Barb is right. When I use to run, I had to eat something before I went out and did my 6 mile jog. Otherwise, I'd get dizzy and not have any energy to do the run. A small egg sandwhich my favorite. Most of the time, I just use two egg whites and cooked it with cooking spray to cut out the calories. I put jelly on my toast in place of butter.
Something light -- maybe a yogurt, small sandwich, apple, hard boiled egg, etc.