A well balanced diet will be one of the primary building blocks behind all other aspects of your physical health. Fats will serve many functions, but one major function is lubrication of your joints. Another is assisting to carry nutrients through the blood. Carbohydrates are your primary energy source and will give you the energy to perform quick powerful tasks. Proteins are the building blocks of your body, which is always breaking down and rebuilding. Everything in your body is either made of, or made from protein. This means it is essential to keep a steady flow of materials going in to allow your body to rebuild instead of deteriorate.