ROC曲线法建立大学生健康体力活动水平参考标准

Research on establishing the reference standard of college students’physical activity level by means of ROC curve method

分析大学生体力活动水平、静坐时间与功能动作、身体素质表现的相关性,建立大学生健康体力活动水平和适宜静坐时间参考标准。采用《国际体力活动问卷(IPAQ-LF)》调查232名普通大学生的体力活动水平和静坐时间,进行Cook等的功能动作筛查测试和《国家学生体质健康标准》中的身体素质测试,运用Kendall’s tau_b相关法和ROC曲线法进行统计分析。结果显示:(1)大学生体力活动水平与功能动作直线弓箭步、主动直腿上抬、旋转稳定性的评分以及立定跳远的成绩均呈正相关(r值分别为0.188、0.113、0.122和0.127,P<0.05),体力活动水平与50 m跑成绩、工作日静坐时间与肺活量、休息日静坐时间与直线弓箭步评分均呈负相关(r值分别为-0.175、-0.220和-0.158,P<0.05)。(2)大学生健康体力活动水平参考标准为≥1800 Mets,工作日适宜静坐时间为≤200 mins/d,休息日适宜静坐时间为≤450 mins/d。结果表明:健康体力活动水平以及适宜静坐时间参考标准的建立对普通大学生日常健身具有较大的指导意义。

To analyze the relationship among college students’physical activity level,functional movement and physical quality performance,and to establish reference standards for healthy physical activity level and the suitable sitting time for college students.Adopting IPAQ-LF to survey,using FMS and physical quality test to measure 232ordinary undergraduates’physical activity level and the sitting time,and then carrying on the statistics of Kendall’s tau_b correlation and ROC analysis.Results showed that:(1)there was a significant positive correlation between the level of physical activity and the performance of straight lunge,active straight leg lift,rotation stability and standing long jump(r values are 0.188、0.113、0.122 and 0.127,respectively,P<0.05),and there was a significant negative correlation between physical activity level and 50-meter running performance,sitting time on weekdays and vital capacity,the sitting time on rest days and straight lunge(r values are-0.175,-0.220 and-0.158,respectively,P<0.05).(2)The healthy level of physical activity is for≥1800 mets,the sitting time on working day is suitable for≤200 mins/day,meditation time on rest day is suitable for≤450 mins/day by using ROC curve.The conclusions indicated that three reference standards have great guidance value for college students’physical fitness activity.