You're trying to lose weight, so you plan to hit the gym at lunch, but you haven't had time to eat. Don't go! Researchers say you should NEVER work out on an empty stomach. When you do, it puts your body into survival mode, and your body adjusts its metabolism to compensate for any loss of energy. That means you burn fewer calories.
Instead, grab something small, even if it's just a banana...then hit the gym!