Antioxidant enzymes and oxidative stress adaptation to exercise training: Comparison of endurance, resistance, and concurrent training in untrained males

Publication date: June 2014 Source:Journal of Exercise Science & Fitness, Volume 12, Issue 1 Author(s): Kamal Azizbeigi , Stephen R. Stannard , Sirvan Atashak , Marjan Mosalman Haghighi The aim of this study was to compare the effect of endurance training (ET), resistance training (RT), and concurrent training (CT) on circulating antioxidant capacity and oxidative stress. For this purpose, 30 men aged 21.7 ± 2.4 years were assigned to the following three training groups: ET, which included continuous running with incremental intensity that was increased up to 80% of maximal heart rate (n = 10); RT, which included a beginning load of 50% of one repetition maximum (1RM) that was increased up to 80% of 1RM (n = 10); and CT, which included ET and RT programs every other day during the week (n = 10). Activities of superoxide dismutase (SOD) and glutathione peroxidase (GPx) in erythrocytes and total antioxidant capacity (TAC) and malondialdehyde (MDA) level in plasma were measured. The results showed that SOD significantly increased by 21.85% (p = 0.020), 9.54% (p = 0.032), and 14.55% (p = 0.038) in the ET, RT, and CT groups, respectively. Furthermore, the activity of erythrocyte GPx significantly increased in the ET (p = 0.018) and CT (p = 0.042) groups. The TAC increased significantly in the ET (p = 0.040) and CT (p = 0.049) groups compared with the pretest values. The MDA level significantly decreased in the ET group by 32.7% (p = 0.028),...
Source: Journal of Exercise Science and Fitness - Category: Sports Medicine Source Type: research