不同方法定量评价跑步经济性隔日测量的可靠性

Evaluating the reliability of every other day running economy measurement quantitatively by using different methods

为了探索RE隔日测量结果的可靠性,采用配对t检验、Pearson相关系数、组内相关系数(intra-class correlation coefficients,ICC)以及Bland-Altman法进行验证。选择12名定向越野和中长跑项目学生运动员作为研究对象,其中女生5名,年龄(20.50±1.00)岁,身高(163.01±4.27)cm、体重(52.96±3.28)kg;男生7名,年龄(20.25±0.71)岁,身高(173.64±4.64)cm,体重(66.57±4.60)kg。隔日测量RE,测试时间和测量顺序均一致,室内气温20℃,湿度45%,结果发现,RE隔日测量结果配对t检验差异没有显著性,相关性呈高度相关;组内相关系数ICC结果较高,Bland-Altman图形中2次RE测量结果差值的分布服从正态分布,所有的差值数据均在95%的一致性界限以内。结果表明,RE隔日测量可靠性比较高,但是,影响RE的因素非常复杂,在实际测量的过程中,要始终保证受试者在前后测量身体处于非疲劳状态,测试前两天保证受试者进行30 min以上的熟悉跑台跑步,前后两次测试顺序和测试时间尽量保持一致。

In order to probe into the reliability of the results of every other day running economy （RE） measure-ment, the author verified the results by using paired ttest, Pearson correlation coefficient, intra-class correlation coefficient （ICC） and Bland-Altman method. The author selected 12 student orienteers and middle and long distance runners as his research subjects, including 5 female students at an age of 20.50±1.00, with a height of 163.01±4.27cm and a weight of 52.96±3.28kg, 7 male students at an age of 20.25±0.71, with a height of 173.64±4.64cm and a weight of 66.57±4.60kg, measured RE at a room temperature of 20oC and a relative humidity of 45%and under the condition of consistent measurement time and order every other day, and revealed the following findings：the results of every other day RE measurement verified by using paired ttest had no significant difference, showing a high correlation;the results verified by using ICC were relatively high, the distribution of the dif-ferences between the 2-time RE measurement results shown in the Bland-Altman diagram presented a normal dis-tribution, all the difference data were within the 95%consistency limit. The said findings indicate the followings：the reliability of every other day RE measurement is high;although it was found by the author that the reliability of every other day RE measurement is high, RE affecting factors are very complicated;during actual measurement, the researcher should always make sure that the testees are in a non fatigue condition physically during the two succes-sive times of measurement, let the testees have an over 30-minute treadmill familiarizing run two days before measurement, and keep the order and time of the two successive times of measurement as consistent as possible.