Canadian Fitness and Lifestyle Research Institute, 201-185 Somerset Street W., Ottawa, Ontario, Canada.
Med Sci Sports Exerc. 2010 Sep;42(9):1639-43. doi: 10.1249/MSS.0b013e3181d58a92.
Objective measurement with body worn instrumentation is a preferred and increasingly common way to gather information about young people's physical activity. Measured samples have been typically small and recruited through schools. The purpose of this article was to present the descriptive epidemiology of children and youth pedometer-determined physical activity on the basis of a large national sample.
Children and youth (19,789) were recruited through random digit dialing. Participants were asked to wear the pedometer for seven consecutive days and to log daily steps. Of the 58% of participants who returned pedometer data, 95% wore the pedometer for at least 5 d. Daily step counts below 1000 or above 30,000 steps were truncated accordingly, and all values were included in the descriptive analysis.
Boys and girls aged 5-19 yr took 12,259 and 10,906 steps per day, respectively. Daily steps were higher among boys than girls and declined by age group in a pattern consistent with that predicted by other smaller samples internationally. Weekday steps per day were generally higher than weekend day steps per day and varied by season.
This study demonstrates the viability of using relatively inexpensive pedometers and methods for the surveillance of young people's physical activity. The resulting descriptive data provide key information regarding the population distribution of pedometer-determined physical activity that may be useful for identifying target groups for population strategies and other interventions.
使用穿戴式仪器进行客观测量是收集年轻人身体活动信息的首选方法，也是一种越来越常见的方法。以往的测量样本通常较小，并且是通过学校招募的。本文的目的是基于一个大型全国样本，展示儿童和青少年计步器测量的身体活动的描述性流行病学。
通过随机数字拨号招募儿童和青少年（19789 人）。要求参与者连续 7 天佩戴计步器并记录每天的步数。在返回计步器数据的 58%的参与者中，有 95%的人佩戴计步器至少 5 天。每天的步数低于 1000 步或高于 30000 步的记录将被截断，所有数值都包含在描述性分析中。
5-19 岁的男孩和女孩每天分别走 12259 步和 10906 步。男孩的日步数高于女孩，且随着年龄组的增加而逐渐减少，这与国际上其他较小样本的预测模式一致。工作日的每日步数通常高于周末日的每日步数，且随季节变化而变化。
本研究证明了使用相对廉价的计步器和方法进行年轻人身体活动监测的可行性。由此产生的描述性数据提供了有关计步器测量的身体活动人群分布的关键信息，这对于确定人群策略和其他干预措施的目标群体可能是有用的。
