It's easy to get into a mind-set of eating to fuel your workouts. I eat before the workout so I won't flag during the workout, then eat after the workout to refill my muscles with spent glycogen. With time I've become more efficient. Compared to twenty years ago, I don't think I'm burning nearly as many calories as I used to when working out. So for me the trick will be eating even less, not more, when working out.