This is one of those questions you'll have to experiment to find out your answer.
When I first got started, I couldn't eat before I worked out. It would make me sick! Now that I've ramped up the intensity and am in the gym for 1-2 hours, I have to have something before I go in. Usually, it's a protein shake, or something small, like a banana or a boiled egg.
There's no right or wrong. You're not going to "burn more fat" exercising at one time over another, with an empty or a full stomach. It's about what works for you, your schedule, and your body.
If you work out most consistently, do it in the morning! If you're fine working out on an empty stomach, you're not going to hurt anything at all. If you find that you need something, it doesn't take much, usually.
Writer, mother, wife, and breadwinner. I love to run, but running doesn't love me, so I'm switching to my low-impact bike.
I'm not pregnant, just fat: My blog. fatnotpregnant.blogspot.com/
| current weight: 187.4