Pre-exercise antioxidant enzyme activities determine the antioxidant enzyme erythrocyte response to exercise

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Bibliographic Details
Title translated into German:Die Aktivität antioxidativer Enzyme vor der Belastung bestimmt die Reaktion der antioxidativen Erythrozyten-Enzyme auf körperliche Belastung
Author:Tauler, P.; Aguilo, A.; Guix, P.; Jimenez, F.; Villa, G.; Tur, J.A.; Cordova, A.; Pons, A.
Published in:Journal of sports sciences
Published:23 (2005), 1, S. 5-13, Lit.
Format: Publications (Database SPOLIT)
Publication Type: Journal article
Media type: Print resource
ISSN:0264-0414, 1466-447X
Online Access:
Identification number:PU201312008820

Author's abstract

Free radical production increases during exercise and oxidative damage occurs in several tissues. We examined the effects of three different exercise tests on the pattern of change of erythrocyte enzyme antioxidant activities. The tests were a short maximal exercise test, a submaximal prolonged exercise test and a cycling stage during competition. The participants were amateur and professional cyclists with different training statuses and different basal erythrocyte antioxidant enzyme activities. The maximal test produced no changes in the erythrocyte antioxidant enzyme activities of amateur sportsmen. The submaximal test, performed at 80% of
maximal oxygen uptake, decreased erythrocyte catalase (12%), glutathione peroxidase determined with H2O2 (14%) and glutathione reductase (16%); superoxide dismutase activity increased by about 25%. The cycling stage performed by professional cyclists increased erythrocyte catalase (29%) and glutathione reductase (10%) activities. The in vivo changes in glutathione reductase activity were confirmed by in vitro measurements hydrogen peroxide decreased and the presence of catalase increased the activity of this enzyme. In conclusion, we suggest that the different erythrocyte antioxidant enzyme responses to diverse exercise tests can be explained by the effects of hydrogen peroxide and the superoxide anion on the antioxidant enzyme activities in erythrocytes. Verf.-Referat