Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

V̇O2 responses to different intermittent runs at velocity associated with V̇O2max.

Abstract : 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 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.
Type de document :
Article dans une revue
Liste complète des métadonnées
Contributeur : Alain Varray Connectez-vous pour contacter le contributeur
Soumis le : mardi 24 octobre 2017 - 14:13:28
Dernière modification le : mercredi 5 octobre 2022 - 15:24:43



Alain Varray, Grégoire P. Millet, Robin Candau, Philippe Fattori, Frank Bignet. V̇O2 responses to different intermittent runs at velocity associated with V̇O2max.. Canadian Journal of Applied Physiology, Human Kinetics, 2003, pp.410-23. ⟨10.1139/h03-030⟩. ⟨hal-01622489⟩



Consultations de la notice