Abstract:  Objective · To describe the current status and explore the associated factors of sedentary behaviors among children and adolescents residing in  Chongqing area.  Methods · By random stratified and cluster sampling, a total of 9 596 students aged from 6 to 18 years old in Chongqing urban districts  together with their parents were enrolled through a questionnaire. Mann-Whitney U test and Kruskal-Wallis H test were used to compare the difference among groups, and the binary Logistic regression model was used to explore the factors that influenced the prevalence of average time of homework>2 h/d 
 and screen time>2 h/d.  Results · The average time of sedentary behaviors in school days was 2.82 h/d, and the rate of sedentary behaviors>2 h/d was  74.1%. The rate of boys (75.3%) was significantly higher than that of girls (72.7%) (χ2=8.333, P=0.000). Logistic regression analysis showed that junior  and senior students were the common risk factors for both homework and screen time>2 h/d; on the contrary, extracurricular sports never being occupied  could be the common protective factors. In addition, being girls (OR=1.187, 95% CI 1.048-1.299) and parents’ sedentary time>2 h/d (OR=1.529, 95% CI 1.303-1.794) could be the risk factors for homework time>2 h/d. Non-only child (OR=1.194, 95% CI 1.066-1.320), no family rules on screen time (OR=1.193, 95% CI 1.062-1.388), and having a TV set at home (OR=1.330, 95% CI 1.147-1.472) could be the risk factors for screen time>2 h/d.  
 Conclusion · The status quo of sedentary behaviors among students in Chongqing area is not quite well. School’s policy on extracurricular sports and  home screen environment may be the mainly modifiable influencing factors. 

Key words: sedentary&ensp, behavior, &ensp, screen&ensp, time, &ensp, children, &ensp, adolescents, &ensp, family&ensp, environment