Fairshter R D, Salness K, Walters J, Minh V D, Wilson A
Respiration. 1987;51(3):223-31. doi: 10.1159/000195205.
It has recently been reported that blood and muscle lactate increased exponentially during incremental exercise, casting some doubt upon the concept of 'anaerobic threshold'. To gain further insight into this controversy, we examined the relationships between minute ventilation (VE), time and oxygen uptake (VO2) in normal subjects during incremental exercise. During exercise, the relationship of VE to either time of exercise or to VO2 appeared curvilinear; VE was reliably described as an exponential function (y = axb + c) of both time of exercise (r2 = 0.96) and VO2 (r2 = 0.92). We also compared variables from 30-second incremental tests with variables obtained from quasi-steady-state incremental tests using cycle and treadmill ergometry. With the exception of heart rate, variables measured at maximum exercise were similar during short-duration and quasi-steady-state incremental tests. These data support the ideas that: there is no abrupt change in metabolism and oxygen availability during progressive exercise, and results of rapid incremental and quasi-steady-state exercise tests are generally comparable in normal individuals.
最近有报道称，在递增运动期间血液和肌肉乳酸呈指数增加，这对“无氧阈值”的概念提出了一些质疑。为了进一步深入了解这一争议，我们研究了正常受试者在递增运动期间分钟通气量（VE）、时间与摄氧量（VO2）之间的关系。在运动过程中，VE与运动时间或VO2之间的关系呈曲线；VE可可靠地描述为运动时间（r2 = 0.96）和VO2（r2 = 0.92）两者的指数函数（y = axb + c）。我们还比较了30秒递增测试的变量与使用自行车和跑步机测力计从准稳态递增测试获得的变量。除心率外，在短时间和准稳态递增测试期间，最大运动时测量的变量相似。这些数据支持以下观点：在渐进性运动期间，代谢和氧供应没有突然变化，并且快速递增和准稳态运动测试的结果在正常个体中通常具有可比性。
