Is it true that "weight is lost in the kitchen, not in the gym," or do you need to gear yourself up into beast mode? If you're trying to lose weight but don't love working out–or, alternatively, love a good sweat session but hate cutting back on treats–perhaps you're wondering how much of a role exercise plays in weight loss compared to dieting. Let's explore the complex relationship between calorie intake and calorie burn--plus, whether you should try the “80/20 rule” of dieting and exercise to achieve success on the scale.