Miss Meb

 I am not an expert by any means, but have asked several dieticians about this and read quite a bit on how the body works in the morning and the general guidance I have been given is that you should eat something before you exercise in the morning or you can actually be doing more harm than good.

During the day, you are supposed to eat every 3-4 hours, at night, you dont have to eat because your body gets fuel from stored glycogen while you are sleeping. The glycogen works for 7-9 hours, but once you are awake and active, the glycogen is either gone or turned off.  When you start working out without eating, your body assumes their is a food shortage and will burn muscle and hang on to fat for dear life.So, while you are working out to build muscle and burn fat, the exact opposite happens if you dont eat something first.

 I excercised for years first thing and then ate something later in the morning (sometimes not until lunch).  When I went to the Corporate Athlete program I was shocked at how high my body fat was. I was in pretty good shape and in the middle of my weight range for height, but my body fat was 40%!  When I talked it through in detail with the nutritionist and trainer, they said it was probably driven by exercising without eating. 

I dont think you have to eat much. I sometimes eat 1/2 an energy bar, handful of nuts or drink a protein shake and then have something more substantial after my workout.  I just eat enough to let my body know- Yes- there is food around, so please burn the fat and build the muscle :)

Good Luck