Decrease of O2 deficit is a potential factor in increased time to exhaustion after specific endurance training
Decrease of O2 deficit is a potential factor in increased time to exhaustion after specific endurance training
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DOI：
10.1152/jappl.2001.90.3.947
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发表时间：
2001-03-01
影响因子：
3.3
通讯作者：
Billat, VL
中科院分区：
文献类型：
--
作者：
Demarle, AP;Slawinski, JJ;Billat, VL
本研究的主要目的是调查 8 周剧烈间歇训练计划对摄氧动力学参数（例如缺氧和慢速成分）的影响，以及在训练前后以相同绝对速度进行的剧烈跑步中，它们对直到力竭为止的时间的潜在影响。六名接受过耐力训练的跑步者在 400 米的合成跑道上以最大耗氧量 93% 的速度进行增量测试和全力以赴的测试，以评估直到筋疲力尽的时间。这些测试是在严格间歇训练计划 8 周之前和之后进行的，该计划包括每周两次最大耗氧量 93% 速度的间歇训练和每周 3 次最大耗氧量 60-70% 速度的连续恢复训练。缺氧和慢成分均与力竭前的时间无关（分别为 r = -0.300、P = 0.24、n = 18 与 r = -0.420、P = 0.09、n = 18）。训练后，氧亏明显下降（P = 0.02），慢成分没有变化（P = 0.44）。只有 3 名受试者在精疲力尽之前的时间大大缩短了（分别提高了 10%、24% 和 101%）。氧亏缺的变化与力竭时间的变化显着相关(r = -0.911, P = 0.01, n = 6)。结论是；在特定的耐力训练计划之后进行的剧烈跑步中，缺氧量的减少是导致精疲力尽的时间增加的潜在因素。
The main purpose of this study was to investigate the effects of an 8-wk severe interval training program on the parameters of oxygen uptake kinetics, such as the oxygen deficit and the slow component, and their potential consequences on the time until exhaustion in a severe run performed at the same absolute velocity before and after training. Six endurance-trained runners performed, on a 400-m synthetic track, an incremental test and an all-out test, at 93% of the velocity at maximal oxygen consumption, to assess the time until exhaustion. These tests were carried out before and after 8 wk of a severe interval training program, which was composed of two sessions of interval training at 93% of the velocity at maximal oxygen consumption and three recovery sessions of continuous training at 60-70% of the velocity at maximal oxygen consumption per week. Neither the oxygen deficit nor the slow component were correlated with the time until exhaustion (r = -0.300, P = 0.24, n = 18 vs. r = -0.420, P = 0.09, n = 18, respectively). After training, the oxygen deficit significantly decreased (P = 0.02), and the slow component did not change (P = 0.44). Only three subjects greatly improved their time until exhaustion (by 10, 24, and 101%). The changes of oxygen deficit were significantly correlated with the changes of time until exhaustion (r = -0.911, P = 0.01, n = 6). It was concluded that; the decrease of oxygen deficit was a potential factor for the increase of time until exhaustion in a severe run performed after a specific endurance-training program.