The blood levels of glutathione peroxidase and superoxide dismutase and serum levels of total antioxidant capacity after exhaustive exercise in the supplemented group were significantly increased ( p < 0.05 ) , while the content of matrix metalloproteinases 2 and 9 , ceruloplasmin and malondialdehyde showed a significant decrease in comparison to the control group ( p < 0.05 ) .