If you're a morning runner, it's tempting to skip breakfast because you want to maximize your sleep time and not have to wake up early enough to give yourself time to digest before running. Even runners who don't run in the morning sometimes make the mistake of skipping breakfast because they don't have time, they don't like breakfast foods, or they're trying to lose weight.
Why is skipping breakfast a big nutrition mistake? If you wait until lunch to eat, your body assumes you're fasting and responds by slowing your metabolism. So skipping breakfast won't help your weight loss efforts. You'll just get hungrier, which increases your temptation to eat everything in sight. A nutritious breakfast gets you fueled for the day and helps prevent you from binging later on.
Eating breakfast means you'll have a better chance of burning off those calories because you're consuming them early in the day. And a nutritious breakfast will actually help you burn more calories during your runs because you'll be properly fueled to run stronger.
If you find you just don't have time to eat breakfast because you're rushing around in the morning, try some of these ideas for eating a healthy breakfast at the office.