[Lipid peroxidation and the antioxidant system in patients with bronchial asthma and asthmatic bronchitis subjected to graded physical load].

A study was made of lipid peroxidation and the antioxidant system in patients with bronchial asthma (BA) and chronic asthmatic bronchitis (CAB) before and after muscular exercise. Physical exercise in BA patients was accompanied by an increase in the amount of hydroperoxides and a raised activity of superoxide dismutase (SOD) and a drop of peroxidase and catalase activity. Peroxidase and SOD activity did not increase in CAB patients in whom muscular exercise caused no bronchospastic syndrome in the presence of an increase in the amount of hydroperoxides.