Efeito da competição sobre biomarcadores salivares de estresse físico e oxidativo em jogadores de futebol

Abstract

Chapter II: Football is a sport with intermittent characteristics, high intensity and emphasis on components of strength, speed and endurance. This sport competition offers a unique setting for assessing stress responses and changes in redox balance. The collection and analysis of less-invasive samples such as saliva, offer the opportunity to collect in the field of training or competition. So, the aim of this study was to evaluate the effect of competition on salivary biomarkers of stress and redox balance in soccer players. The sample consisted of 14 male subjects (24.05 ± 3.1 years, 173 ± 0.05 cm, 71.84 kg ± 8:50). The volunteers were monitored during the college national championship (four games) with an interval of 24 hours between games. Saliva samples were collected before and after the games and put up until the time of analysis. Our findings show that in 4 games SAA and the rate of secretion of total protein post-games showed significant increases over the pre-game moments. Game 1.2 and 3 cortisol levels showed significant increases in post-game moments in relation to pre-game moments. With regard to changes in redox balance, was not observed changes in rates of oxidative damage to lipids before and after 4 games, which were quantified by the concentration of the products of lipid peroxidation (TBARS). On the other hand, total antioxidant response in Game 3 was significantly increased in the post-game compared to the pre-game, shown by the total antioxidant capacity (FRAP). Catalase activity did not change significantly in any of the time points. These results suggest that 3 markers of stress (autonomous activity) showed changes due to athletic competition. The secretion rate of total protein can be an attractive marker of stress, ease and low cost of the method. The games even with little recovery range were not enough to promote oxidative damage to lipids, probably because of the induced training adaptations.