基于加速度传感器测量技术的中欧学生身体活动初步比较研究——以发达地区部分学生与欧洲学生为比较对象

Preliminary Comparative Research on Monitoring Chinese and European Students' Physical Activity by Accel erometer:Comparing Sectional Students in Developed Areas of China with European Students

目的:运用加速度传感器评价我国发达地区中学生日常身体活动状况,并与欧洲中学生进行对比分析。方法:选取江苏省南通市一所初中和一所高中,在初一、初三和高二年级各选取两个班级学生作为研究对象,共计有效样本286人,佩戴Actigraph GT3X加速度传感器以一周以获得身体活动相关数据,并与欧洲同等测量条件下公开发表数据进行对比分析。结果:我国中学生平均活动强度(欧洲为410.0 counts/min,中国为255.8counts/min),中高强度身体活动时间(欧洲为55 min/天,中国为34 min/天),推荐活动量达标情况(欧洲为41%,中国为14.7%)均远低于欧洲,而静态活动时间和静态活动时间占有效佩戴时间的百分比却高于欧洲(欧洲为9 h,占71%;中国为11.2 h,占76%)。中欧学生的静态活动时间均占有效佩戴时间的绝大部分,并且静态活动时间随着年龄的增长而增多。中国及欧洲男性的平均活动强度、中高强度身体活动时间值均高于女性,静态活动时间则相对少于女性。结论:我国中学生总体身体活动水平明显低于欧洲学生,主要表现为活动强度低、中高强度活动时间少、推荐活动量达标率低,静坐时间长、静坐时间占日常学习生活时间比例高。中国和欧洲学生均以静态生活方式为主,静态活动时间随着年龄增长而增加,中欧男性的身体活动水平均优于女性。

Objective：The study aims to monitor and evaluate Chinese middle school students＇ daily physical activity by objective accelerometer technology,furthermore,to make a comparative analysis with European students in order to investigate the difference between Chinese students and European studentsand provide scientific basis of physical activity improvement project. Methods：Select one junior middle school and one senior high school in Nantong City,Ji-angsu Province,and there are totally 286 students as valid sample from every two classes from junior 1、junior 3 and senior 2. Students should wear ActigraphGT3 X accelerometer for a week（including Saturday and Sunday）. Results：AI（410.0 counts/minute in Europe,255.8 counts/minute in China）,MVPA（55minute/day in Europe,34.1minute/day in China）and compliance rate of physical activity recommendations（41% in Europe,14.7% in China）of Chinese stu-dents are much lower than those of European students,furthermore,sedentary time of Chinese students is higher than that of European students（9 hours/dayin Europe,71% of the registered time;11.2 hours/day in China,76% of the registered time）. Both Chinese and European students spend on their most wak-ing time on sedentary behaviors（71% of the registered time in Europe,76% of the registered time in China）and sedentary time increases with age. Both Chi-nese and European boys＇ AI and MVPA are higher than girls and sedentary time of boys is less than that of girls. Conclusions：Physical activity level of Chi-nese middle school students is much lower that of European student,for example,lower physical activity intensity,lower moderate to vigorous intensity physi-cal activity,lower rate of meeting recommended activity level and more sedentary time. On the other hand,students＇ sedentary lifestyle has become a univer-sal problem not only in European but also in China.