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- Title
Influence of exercise intensity on time spent at high percentage of maximal oxygen uptake during an intermittent session in young endurance-trained athletes.
- Authors
Thevenet, Delphine; Tardieu, Magaly; Zouhal, Hassane; Jacob, Christophe; Abderrahman, Ben; Prioux, Jacques
- Abstract
The purpose of this study was to compare, during a 30s intermittent exercise (IE), the effects of exercise intensity on time spent above 90% $${\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}} (t90\,{\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}})$$ and time spent above 95% $${\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}} (t95\,{\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}})$$ in young endurance trained athletes. We hypothesized that during a 30sIE, an increase in exercise intensity would allow an increase in $$t90\,{\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}}\;\hbox{and}\;t95\,{\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}}$$ due to a decrease in time to achieve 90% or 95% of $${\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}}.$$ Nine endurance-trained male adolescents took part in three field tests. After determination of their $${\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}}$$ and maximal aerobic velocity (MAV), they performed, until exhaustion, two intermittent exercise sessions alternating 30s at 100% of MAV (IE100) or 110% of MAV (IE110) and 30s at 50% of MAV. Mean time to exhaustion ( t lim) values obtained during IE100 were significantly longer than during IE110 ( p < 0.01). Moreover, no significant difference was found in $$\hbox{t}90{\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}}\;\hbox{or}\; \hbox{t}95 {\dot{\hbox{V}}\hbox{O}}_{{{\rm 2max}}}$$ expressed in absolute or relative (% t lim) values between IE100 and IE110. In conclusion, an increased of 10% of exercise intensity during a 30s intermittent exercise model (with active recovery), does not seem to be the most efficient exercise to solicit oxygen uptake to its highest level in young endurance-trained athletes.
- Subjects
EXERCISE; ATHLETES; PHYSICAL fitness; FATIGUE (Physiology); OXYGEN
- Publication
European Journal of Applied Physiology, 2008, Vol 102, Issue 1, p19
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-007-0540-6