Mikesell K A, Dudley G A
Med Sci Sports Exerc. 1984 Aug;16(4):371-5.
This study examined the time course of the aerobic response to strenuous training in well-conditioned distance runners when intensity was held fairly constant relative to maximal aerobic power, and the effect of this training on 10-km run time. Seven runners trained 6 d/wk for 6 wk. On 3 d/wk they ran as far as possible in 40 min, with the intention of running a greater distance each run. On alternate days the subjects performed five 5-min rides on a cycle ergometer (CE) separated by 5-min intervals of jogging, with the resistance adjusted to induce peak-CE VO2 during minutes 4 and 5 of each ride. Peak-CE VO2 increased (56.1 to 65.0 ml X min-1 X kg-1, P less than 0.05) in a linear manner (r = 0.95, P less than 0.01) during the first 5 wk. The average weekly increase was 0.11 l X min-1. Unexpectedly, peak-CE VO2 decreased significantly after week six. Treadmill VO2max was not significantly different after training. The mean decrease (P less than 0.05) in 10-km run time was approximately 81 S. These data suggest an adaptation of constant magnitude of the factor(s) which limit peak-CE VO2 when training intensity is maintained relative to improvement. However, this linear response and training intensity may be maintained only on a limited basis without expecting some decline in performance and aerobic power.
本研究调查了训练有素的长跑运动员在强度相对于最大有氧功率保持相当恒定的情况下，对高强度训练的有氧反应的时间进程，以及这种训练对10公里跑时间的影响。7名跑步者每周训练6天，共训练6周。他们每周有3天在40分钟内尽可能跑远，目的是每次跑步都跑更远的距离。在交替的日子里，受试者在自行车测力计（CE）上进行5次5分钟的骑行，每次骑行之间间隔5分钟的慢跑，通过调整阻力，使每次骑行的第4分钟和第5分钟达到CE峰值摄氧量（VO2）。在前5周内，CE峰值VO2呈线性增加（从56.1至65.0毫升·分钟-1·千克-1，P<0.05）（r = 0.95，P<0.01）。平均每周增加0.11升·分钟-1。出乎意料的是，在第6周后，CE峰值VO2显著下降。训练后跑步机最大摄氧量（VO2max）无显著差异。10公里跑时间平均减少（P<0.05）约81秒。这些数据表明，当训练强度相对于提高幅度保持不变时，限制CE峰值VO2的因素会产生恒定幅度的适应性变化。然而，这种线性反应和训练强度可能只能在有限的基础上维持，否则成绩和有氧能力会出现下降。
