Strength and endurance training does not lead to changes in major markers of oxidative stress

It is well established that demanding training regimes can lead to oxidative stress. In this study we evaluated influence of continuous strength and endurance training program on oxidative stress in male athletes. Total antioxidant activity (TAS) decreased significantly (p < 0.05) between the initial and final measurements in wrestlers after a 4-week intensive endurance training regimen, however, there were no changes in the measurement of other major markers of oxidative stress including superoxide dismutase (SOD), glutathione reductase (GSH-R), glutathione peroxidase (GSH-Px), catalase (CAT). Our data suggest that athletes under endurance training program exhibit low TAS values, but within the reference level, which do not cause negative effect on their sport performance. Data of this research are consistent with previous research (Nielsen et al., 2008) suggesting that no antioxidant supplement (vitamin C and vitamin E) to the diet is needed in athletes undergoing intensive endurance training.