Effect of exercise on postpartum depression and postpartum fatigue

INTERVENTION: A (control): in this group women will get prenatal and postpartum ordinary educations in 3 sessions (each session takes 15‐20 minutes). B (prenatal exercise): in this group women after getting one session of theoretical and practical education about prenatal exercise (30‐40 min) will exercise 3 times a week according to the CD (the materials of this CD was approved by ministry of health and medical education). C (prenatal and postpartum exercise): women in this group in addition to getting education and doing prenatal exercise will do postpartum exercise in 4 first weeks if they can and then 3 times a week according to the postpartum exercise CD. Intervention 1: C (prenatal and postpartum exercise): women in this group in addition to getting education and doing prenatal exercise will do postpartum exercise in 4 first weeks if they can and then 3 times a week according to the postpartum exercise CD. Intervention 2: B (prenatal exercise): in this group women after getting one session of theoretical and practical education about prenatal exercise (30‐40 min) will exercise 3 times a week according to the CD (the materials of this CD was approved by ministry of health and medical education). Intervention 3: A (control): in this group women will get prenatal and postpartum ordinary educations in 3 sessions (each session takes 15‐20 minutes). CONDITION: deppressive episode postpartum depression. ; deppressive episode PRIMARY OUTCOME: Postpartum depression. Timepoint: 1) befor intervention, 2) 4 and 8 weeks after birth. Method of measurement: Edinburgh scale. SECONDARY OUTCOME: Potpartum fatigue. Timepoint: 1)before intervention, 2) 4 and 8 weeks after birth. Method of measurement: fatigue identification form. INCLUSION CRITERIA: INCLUSION CRITERIA: Pregnant women with 26‐32 weeks of gestational age and with an alive fetus; 6 years or over education; not currently suffering from disease that would limit exercise (cardiopulmonary, musculoskeletal,...); not currently taking medication that interferes with heart rate response to exercise ‐ no history of threaded to abortion in present pregnancy ‐ no signs of preterm labor in present pregnancy; not having the placenta previa in present pregnancy; nonexistence of fetal malformations; score of less than 15 on the Edinburgh scale; no history of medication and hospitalization for a psychiatric disorder in the past 6 months; not currently participating in regular high tensity exercise (60 min or more in a week); having the CD‐player set or computer and knowing how to use it. Exclusion criteria: obstetric or concomitant disease which would have preclude participation in an exercise program; any condition that would make exercise unsafe or unwise (vag