Background and objectives: The aim of this study was to investigate the effect of eight weeks of aerobic exercise on serum iron, serum ferritin, platelet count, mean platelet volume, and some immunity indices in nonathlete females. Methods: In this study, 30 non athlete females aged 30 45 years were randomly divided into an experimental and a control group. The experimental group was subjected to perform aerobic exercise at 60 70% of maximal heart rate for eight weeks, three sessions per week and one hour per session. Blood parameters were measured before the exercise program and after the completion of program by taking 2 ml blood samples from the venous vein of the participants in the sitting position. Finally, ttest was used to compare the pretest and post test means of each group and independent ttest was used to compare the two groups at significance of 0.05. Results: After eight weeks of aerobic exercise, there was a significant inrease in mean platelet volume and a significant decrease in serum iron and ferritin levels in the experimental group (P <0.05). There was a slight decrease in the number of platelets, white blood cells, granulocytes, monocytes and lymphocytes (P<0.05). Conclusion: We recommend physical education instructors, athletes and nonathletes to consider iron supplementation during aerobic exercise, and modify appropriate training intensity based on the fitness and age of trainees to prevent risk of anemia.

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