Evaluation of in-school physical activity of grade one in senior high school students in Xicheng District

Objective To evaluate in-school physical activity level of high school students in Beijing,in order to provide evidence for school to take strategies to promote physical activity level of students.Methods A total of 208 healthy adolescents (102 boys and 106 girls) were recruited from six high schools in Xicheng District.ActiGraph GT3X+ was used to measure in-school physical activity of subjects.Results During school time,girls spent more time on sedentary behavior and less time on LPA and MVPA than boys(P<0.01).The same situation showed in PE class.In different levels of high school,students of third level high schools spent more time on sedentary behavior and less time on MVPA than students of first and second level high schools(P< 0.01).In PE class,boys spent 13 minutes on sedentary behavior and 15 minutes on MVPA,while girls spent 19 minutes on sedentary behavior and 10 minutes on MVPA.None of the students' MVPA time met physical activity guideline.Conclusion Girls has got a lower level of physical activity than boys.Middle school students spent less time on moderate and highly-extensive sports in PE class.Students in school of type 1 and 2 had a higher level of in-school physical activity than those in school of type 3.