I started biking again after a couple of year hiatus. I've been biking around 500 miles a month for the last 3 or 4 months. Before that, I lived a rather sedentary lifestyle and my weight was 175 lb and I'm 5'10". Now my weight is 138 lb. So I've lost over 35 lbs in the last 6 months. I don't want to be this skinny, but I eat like a cow. I'm eating a lot healthier food then I did in the past too, and I keep eating past the point of not being hungry. My question is, I guess, how many calories should I be eating given the amount of biking I do? Is my metabolism just off from the sudden increase in exercise and it will eventually balance out? I want to maintain a weight of 145 - 150 lbs, but am having a hard time doing it. Any advice is appreciated.