im on a sports teams im playing baseball right now and im gonna sign up for lacrosse and basketball in the winter and nothing works maybe im doing something wrong how many sit ups should i be doing a day and how heavy of weights should i be lifting to get rid of this fat i mean the only thing i want is some abs and loose all the upper body fat and turn it into muscle. im 5'9 180 and i have pretty big muscles the only problem is my stomach and my chest please tell me how many sit ups and how heavy of weights i should be lifting