Venous blood lactate increase after vertical jumping in volleyball athletes |
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Authors: | Chamari K Ahmaidi S Blum J Y Hue O Temfemo A Hertogh C Mercier B Préfaut C Mercier J |
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Institution: | Laboratoire de Recherche APS et Conduites Motrices: Adaptations-Réadaptations, Faculté des Sciences du Sport, Amiens, France. |
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Abstract: | The aim of this study was to test the hypothesis that venous blood lactate concentrations (La–]) would vary from the beginning of brief exercise. Maximal vertical jumping was used as a model of brief intense exercise.
Eleven healthy male volleyball players, aged mean (SE)] 18.5 (0.7) years, performed three exercise tests with different protocols,
each separated by quiet seated recovery periods of 45 min. After the first test, consisting of a single maximal jump lasting
≅0.6 s for the pushing phase, and in which the subjects jumped 64 (2.2) cm], forearm venous La–] increased significantly with respect to rest at 1 min (t
1), 3 min (t
3), and 5 min (t
5) of recovery. The second test, comprising six maximal jumps, each separated by 20-s recovery periods, resulted in an unchanged
La–] with respect to the baseline value. After the third test i.e., six consecutive maximal jumps that lasted a total of 7.36
(0.33) s], La–] increased significantly at t
3 and t
5 with respect to the pre-test value (F=10.3, P<0.001). We conclude that a significant venous La–] increase occurs after vertical jumping. This result may be explained by the activation of lactic anaerobic metabolism at
the very onset of exercise, which participates in energy production and/or in the resynthesis of the phosphocreatine that
was used during such brief exercise.
Electronic Publication |
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Keywords: | Brief exercise Glycolysis Lactate Volleyball athletes |
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