The mean of EPDS scores reduced in both intervene- tion and control groups, and there were no differences between the two groups due to less change in healthy subjects in our study. The exercise program in this study involved aerobic exercise and it was expected that it would have an effect on reducing postpartum depressive symptoms. However, almost all participants in our study were women without high EPDS scores and significant differences were not found. As another reason for non- significant differences, the baseline EPDS score was higher in the control group than in the intervention group, even though we conducted a random allocation. There- fore, control group scores had a potentially steeper decline over time compared to the intervention group.