No, There Really Isn't a Fat-Burning Zone

When you exercise, the type of energy that is consumed differs as you change the intensity. As you increase your intensity, the contribution from fat decreases, while the contribution from carbohydrates increases. But where the energy comes from is not the most important thing but rather the amount of calories that are consumed which determines weight loss. The higher the intensity, the higher the total number of calories burned per minute. So, there is no "magical" zone that will burn fat just what you already know -- staying active daily and monitoring your food intake -- is the way to lose weight and stay fit.