Running should be fine in the morning, but keep in mind that the body needs protein so that you don't lose muscle while being a runner. While runners often have very lean bodies, no fat, you will also find religious runners also begin to lose muscle, which to me is unattractive and not healthy, b/c your muscles are what holds the skeleton together and keeps the bones from breaking.
When you do cardio, the body takes from the sugar in the body. When that is depleted, it goes to the muscle to get energy.
The way to handle this is to have a good protein filled breakfast (boiled egg is only 90 cals), (7 almonds are about 50 or so cals), and fruit like an apple that will give you the carbs to have the energy to run, and a banana that will provide potassium to keep from having muscle cramps.
Eat early enough to digest and also water to get hydrated before the run. :)
at 8:52 AM on Apr. 8, 2009