I just stopped running in college. I ran middle distance (400, 800, 1500). I use to lift weights in high school. I just started lifting again and got on some protein from gnc. I made a bet with a chick though. It was that I could gain more weight in 2 months than she could lose. I need some advice on how to build the most lean muscle mass possible. I dont mind some fat because I have such a low bodyfat % already. Just give me some advice. Maybe a meal plan or how much protein I should consume in a day. I weigh between 170- and 180 right now. How much would it be reasonable to gain?