Abstract: Objective To explore current status of physical exercise among high school students in Shanghai,and its association with academic performance.Methods Data came from 2015 Youth Risk Behaviors Surveillance in Shanghai.A total of 28 ordinary high schools and 28 secondary vocational technical school students were selected through stratified random sampling method.Questionnaire of Adolescent Health Related Behaviors in Shanghai(For high school students) was implemented.About 13 151 out of 13 200 questionnaires were eligible.The response rate was 99.63%.T test,correlation analysis,chi-square test,variance analysis and ordinal logit analysis were included in the analysis.Results About 8.6% of all the students reported over 30 min moderate-intensity physical activity(MVPA) every day during the past week,and 15.8% reported over 60min physical activity every day during the past week.In the past week,the average days for MVPA was 2.65 among ordinary high school students,significantly higher than that of secondary vocational technical school students(2.26) (t =10.347,P<0.01).Physical activity duration and intensity differed significantly in gender and grade(P<0.01).Students lack physical activity severely showed poor academic performance(P <0.01).Girl,studying in secondary vocational technical schools and senior grade was risk factor for severe physical inactivity(P<0.01).Conclusion High school students in Shanghai are insufficient in physical active.The findings suggest physical inactivity correlates poor academic performance.