As previously mentioned, avoid refined bread products. Another word that you must look for is called "bleached".
You want to eat whole wheat bread in moderation but also in relation to your training. For instance, wheat bread provides you with a longer lasting energy source and if you don't train to burn off this energy then it will transform to fat.
Eating wheat bread while participating in a strenuous workout routine will help you out by providing your body with energy. So eat it in moderation but in relation to your workout regimen.