The Follow-up Study Of The Physical Activity&Physical Fitness For A Middle School Students In Nantong

Objective:To obtain the baseline objective data of students' physical activity and physical condition, and to analysis the relationship between physical activity and health-related physical fitness. With a longitudinal study by GT3 X acceleration sensor for two consecutive years on the characteristics of middle school students' daily physical activity and the condition of student's physique by fitness testing.Methods: Select the 158 students which enrollment in 2013 from 3 class of Jiangsu Province, city of Nantong, JinJiao junior middle school. Taking a class as a unit, registration basic information, measuring height, weight, vital capacity(VC), body anteflexion in sitting position, standing long jump, 1000/800 meters. Then asked the students to wear acceleration sensor for a week continually, including five school days and two weekend days. Take it back after a week, using the analysis software Actilife6 export. Repeated experiment on the same group of students in 2014. Then analyze the physical activity and physical condition, and the connection between them in two consecutive years with different gender and different body forms of physical activity status. Finally, analyze the statistics by SAS JMP10.Results:1.From the gender perspective, the girls ' AI and mild physical activity, MVPA was lower than boys' significantly in two consecutive years(P< 0.0001),the time of daily average sedentary behavior was more than boys'.2.From the years perspective, the time of daily average sedentary behavior, AI, and MVPA of second year are all less than the first year. But the average daily light physical activity is longer than the first year obviously.3.The recommended of physical activity, the student compliance rates are all very low for two consecutive years, the standard rate of boys were 5% and 8.97% for two consecutive years, girls were not up to standard.4.From the change situation of BMI, whatever BMI level increased or decreased, static behavior of the average daily were significantly decreased, the time of daily average sedentary behavior were all decreased and the average daily light physical activity were all increased,the average daily MVPA had no obvious change.5.According to the results of physical testing, only vital capacity and 1000/800 m has obvious differences during two consecutive years. Whatever VC and 1000/800 m performance becomes better or worse, the time of daily average sedentary behavior and AI were all decreased significantly, the average daily light physical activity were all increased and the average daily MVPA had no obvious change of 1000/800 m,but the students become worse of vital capacity was significantly shorter of the time average daily MVPA. Conclusions:1.The time of daily average sedentary behavior of boys is less than girls significantly and the time of light physical activity is more than girls in two consecutive years.2.The decrease of the time of daily average sedentary behavior and the increase of the time of the average daily light physical activity are not sufficient to change BMI.3.The influence of students physiological function is not significantly by the limited MVPA, also long time of light physical activity for the physical quality and improve the effect of students is not obvious.