Billat V L, Morton R H, Blondel N, Berthoin S, Bocquet V, Koralsztein J P, Barstow T J
Centre de médecine du sport Caísse Centrale des Actívités Sociales (CCAS), Paris, France.
Eur J Appl Physiol. 2000 Jun;82(3):178-87. doi: 10.1007/s004210050670.
The purpose of this study was to characterise the relationship between running velocity and the time for which a subject can run at maximal oxygen uptake (VO2max), (tlimVO2max). Seven physical education students ran in an incremental test (3-min stages) to determine VO2max and the minimal velocity at which it was elicited (vVO2max). They then performed four all-out running tests on a 200-m indoor track every 2 days in random order. The mean times to exhaustion tlim at 90%, 100%, 120% and 140% vVO2max were 13 min 22 s (SD 4 min 30 s), 5 min 47 s (SD 1 min 50 s), 2 min 11 s (SD 38 s) and 1 min 12 s (SD 18 s), respectively. Five subjects did not reach VO2max in the 90% vVO2max test. All the subjects reached VO2max in the runs at 100% vVO2max. All the subjects, except one, reached VO2max in the runs at 120% vVO2max. Four subjects did not reach VO2max in the 140% vVO2max test. Time to achieve VO2max was always about 50% of the time to exhaustion irrespective of the intensity. The time to exhaustion-velocity relationship was better fitted by a 3- than by a 2-parameter critical power model for running at 90%, 100%, 120%, 140% vVO2max as determined in the previous incremental test. In conclusion, tlimVO2max depended on a balance between the time to attain VO2max and the time to exhaustion tlim. The time to reach VO2max decreased as velocity increased. The tlimVO2max was a bi-phasic function of velocity, with a peak at 100% vVO2max.
本研究的目的是描述跑步速度与受试者在最大摄氧量（VO2max）下能够持续跑步的时间（tlimVO2max）之间的关系。七名体育专业学生进行了递增测试（每阶段3分钟），以确定VO2max以及引发VO2max的最小速度（vVO2max）。然后，他们每隔2天在200米室内跑道上以随机顺序进行四次全力跑步测试。在90%、100%、120%和140% vVO2max速度下的平均疲劳时间tlim分别为13分22秒（标准差4分30秒）、5分47秒（标准差1分50秒）、2分11秒（标准差38秒）和1分12秒（标准差18秒）。在90% vVO2max测试中，五名受试者未达到VO2max。在100% vVO2max的跑步中，所有受试者均达到VO2max。除一名受试者外，所有受试者在120% vVO2max的跑步中均达到VO2max。在140% vVO2max测试中，四名受试者未达到VO2max。无论强度如何，达到VO2max的时间始终约为疲劳时间的50%。根据先前的递增测试确定，在90%、100%、120%、140% vVO2max速度下跑步时，疲劳时间与速度的关系用三参数临界功率模型比二参数临界功率模型拟合得更好。总之，tlimVO2max取决于达到VO2max的时间和疲劳时间tlim之间的平衡。达到VO2max的时间随着速度的增加而减少。tlimVO2max是速度 的双相函数，在100% vVO2max时达到峰值。
