Level of physical activity in leisure time among junior high school students in Jinshang District / 预防医学

ABSTRACT

Objective@#To explore the determinants of physical activity during leisure time among junior high school students in Jinshan District of Shanghai based on socio-ecological model, so as to provide basis for health promotion in adolescents. @*Methods@#Six public junior high schools were randomly selected from Jinshan District and then a class was selected from every grade. The physical activity of the students in the spare time of one week was monitored. The determinants of physical activity were investigated through a self-designed questionnaire based on socio-ecological model,and were analyzed by optimal scaling regression. @* Results@#A total of 645 questionnaires were sent out, 622（96.43%）of which were valid. The median time spent on active physical activity after school on weekdays and at weekends was 29.00 min and 45.00 min, respectively. The scores of individual, interpersonal and environmental factors were 10.53 ± 2.04, 5.10 ± 1.51 and 8.31 ± 1.85,respectively. The results of the optimal scaling regression analysis showed that residence（β=-0.117, -0.159）,individual factors（β=0.244,0.277）, interpersonal factors（β=0.113, 0.085）and environmental factors（β=-0.140, -0.120) were the influencing factors for the physical activity in extracurricular time on weekdays and at weekends. On weekdays, the influence of individual factors was the largest （62.2%）,followed by interpersonal factors（20.8%）and residence（16.8%）. At weekends, the influence of individual factors was the largest（65.4%）, followed by residence（23.6%）and interpersonal factors（10.5%）.@*Conclusions@#The physical activity level during leisure time among junior high school students in Jinshan District is most affected by individual factors, followed by interpersonal factors and residence. The time spent on physical activity at weekends is insufficient, and the influence of residence is behind individual factors.