Millet Gregoire P, Candau Robin, Fattori Philippe, Bignet Frank, Varray Alain
UPRES-EA 2991 Sport, Performance, Santé, Faculté des Sciences du Sport, 34090 Montpellier, France.
Can J Appl Physiol. 2003 Jun;28(3):410-23. doi: 10.1139/h03-030.
The purposes of this study were (1) to determine the time sustained above 90% of VO2max in different intermittent running sessions having the same overall time run at the velocity (vVO2max) associated with VO2max, and (2) to test whether the use of a fixed-fraction (50%) of the time to exhaustion at vVO2max (Tlim) leads to longer time spent at a high percentage of VO2max. Subjects were 8 triathletes who, after determination of their track vVO2max and Tlim, performed three intermittent running sessions alternating the velocity between 100% and 50% of vVO2max, termed 30 s-30 s, 60 s-30 s, and 1/2 Tlim, where the overall time at vVO2max was similar (= 3 x Tlim). VO2max achieved in the incremental test was 71.1 +/- 3.9 ml.min-1.kg-1 and Tlim was 236 +/- 49 s. VO2peak and peak heart rate were lower in 30 s-30 s than in the other intermittent runs. The time spent above 90% of VO2max was significantly (p < 0.001) longer either in 60 s-30 s (531 +/- 187 s) or in 1/2 Tlim-1/2 Tlim (487 +/- 176 s) than in 30 s-30 s (149 +/- 33 s). Tlim was negatively correlated with the time (in % of Tlim) spent above 90% of VO2max in 30 s-30 s (r = -0.75, p < 0.05). Tlim was also correlated with the difference of time spent over 90% of VO2max between 60 s-30 s and 30 s-30 s (r = 0.77, p < 0.05), or between 1/2 Tlim-1/2 Tlim and 30 s-30 s (r = 0.97, p < 0.001). The results confirm that vVO2max and Tlim are useful for setting interval-training sessions. However, the use of an individualized fixed-fraction of Tlim did not lead to longer time spent at a high percentage of VO2max compared to when using a fixed work-interval duration.
（1）确定在以与最大摄氧量（VO₂max）相关的速度（vVO₂max）进行相同总跑步时间的不同间歇跑训练中，维持在VO₂max的90%以上的时间；（2）测试在vVO₂max时使用固定比例（50%）的力竭时间（Tlim）是否会导致在高比例VO₂max下花费更长时间。研究对象为8名铁人三项运动员，在确定其跑道vVO₂max和Tlim后，进行了三次间歇跑训练，在vVO₂max的100%和50%之间交替速度，分别称为30秒 - 30秒、60秒 - 30秒和1/2 Tlim，其中在vVO₂max下的总时间相似（= 3×Tlim）。递增测试中达到的VO₂max为71.1±3.9毫升·分钟⁻¹·千克⁻¹，Tlim为236±49秒。30秒 - 30秒训练中的VO₂峰值和心率峰值低于其他间歇跑训练。在60秒 - 30秒训练（531±187秒）或1/2 Tlim - 1/2 Tlim训练（487±176秒）中，维持在VO₂max的90%以上的时间显著长于30秒 - 30秒训练（149±33秒）（p < 0.001）。Tlim与30秒 - 30秒训练中维持在VO₂max的90%以上的时间（占Tlim的百分比）呈负相关（r = -0.75，p < 0.05）。Tlim还与60秒 - 30秒训练和30秒 - 30秒训练之间维持在VO₂max的90%以上的时间差相关（r = 0.77，p < 0.05），或与1/2 Tlim - 1/2 Tlim训练和30秒 - 30秒训练之间维持在VO₂max的90%以上的时间差相关（r = 0.97，p < 0.001）。结果证实，vVO₂max和Tlim有助于设定间歇训练课程。然而，与使用固定的工作间歇时间相比，使用个体化的固定比例Tlim并不会导致在高比例VO₂max下花费更长时间。
