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Background and Objective: Physical activities affect on antioxidative pathway. Varity, period and intensity of activities are important in health improvement. This study was carried out to determine the effect of short and medium periods of high intensities aerobic training on serum level of superoxide dismutase (SOD) and Catalase (CAT) enzymes in female rats. Methods: In this experimental study, 45 Sprague Dawley female rats were randomly allocated into control, short (4 weeks) and medium (8 weeks) of high intensities aerobic training groups. The exercise program was performed on 5 session in each week with speed of 10-17 meters per minute in slope range (5

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Background and Objective: Different physical activities affect on anti-oxidative system. Varity, period and intensity of activities are necessary in health improvement. This study was carried out to determine the effect of medium period of progressive anaerobic training on serum level of superoxide dismutase and Catalase in female rats.

Methods: In this experimental study, 30 female rats were randomly allocated into control and anaerobic training groups. The training program lasted for 8 weeks with control (without activity) and anaerobic including 3 sessions in a week with speed of 24-30 meters per minute in slope range (515) for 30 seconds.

Results: Serum level of superoxide dismutase was significantly increased in progressive anaerobic training group (109.1±17.3 U/ml) in compare to controls (98.8±12.8 U/ml) (P<0.05). Serum level of Catalase was 51.2±7.2 and 48.4±4.2 U/ml in control and progressive anaerobic training, respectively. This difference was not significant.

Conclusion: The medium period of progressive anaerobic training influences serum level of superoxide dismutase and Catalase in female rats.