I try to get to the gym early in the morning. I try to do about 30 to 40 minutes of cardio before working out. I am reading that cardio on an empty stomach in the morning is the best way to lose fat. If I do this and bring a protien bar for after cardio, before weights, is that bad/enough for before weight training? I would come back in the afternoon to do weights but the gym is packed and I like to get in and out. Cardio is available though at this time. Any suggestions to make this the most efficient for both in the morning?