In my opinion, both exercise and healthy diet is important to lose your weight without compromising with your health. Actually, the basic technique, logic or way is to burn more calories that you are taking in a day. In other words, decrease the intake of calories that you can burn in a day by exercising. A balanced diet restricts the intake of calories and carbohydrates in this process, and also provide essential nutrient like proteins, vitamins, minerals and Amino acids to our body. Whereas, by exercising, you can burn the excess calories from your body, which will eventually result in loss of fat from your body.