I exercise 4 times a week (high intensity cardio), follow a strict diet and take my eltroxin on time everyday, however i still cannot loose the weigh?

Hypothyroid: Many times this occurs when the etiology of the weight gain is actually thyroid related and not so much the amount you exercise or consume, You should get a Thyroid Hormone level tested by a blood test

Wt: It depends on what your strict diet means. You may still not be eating the right food . You need to see a dietitian and be followed to make sure you comply . It's an absolute fact that if you eat less calories than your body uses you will lose wt.