Erschienen in:
01.10.2004 | Original Article
Effects of active recovery between series on performance during an intermittent exercise model in young endurance athletes
verfasst von:
Magaly Tardieu-Berger, Delphine Thevenet, Hassane Zouhal, Jacques Prioux
Erschienen in:
European Journal of Applied Physiology
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Ausgabe 1-2/2004
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Abstract
The purpose of our study was to compare time to exhaustion (tlim) and time spent at a high level of oxygen uptake (V̇O2) during two high-intensity short intermittent exercises (30 s-30 s) realized with or without series. Eleven young endurance-trained athletes [16.6 (0.4) years] took part in three field tests until exhaustion: (1) a maximal graded test to measure their maximal aerobic velocity (MAV) and maximal oxygen uptake (V̇O2max); (2) and (3) two randomized intermittent exercises (30 s at 110% of MAV alternated with 30 s at 50% of MAV): one alternating repetitions non-stop (IE) and another including 4 min recovery every six repetitions (IEs). The mean tlim measured during IEs was significantly longer than IE [respectively 960.0 (102.0) s vs 621.8 (56.2) s]. The time spent at V̇O2max(tV̇O2max) and the time spent above 90% of V̇O2max(t90%V̇O2max) did not differ significantly according to the type of exercise: with or without series [respectively tV̇O2max was 158.2 (59.7) s vs 178.0 (56.5) s and t90%V̇O2max was 290.4 (84.3) s vs 345.0 (61.6) s] but when expressed as a relative value, t90%V̇O2max during IEs was significantly lower than during IE [respectively 36.4 (10.4)% tlim vs 58.3 (8.7)% tlim]. Despite a significant decrease (P<0.005) of time to achieve 90% of V̇O2max at the start of each series during IEs [respectively 165.0 (43.1) s for the first series and 82.5 (15.8) s for the second series (n=6)] the time spent under 90% of V̇O2max limited the t90%V̇O2max during each series. In conclusion, our results showed that intermittent exercise with series does not permit an increase in the time spent at a high level of V̇O2; however, the athletes performed more repetitions of short intense exercise.