Hello... I'm 29 years old and have been an avid runner for the past 5 years. I quit running when I was about 6 months pregnant with my daughter and picked it back up again as soon as I got the doctor's okay. Well, when in training for a marathon, where I had ran at least 50 miles a week, I packed on 30 lbs! I also started tracking my calories, thinking I was eating too much. I finally got into the doctor after the weight gain, constant illness, and draining fatigue to find out I had hypothyroidism! So I take my medicine... still run like hell and watch my calories and still can not get rid of the weight I had gained. It is pretty taxing on my body carrying an extra 30-40 lbs along with me for all of the miles I run. Anybody else have this problem and hopefully some good insight and advice? It would be appreciated!