you can do it. it's difficult, but you can do it. just don't give up, and understand that it wasn't "one meal" or "one day" that got you up to that weight, and it's going to be the same process to bring you back down. before i joined the army, i weighed 172, now i'm at 125 (i'm short, 5'4") and able to do over 100 push-ups and sit-ups in 2 minutes and running sub 12 minutes 2-miles. maintaining is probably the hardest part.