There are 516 elementary schools for children aged from 6-12 years located in three
different regions in Hong Kong (Education and Manpower Bureau, 2006). Children of
this age are reported to have sedentary behaviour both at home and in school (Johns
and Ha, 1999). Ethical approval for using human participants was obtained from the
Research Committee of the second author’s university. Invitation letters were sent to 50
randomly selected schools among the regions to obtain voluntary participation in the
study. Each school randomly selected 100 children from four classes to complete the
self-administered questionnaires during the school visit. Principals from ten elementary
schools gave consent to conduct the research in their schools. A researcher conducted