for Sport and Physical Activity Research, University of Bedfordshire, Polhill Avenue, Bedford, Bedfordshire, MK41 9EA, UK.
Eur J Pediatr. 2012 Dec;171(12):1805-13. doi: 10.1007/s00431-012-1827-0. Epub 2012 Sep 15.
The school day offers several different time periods that provide varying opportunities for sedentary time (SED) and engagement in physical activity (PA), yet little is known about the PA and sedentary behaviour patterns of boys and girls during these times. The volume, intensity and temporal distributions of SED and PA undertaken by 135 schoolchildren aged 10-14 years, during different segments of the school day: (a) school transport, (b) morning recess, (c) lunch break, (d) class time and (e) after school, were explored using triaxial accelerometry. PA was categorised into SED, light PA (LPA), moderate PA (MPA) and vigorous PA (VPA). Girls engaged in significantly more SED and LPA than boys during recess and lunch break (p < 0.05), while boys engaged in significantly higher levels of VPA during recess (p < 0.001) and MPA and VPA during lunch break (p < 0.001). PA engagement was similar between sexes during other segments of the day.
PA patterns appear more beneficial for health in boys during less structured school-based time periods and interventions may therefore target opportunities for girls to be physically active during these times to overcome this observed sex deficit.
学校一天提供了几个不同的时间段，为久坐时间（SED）和身体活动（PA）提供了不同的机会，但对于男孩和女孩在这些时间内的 PA 和久坐行为模式知之甚少。使用三轴加速度计探索了 135 名 10-14 岁学童在学校日的不同时间段（a）上学交通、（b）上午课间休息、（c）午餐休息、（d）上课时间和（e）放学后进行的 SED 和 PA 的量、强度和时间分布。PA 分为 SED、低强度 PA（LPA）、中强度 PA（MPA）和高强度 PA（VPA）。女孩在课间休息和午餐休息时的 SED 和 LPA 明显高于男孩（p < 0.05），而男孩在课间休息时的 VPA 和 MPA 和 VPA 明显高于男孩（p < 0.001）。在一天的其他时间段，男孩和女孩的 PA 参与度相似。
在学校时间较少的结构化时期，PA 模式对男孩的健康似乎更有益，因此干预措施可能针对女孩在这些时间内积极活动的机会，以克服观察到的性别差距。
