Analysis on Average Time of Physical Activity in a School Day Among Chinese Students

Objective To study the physical activity of Chinese students in a school day,and to provide baseline data for the intervention measures.Methods The data of 2002 China Nutrition and Health Survey was used.The information on physical activity in a week,including class, homework,transportation,outdoor activity,exercise,housework,sedentary activity and sleep was described,which were from 11 438 students(6 067 boys and 5 371 girls).Results The time use on study was 5.97 h,7.22 h and 7.63 h;on physical activity (including outdoor activity,exercise and housework) was 2.07 h,(1.93) h and 1.78 h;on sedentary activity was 2.08 h,2.09 h,2.54 h and on sleeping was 9.08 h, 8.53 h and 8.15 h respectively.Conclusion Differences in physical activities among different sexes,ages and areas should be considered when intervention measure is developed.