Both exorcise and nutrition should be balanced as a team to optimize the muscular growth process. Bodybuilders must be prepared to meet the special demands they make on their bodies. This requires nutritious food and sound eating habits. The basics of nutritious food and sound eating habits begin with a description of the essential nutrients.
Some fifty different nutrients are found in foods, but they can be grouped under six main headings: proteins, minerals, vitamins, fats, carbohydrates, and water. Proteins, fats and carbohydrates are the energy- supplying nutrients. Energy from food is typically measured as heat and expressed as calories. Fat contains over twice as many calories as an equal amount of protein and carbohydrate.
1 gram of fat = 9 calories
1 gram of protein = 4 calories
1 gram of carbohydrate = 4 calories
Although most foods contain more than one nutrient, no single food contains all the nutrients In the amounts the body needs. That Is why you need to eat a variety of foods each day.