In all societies, many women suffer from pre-menstrual syndrome (PMS). In fact, PMS is the term for a group of emotional, mental, and physical symptoms that affect women during the days leading up to menstrual period. The symptoms are various such as fluid retention, mood changes, depression, weight gain, urinary tract infection, breathlessness, nasal congestion, headaches, susceptibility to conjunctivitis, etc. The exact cause of PMS is unknown, but it is thought to be related to hormonal imbalances. Also at the time of menstruation, some women suffer from mild to severe pains in the abdominal area. The uterus under goes strong and frequent contractions. Women who suffer from Dysmenorrhoea (Menstrual pain and cramping) have uterine contractions that are particularly painful. Dysmenorrhoea is thought to be caused by prostaglandins, a natural chemical that stimulates the uterus to contract to expel blood. Prostaglandins make blood vessels constrict, slowing down blood flow to the uterus. Hence, the present investigator thought of studying the effect of Yoga and Aerobic exercises on Health related physical fitness of College girls with irregular menstruation. One Thousand two hundred (n=1200) female subjects, age: 17-19 yrs., from S.N.D.T College, Churchgate, Mumbai – 400 020 were surveyed for menstruation status.