Losing weight without exercise is one of the most widely used statements in the weight loss industry. Is diet better than exercise? Is it possible to lose weight and keep it off without any kind of activity at all? Well, the answer to that is NO. Exercising is a very important factor and dieting alone will not help you lose weight. To lose weight you need to have caloric deficit. There are two ways how you can do that. One is to decrease the amount of calories you consume (eat less). The other is to increase the amount of calories you burn (exercise more).