A Comparative Study On The Evaluation Of Cardiorespiratory Fitness Of Middle School Students By 20m Shuttle Run Test And 800/1000m Run

Purposes:This study analyzed and explored the scientific and feasibility of these two methods evaluating the cardiorespiratory fitness of middle school students.Trying to use 800/1000m run test to establish a regression model of estimating the maximum oxygen uptake(VO_2max)for middle school students and a reference standard for evaluation of aerobic capacity based on VO_2max.Methods:This study measured 265?155 male and 110 female?freshmen and sophomores aged 16-18 years in Beijing 101 middle school.All subjects tested morphological indexes?20 m shuttle run test?treadmill test and 800/1000m run test,70 of them?45 males and 25 females?weared portable gas metabolism instruments for field test and treadmill test.Using T-test and pearson correlation analysis to analyze the validity of the two field test methods and use multiple linear regression to establish regression model of estimating VO_2max by the 800/1000m run test,13 of them?7males and 6 females?were back to the retest of regression model.Analyzing the detailed rules,evaluation criteria and the feeling of subjects.Using the percentile method to establish a reference standard for evaluation of cardiorespiratory fitness based on VO_2max.Results:?1?The correlation of VO_2max and VO_2max/kg between 20 m shuttle run test and treadmill test was good,for boys r=0.792?0.529?P<0.01?,for girls r=0.599?P<0.01??0.143?P>0.05?,but for 800/1000m run test,for boys r=0.613?P<0.01??0.294?P>0.05?,for girls r=0.753?P<0.01??0.427?P<0.05?.?2?Under the American standard,14 boys and 11 girls were at high risk of unhealthy,37 boys and 18 girls were at high risk of unhealthy,59 boys and 56 girls were healthy,respectively.The of male and female students reached the standard of 52 and 59 respectively,and those below the standard of 58 and 26 respectively.Under the Portuguese standard,62 boys and 79girls reached the standard of cardiorespiratory fitness respectively.48 and 6 persons are below the standard respectively;Under Japanese standards,37 boys scored 4 points and39 girls scored 5 points.Under the evaluation standard of the 800/1000m run test,52and 60 boys and girls are good respectively.?3?36.20%of the students knew about the20m shuttle run test,while 63.8%of the students didn't.During the test,the fatigue degree was mainly focused on very tired and a little tired,and the 800/1000m run test was mainly focused on very tired and very tired.During the test,the physical discomfort in the 20m shuttle run test and the 800/1000m run test was mainly concentrated in the heart and lungs.In terms of the selection tendency of test items,37.82%chose the 20m shuttle run test,33.33%chose the 800/1000m run test,and 28.85%did not care.?4?The regression model of VO_2max by the 800/1000m run test were:?1?VO_2max?L/min?=4.434-0.005×gender?boy 1,girl 2?×time?s??R²=0.546,SEE=0.539 L/min??2?VO_2max?L/min?=1.640-0.004×gender?boy 1,girl 2?×time?s?+0.037×weight?kg??R²=0.703,SEE=0.440 L/min?.?5?The reference level,which is using VO_2max for cardiorespiratory fitness evaluation of middle school students for boys:?upper:?3.83L/min;upper middle:3.51³.82L/min;middle:2.93³.50 L/min;lower middle:2.70².92 L/min;lower:?2.69 L/min?;for girls:?upper:?2.16 L/min;upper middle:2.06².15 L/min;middle:1.61².05 L/min;lower middle:1.43¹.60 L/min;lower:?1.42 L/min?.Conclusions:?1?The 20m shuttle run test and the 800/1000m run test all can elevate the cardiorespiratory fitness of middle school students,but the 20m shuttle run test's feasibility was bad,so the 20m shuttle run test could not substitute for 800/1000m run test.?2?The regression model of VO_2max by the 800/1000m run test was:VO_2max?L/min?=1.640-0.004×gender?male 1,female 2?×time?s?+0.037×weight?kg?.?3?The study built the reference level for cardiorespiratory fitness evaluation of middle school students.