Billat V, Renoux J C, Pinoteau J, Petit B, Koralsztein J P
Laboratoire S.T.A.P.S., Université Paris XII, Créteil, France.
Med Sci Sports Exerc. 1994 Feb;26(2):254-7. doi: 10.1249/00005768-199402000-00018.
The purpose of this study was to assess the reproducibility of running time to exhaustion (Tlim) at maximal aerobic speed (MAS: the minimum speed that elicits VO2max), on eight subelite male long distance runners (29 +/- 3-yr-old; VO2max = 69.5 +/- 4.2 ml.kg-1.min-1; MAS = 21.25 +/- 1.1 km.h-1). No significant differences were observed between Tlim measured on a treadmill at a 1-wk interval (404 +/- 101 s vs 402 +/- 113 s; r = 0.864); however, observation of individual data indicates a wide within-subjects variability (CV = 25%). In a small and homogenous sample of runners studied, exercise time to exhaustion at MAS was not related to VO2max (r = 0.138), MAS (r = 0.241), running economy (mlO2.kg-1.min-1 at 16 km.h-1) (r = 0.024), or running performance achieved for 3000 m (km.h-1)(r = 0.667). However, Tlim at MAS was significantly related to the lactate threshold determined by the distinctive acceleration point detected in the lactate curve around 3-5 mmol.l-1 expresses in %VO2max (r = 0.745) and to the speed over a 21.1-km race (km.h-1) (r = 0.719). These data demonstrate that running time to exhaustion at MAS in subelite male long distance runners is related to long distance performance and lactate threshold but not to VO2max or MAS.
本研究旨在评估八名次精英男性长跑运动员（年龄29±3岁；最大摄氧量=69.5±4.2毫升·千克⁻¹·分钟⁻¹；最大有氧速度=21.25±1.1千米·小时⁻¹）在最大有氧速度（MAS：引发最大摄氧量的最小速度）下力竭跑步时间（Tlim）的可重复性。在跑步机上以1周的间隔测量的Tlim之间未观察到显著差异（404±101秒对402±113秒；r=0.864）；然而，对个体数据的观察表明受试者内部存在较大变异性（变异系数=25%）。在所研究的一小群同质跑步者样本中，MAS下的力竭运动时间与最大摄氧量（r=0.138）、MAS（r=0.241）、跑步经济性（16千米·小时⁻¹时的毫升氧气·千克⁻¹·分钟⁻¹）（r=0.024）或3000米跑步成绩（千米·小时⁻¹）（r=0.667）无关。然而，MAS下的Tlim与通过乳酸曲线中约3 - 5毫摩尔·升⁻¹处独特加速点确定的乳酸阈值显著相关（以最大摄氧量百分比表示）（r=0.745），并与21.1千米比赛中的速度（千米·小时⁻¹）（r=0.719）相关。这些数据表明，次精英男性长跑运动员在MAS下的力竭跑步时间与长跑成绩和乳酸阈值有关，而与最大摄氧量或MAS无关。
