From the time I was 12-17 years old I weighed about 180lbs. I went off the deep end when I was 17 though and lost 40lbs. What can I say, cocaine is a hell of a drug. I'd prefer to put some weight back on, but muscle, not fat. I've been about 140 and stable ever since then. I don't get enough exercise. Smoking for about 7 years now, it would be brutal on my longs to start running, but I plan on quitting by the end of next year and I'll start running once I do. I did a sit-up wrong or something a year or two ago, now if I do more than 5-10 my gut starts hurting. Thanks to JROTC in highschool, I can still drop and do a shitload of pushups uninterrupted. Other than that, its subtle exercise here and there. Walking to the mailbox, the store, not cruising a parking lot for an hour looking for a spot to park... Hike some. Play with my nephew some. Otherwise, I need to do a bit more. Delta47, you a senior or you still have time left in highschool? At that size, I'd be looking into playing football. If you are conditioned enough to play the game, I'd guarantee you they got a spot for you.