Without being a smartass, why don't you warm up, get a spot at the gym and try it.
Why don't you tell us your current height, weight, year in school, speed in 40 yd dash, position you're most likely to play, curent workout routine, etc. You'll probably get lots of help here. Does you school have a strengh/condiioning program? You may want to talk to the football coach and/or conditioning coach to see what they would recommend.