Laursen Paul B, Francis Graeme T, Abbiss Chris R, Newton Michael J, Nosaka Kazunori
School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.
Med Sci Sports Exerc. 2007 Aug;39(8):1374-9. doi: 10.1249/mss.0b013e31806010f5.
Both time-to-exhaustion (TTE) and time-trial (TT) exercise tests are commonly used to assess exercise performance, but no study has directly examined the reliability of comparable tests in the same subjects.
To evaluate the reliability of comparable TTE and TT treadmill running tests of high and moderately high exercise intensity in endurance-trained male distance runners, and to validate Hinckson and Hopkins TT prediction methods using log-log modeling from TTE results.
After familiarization tests, eight endurance-trained male distance runners performed, in a randomized, counterbalanced order, eight trials consisting of two 5-km TT and two 1500-m TT, and four TTE tests run at a speed equivalent to the average speed attained during both the 5-km and 1500-m TT distances.
Typical error of the estimate (TEE) expressed as a coefficient of variation for the 5-km TT, 5-km TTE, 1500-m TT, and 1500-m TTE were 2.0, 15.1, 3.3, and 13.2%, respectively. The standard error of the estimate for predicted TT running speed using log-log modeling from TTE results was 0.67%, and the predicted versus criterion reliability of this method revealed TEE values of 1.6% and 2.5% for the prediction of 5-km and 1500-m TT, respectively.
The variability of 5-km and 1500-m TT tests was significantly less than for similar TTE treadmill protocols. Despite the greater variability of the TTE tests, log-log modeling using the TTE test results reliably predicted actual TT performance.
力竭时间（TTE）和计时赛（TT）运动测试均常用于评估运动表现，但尚无研究直接检验同一受试者中可比测试的可靠性。
评估耐力训练的男性长跑运动员在高强度和中等高强度运动强度下，可比的TTE和TT跑步机跑步测试的可靠性，并使用基于TTE结果的对数-对数模型验证欣克森和霍普金斯TT预测方法。
在熟悉测试后，八名耐力训练的男性长跑运动员以随机、平衡的顺序进行八项试验，包括两次5公里TT和两次1500米TT，以及四次TTE测试，速度相当于在5公里和1500米TT距离中达到的平均速度。
以变异系数表示的5公里TT、5公里TTE、1500米TT和1500米TTE的估计典型误差（TEE）分别为2.0%、15.1%、3.3%和13.2%。使用基于TTE结果的对数-对数模型预测TT跑步速度的估计标准误差为0.67%，该方法的预测与标准可靠性显示，预测5公里和1500米TT时TEE值分别为1.6%和2.5%。
5公里和1500米TT测试的变异性明显小于类似的TTE跑步机方案。尽管TTE测试的变异性更大，但使用TTE测试结果的对数-对数模型可靠地预测了实际TT表现。
