Im a 15 yr old, 5ft 103lbs female. My bmr is approx. 1200. I work out everyday - my workouts equaling 1300-1400 burn a day. Coupled with my bmr, that's 2500-2600 burned each day. I usually only eat a total of 1800cal. I haven't lost weight-in fact, I've gained some. Im wondering if I'm slowing my metabolism by eating less than my bmr. If so, should I eat back my work out cal in order to equal my bmr? Will this help me lose weight?