Correlation Between Physical Activity Level,Sedentary Behavior And Physical Health Of Junior High School Students Research

Object:In this study,the physical activity level and sedentary behavior of junior high school students were investigated,and the effects o f physical activity and sedentary behavior on physical health were discussed in combination with physical test results.Methods:Random selection of students from Affiliated Junior High School of Yangzhou College of Education in the first,second and third grade as the research object.Respectively,physical activity and sedentary behavior questionnaire survey were completed for them.At the same time,according to the "National Standards for Students' Physical Health(Revised in 2014)" issued by the Ministry of Education,students were tested for physical fitness,including measurement of height,weight,vital capacity,forward flexion,50-meter run,standing long jump,1000-meter run(male),800-meter run(female),pull-up(male),1-minute sit-up(female)and other relevant indicators.The correlation between physical activity,sedentary behavior and physical health test results were calculated.Results:(1)There was a significant difference in the one-week learning sedentary time of junior high school students in different grades(P<0.05),which was shown that grade 3 was higher than grade 1.There were significant differences in learning sedentary and recreational sedentary time between male and female students(P<0.05).(2)The high-intensity physical activities times a week of junior high school students was significantly positively correlated with vital capacity(P<0.01),and was significantly positively correlated with boys' 1000-meter run results(P<0.05).The moderate physical activities times a week of junior high school students was significantly positively correlated with girls' 800-meter run performance(P<0.05).There was a significant positive correlation between the exercises times more than 30 minutes a week of junior high school students and vital capacity(P<0.05).(3)The one-week learning sedentary time of junior high school students was significantly negatively correlated with the results of girls' 800-meter run and boys'1000-meter run(P<0.05).There was a significant negative correlation between recreational sedentary time and 50-meter run achievement(P<0.05).The total sedentary time of junior high school students in a week was significantly positively correlated with body weight(P<0.05),an d was significantly negatively correlated with 50-meter run,800-meter run(female)and 1000-meter(male)(P<0.05).The total screen sedentary time of junior high school students in a week was significantly positively correlated with body weight(P<0.05),and was significantly negatively correlated with boys' 1000-meter results(P<0.05).The entertainment screen sedentary time in a week of junior high school students has a significant positive correlation with body weight(P<0.05)and a significant negative correlation with boys' 1000-meter results(P<0.05).Conclusion:(1)There are differences between male and female students in sedentary time per week for junior high school students,and there are differences between grades in learning sedentary time.There is a statistical difference between grades in junior high school students' weekly screen sedentary time,and those of grade 1 and 2 are significantly higher than that of grade 3.(2)Physical activity of junior high school students is significantly positively correlated with vital capacity and the results of girls' 800 m and boys' 1000m.(3)The sedentary behavior of junior high school students is positively correlated with their weight,and negatively correlated with the results of 50 m,800 m for girls and 1000m for boys.Screen sedentary time is positively correlated with body weight and negatively correlated with boys' 1000 m results.