Tudor-Locke Catrine, Lee Sarah M, Morgan Charles F, Beighle Aaron, Pangrazi Robert P
Walking Research Laboratory, Department of Exercise and Wellness, Arizona State University, Mesa, AZ 85212-0180, USA.
Med Sci Sports Exerc. 2006 Oct;38(10):1732-8. doi: 10.1249/01.mss.0000230212.55119.98.
To describe the sex-specific patterns of school children's daily pedometer-determined physical (PA) during physical education (PE), recess and lunchtime, and before and after school.
Eighty-one sixth-grade students (28 boys, age = 11.9 +/- 0.4 yr, BMI = 18.8 +/- 4.1 kg x m(-2); 53 girls, 11.8 +/- 0.5 yr, BMI = 20.2 +/- 4.6 kg x m(-2)) wore pedometers for four school days and were prompted to record steps accumulated at arrival and departure from school and during pre- and postrecess, lunchtime, and PE class.
Boys took significantly (P < 0.001) more steps per day than girls: 16,421 +/- 5,444 vs 12,332 +/- 3,056 steps per day, and more steps during release time (e.g., before-school Delta = 1289 steps, recess Delta = 479 steps, lunchtime Delta = 608 steps, and after-school Delta = 1872 steps) but the same number of steps during structured PE classes (1429 +/- 567 vs 1410 +/- 445 steps; P = 0.87). Lunchtime PA represented the most important source of daily PA (15-16%) obtained during school hours for both boys and girls, whereas recess accounted for 8-9% and PE class accounted for 8-11% of total steps per day. Regardless, almost half of daily steps taken are attributable to after-school activities.
These data provide greater understanding of sex-specific PA patterns and the relative contribution of distinct segments of the school day to school children's total PA.
描述学龄儿童在体育课、课间休息、午餐时间以及上学前后通过计步器测定的日常身体活动（PA）的性别差异模式。
81名六年级学生（28名男生，年龄=11.9±0.4岁，BMI=18.8±4.1kg·m⁻²；53名女生，11.8±0.5岁，BMI=20.2±4.6kg·m⁻²）佩戴计步器四天，并被要求记录上学和放学时以及课间休息前、午餐时间、体育课前后积累的步数。
男生每天的步数显著（P<0.001）多于女生：分别为16421±5444步/天和12332±3056步/天，在自由活动时间（如上学前差值=1289步，课间休息差值=479步，午餐时间差值=608步，放学后差值=1872步）步数更多，但在有组织的体育课上步数相同（1429±567步对1410±445步；P=0.87）。午餐时间的身体活动是男女生在校期间每日身体活动的最重要来源（15-16%），而课间休息占每日总步数的8-9%，体育课占8-11%。无论如何，几乎一半的每日步数归因于课后活动。
这些数据有助于更深入了解特定性别的身体活动模式以及学校一天中不同时间段对学龄儿童总体身体活动的相对贡献。
