Prediction of Risk Cutoff Points for Obesity Among Students Aged 7～12 at Different Altitudes based on Physical Activity and Sedentary Time
Objective To explore the correlation between physical activity,sedentary behavior,and obesity among students aged 7∼12 at different altitudes,and to predict the risk cutoff points for physical activity and sedentary time in obesity.Method A total of 720 students aged 7∼12 years old,residing in the plain and pla-teau respectively,were selected as the research subjects.Through morphological testing and physical activity as-sessment,the physical activity and sedentary time cutoff values of obesity risk for students aged 7∼12 years old at different altitudes were determined.Result As age increases,BMI levels of students aged 7∼12 at different altitudes show an upward trend,while WHR levels show a downward trend;The detection rate of high altitude students is 10.00%,and that of low altitude students is 12.36%,with significant differences in detection rates be-tween altitudes(χ2=8.167,P<0.05).As age increases,the physical activity related indicators and ST of both males and females in each group show an upward trend;The levels of LPA,MPA,VPA,MVPA,and TPA among students aged 7∼12 in low altitude areas were significantly higher than those in high altitude areas(P<0.05),while ST levels were significantly lower than those in high altitude areas(P<0.05).As BMI increases,physical ac-tivity indicators show a trend of first increasing and then decreasing,while ST levels show a trend of first decreas-ing and then increasing;There is a correlation between the levels of LPA,MPA,VPA,MVPA,TPA,and ST in high altitude and low altitude male and female students and BMI(P<0.05);There is a significant correlation be-tween the levels of MPA,MVPA,ST and BMI among students aged 7∼12 at high and low altitudes.The cutoff values of MVPA and ST for predicting obesity in male and female groups were 97.42 min-1,735.46 min-1,88.59 min-1,771.30 min-1,115.34 min-1,691.92 min-1,92.71 min-1,and 720.45 min-1,respectively.Conclusion There is a significant correlation between physical activity and sedentary time indicators and the incidence of obesity among students aged 7∼12 at different altitudes.The cutoff point values of sedentary time for males and females aged 7∼12 at high altitudes are higher than those of students in the same age group.The cutoff point values of MVPA for males and females aged 7∼12 at high altitudes are higher than those of students in the same age group.
altitudestudents aged 7∼12 yearsphysical activitysedentary timebody mass indexobesity
NETL
NSTL
万方数据
维普
