Vitamin A decreases after a maximal incremental stress test in non-professional male runners with low aerobic performance

The data on the effects of aerobic training on plasma antioxidant vitamins are conflicting. Additionally, most studies focus on the oxidative profiles of professional athletes, but limited information is available for amateur athlete populations. The aim of this study was to evaluate the effects of high-intensity exercise on antioxidant vitamins in non-professional runners with varying levels of aerobic power. Eighty-one male runners underwent an incremental test to exhaustion. The study population was then divided into the following tertiles according to VO,max: Group L (LOWVO2Max, <44.2 mLkg-1 min-1), Group M (MediumVO,max, 44.2-49.7 mLkg-1 min-1) and Group H (HIGHVO2 max,>49.7). Comparative analyses were performed between Groups L and H. The total antioxidant capacity- (TAC), Vitamin (Yit) E, Vitamin A, p-carotene, lvcopene and thiobarbituric acid-reactive substances (TBARS) were determined before and 60 inin after exercise testing. After the stress test, Vit A decreased and TBARS increased in Group L, whereas no changes in the vitamin concentrations, TAC induction and TBARS reduction were observed in group H. In individuals with low VO,max, an incremental test determined lipid-peroxidation and Vitamin A consumption, whereas H Group increases TAC that buffer TBARS production.