McGehee James C, Tanner Charles J, Houmard Joseph A
Department of Exercise and Sport Science, East Carolina University, Greenville, NC 27858, USA.
J Strength Cond Res. 2005 Aug;19(3):553-8. doi: 10.1519/15444.1.
The purpose of this study was to examine the accuracy of tests that may be used by distance runners to estimate the lactate threshold. Competitive distance runners/triathletes (N = 27) performed a criterion test that directly measured (blood lactate of 4.0 mmol.L(-1)) the lactate threshold. Subjects then performed 4 tests (VDOT, 3,200-m time trial, 30-minute time trial, Conconi) that estimate the threshold. Mean estimations of the running velocity at the lactate threshold from the 30-minute time trial (standard error of the estimate, SEE, 0.21 m.s(-1)) and VDOT (SEE 0.41 m.s(-1)) methods did not differ (P>0.05) from the criterion. In terms of heart rate, the 30-minute time trial estimation did not significantly differ (SEE 8.0 b.min(-1)) from criterion. These findings suggest that the 30-minute time-trial method should be considered by coaches and distance runners/triathletes as a method for estimating both the running velocity and heart rate at the lactate threshold.
本研究的目的是检验长跑运动员用于估计乳酸阈的测试的准确性。竞技长跑运动员/铁人三项运动员（N = 27）进行了一项标准测试，该测试直接测量（血乳酸为4.0 mmol.L(-1)）乳酸阈。受试者随后进行了4项估计乳酸阈的测试（VDOT、3200米计时赛、30分钟计时赛、康科尼测试）。30分钟计时赛（估计标准误差，SEE，0.21 m.s(-1)）和VDOT（SEE 0.41 m.s(-1)）方法对乳酸阈时跑步速度的平均估计与标准测试结果无差异（P>0.05）。就心率而言，30分钟计时赛的估计与标准测试结果无显著差异（SEE 8.0 b.min(-1)）。这些发现表明，教练和长跑运动员/铁人三项运动员应将30分钟计时赛方法视为一种估计乳酸阈时跑步速度和心率的方法。
