Each female sets her experience of 47 manifestations on a 6 point scale separately for the premenstrual, menstrual and intermenstrual phases of her latest and worst menstrual cycle. Daily Symptoms Report was filled at the start and at end of the study (before and after performing swimming exercise) Females in group I were instructed to engage into swimming exercise 30 minutes daily, 3 times weekly for 3 months. Exercise was ceased on the first 3 days of menstrual cycle then resumed afterwards.