You might have read somewhere—or heard from a friend—that exercising in the morning, on an empty stomach, will burn more calories. But is it true? Well, as you might guess, exercising on an empty stomach is a topic not all experts agree on, and the science on fasted cardio is not totally clear. (Nothing is simple, I know!) However, there’s a lot of evidence that you can use to determine if the approach is right for your body.