Effet de 4 semaines d'entraînement sur le temps limite à max

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Abstract
The purpose of this study was to examine the effect of 4 weeks training in running on the time spent at [Formula: see text]max (tlim [Formula: see text]max). Eight athletes carried out, before and after an aerobic training, an incremental and five exhaustive tests at 90, 95, 100, 115% v [Formula: see text]max and at the critical power at [Formula: see text]max (CV'; slope of the linear relation between the tlim [Formula: see text]max and the distance limit at [Formula: see text]max). This training did not significantly improve [Formula: see text]max (p = 0.17) or tlim [Formula: see text]max (p = 0.72). However, the "tlim [Formula: see text]max-intensity" curve was shifted toward the right, meaning that the athlete had to run at a higher intensity after training to obtain the same tlim [Formula: see text]max. Tlim [Formula: see text]max at CV' before training was significantly higher than tlim [Formula: see text]max at 90, 95, 100, and 115%v[Formula: see text]max(p < 0.05). This training increased CV' in absolute value (13.9 ± 1.3 vs. 14.9 ± 1.2 km h−1, p < 0.05; n = 6) but not in relative value (86 ± 4 vs. 86 ± 5% v [Formula: see text]max; p = 0.9). In conclusion, in spite of the shift of the "tlim [Formula: see text]max-intensity" curve, tlim [Formula: see text]max was not significantly increased by this training. Furthermore, CV' allowed subjects to spend the longest time of exercise at [Formula: see text]max during a continuous exercise with constant speed, but CV', expressed in % v [Formula: see text]max, did not improve with this training. Key words: time limit at [Formula: see text]max, time to reach [Formula: see text]max, performance, oxygen kinetics

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