A treadmill is designed for running, walking and jogging. All these exercises obviously help to lose weight. From that point of view, a treadmill helps to lose weight dramatically. This unit can encourage you to do more physical activity. Because of it, your calories are going to burn which helps to lose weight. But, buying and using a treadmill is not going to help you to lose weight suddenly. You have to keep running more and more to get the best result.