When you exercise after an overnight fast, your body generally relies more heavily on stored fat for fuel during the workout. Research comparing fasted and fed aerobic exercise has consistently found greater fat oxidation during fasted exercise. In plain English, you are burning a greater percentage of fat for energy while you are exercising. But here is where things get interesting. Burning more fat during a workout does not automatically mean you will lose more body fat

Here's something that might surprise you. Most toddlers between one and three years old need roughly 1,000 to 1,400 calories each day to support their rapid growth and development. That means an adult eating only 800 calories is actually consuming less energy than many toddlers. Let that sink in for a moment.