Introduction: The Premenstrual syndrome (PMS) is a combination of distress physical, psychological and behavioral changes that occur in the luteal phase of the menstrual cycle and lead to disordering in individual relationships and normal activities. Since, the etiology of the PMS is not clear, to relief the symptoms of this syndrome, different methods were used. The main object of this project is to compare the effects of 2 different methods of aerobic exercise and vitamin B6 intake on the severity of symptoms of premenstrual syndrome in Non-Athlete girls in 2011-12 .

  Methods : Sixty non - athlete girl students aged 18-25 at Khorasgan University were chosen 5 questionnaires and also daily symptoms the were divided into three aerobic exercise, vitamin B6 and control groups randomly. They aerobic exercise constructed for 8 weeks, 3 sessions in a week, and each session 60 minutes done in the University Club . The experimental group ( vitamins B6) were used a pill every day for 2 month s. After 1 month s the PMS questionnaire was distributed among the 3 groups again (mid-test) and after 2 month s the posttest was conducted.

  Results: The results showed that the severity of symptoms reduced after 1 and 2 (P ≤ 0.001) month s exercise . Also the results indicate that the mean score in decreasing physical, psychological symptoms and total score in Aerobic was more than vitamins B6 and control group (P ≤ 0.05).

  Conclusion: The results of this study concluded that aerobic exercise and vitamins B6 intake can reduce the severity of symptoms of premenstrual syndrome.