Hello, Thanks for the query. In spite of exercise you are gaining weight and this is problem. Regular exercise very good but proper exercise and proper diet will maintain your weight. Please go through your dietary habit and you will find the cause. As all endocrinology tests have been done so need not to worry because there is no chances of any diseases. Oily fatty food, with plenty of carbohydrates are the main culprit in our weight gain in India. Rapid walk for at least one hour is most suitable to maintain weight. Good luck.