The most important thing to remember here is to burn more calories than being consumed. Intake of fewer calories through dietary changes has been seen to promote weight loss quite effectively. But physical activity is also important in weight control.

So its exercise plus calorie restriction together that will  help to achieve the goal. Exercise will not only help to burn off the excess calories which can't be cut through diet alone but  also acts as a mood booster, strengthens the cardiovascular system and reduces the blood pressure. It helps in maintaining weight loss. Studies show that people who exercise regularly are able to maintain their weight loss for a longer period as compared to those who lose weight by crash dieting, as they are more likely to regain weight quickly, often within six months after they stop dieting.