Some people like to do cardio first thing with an empty stomach, but you are probably going to the gym to lift. I must eat before I workout, it fuels my fire. I usually eat 3 meals before the gym...but I go after work. I used to workout before work, I would eat something fast, like an MRP and a banana, or weight gainer shake and banana. My personal favorite is oatmeal, banana, and small protein shake. But definetly get some calories in you it will help, some good ol' carbs. I would have to say it will slow your progress a little because you won't have the energy to lift big. Just my 2 cents. Peace.
E-dawg,