ok im 6,3 and only weigh 140lbs ive been working out for 4 months now and didnt really gain anything i just toned out a lil bit. i believe i have exremely fast motabolism as i eat alot and shortly after eating im usually in the bathroom. is there anything i can do to slow my matabolism so i can gain some weight? i want to be up to at least 170 or so by next year so i can play on the football team for my highschool. by the way im 16 yrs old. the doctor said its normal because i fall into the not at risk area but not by much. i have 2% bodyfat which isnt good lol but any suggestions?