If you try to lose 15 pounds in five days, you will give up both speed and strength getting to fighting weight. Furthermore, you could cause irreversible damage to your muscles, bones and organs. When the sponge is dry, instead of bending and twisting, the sponge will rip and break. The same is true for your muscles and organs, which will break down and tear if not properly fed and hydrated, and then asked to move in directions not normal to everyday life. First, eat foods known for high energy potential and low fat content.
Carbohydrates are a great source of energy.
Eating these fruits and vegetables helps the body much like a natural laxative, removing waste before it can be stored as fat. Next, you need protein to keep your muscles healthy and strong. You should have some form of protein in your diet each day. Here again, be careful to avoid consuming too much fat. Many good protein foods are also high in fat.