yeah i play college football and lifting is really big deal. protein is probably the most important thing(it helps rebuild muscles after you lift). I have always been pretty thick but i always use 100% Chocolate Whey Protein from GNC. also just keep eating healthy but eat good portions. You have to make sure you fuel your body enough. I personally don't use creatine but many of my friends do and it has helped them. also make sure you don't over lift too. It isn't necessarilly the more you lift the better. it isn't good to lift your upper body everyday. make sure if you only lift upper body that you only lift every other day. hopefully these tips help. good luck