Effet d'un exercice de sprint de 30 s sur le statut antioxydant plasmatique

Abstract

Introduction. – A recent study (Groussard et al., personal communication) demonstrated that a single sprint exercise (30 s) induced an increase in lipid radical production and an alteration of blood enzymatic antioxidant system. So we hypothesised that the same exercise may also affect plasma non enzymatic antioxidant status. Method and results. – Eight students in physical education performed a Wingate test. Plasma nonenzymatic antioxidant status (uric acid, vitamins C and E, β-carotene) was determined at rest (R), after the warm up (E), after the exercise (P 0), and at 5 (P 5), 10 (P 10), 20 (P 20) and 40 (P 40) minutes of recovery. We observed an increase in plasma uric acid and vitamin C respectively since P 10 et P 20. Inversely, the Wingate test induced a decrease in plasma vitamin E concentration at P 5 and P 10 which then return to basal values and a decrease in plasma β-carotene concentration since P 5. Conclusion. – These results demonstrated that a short (30 s) single sprint exercise alters plasma non-enzymatic antioxidant status.