Working with weights in the gym forces your muscles to work, but guess what? Working your muscles expends energy, and energy is replenished by your food. Correct nutrition also helps heal muscle injury that often occurs while you are working out. You may not even know you have caused injury to your muscles, but your body knows, and your body needs fuel from food that helps build muscle in order to repair that muscle.

A diet that is low in fat goes without saying with any serious bodybuilder. Protein provides the building blocks to build that muscle. What types of protein are best? Chicken, eggs, steak (with the fat cut off), fish, cheese (especially cottage cheese), and nuts are all great sources of protein.

There is an optimum amount of protein that your body needs for building muscle effectively. Do you know your lean body mass weight? Yes? Great! If you do not know your lean body mass weight, you will need to apply one of the formulas that calculate this.

Carbohydrates are also important foods that build muscle - or rather carbs are important components of foods that build muscle. Choose foods that are high in carbohydrate that are also high in fibre - oatmeal, rice, and potato are all good.

Reducing fat in your diet is also important when considering what foods build muscle mass. I said earlier that protein is essential for the best muscle building nutrition. The problem is that many protein sources are also high in fat. The key, therefore, is to eating plenty of proteins that are low in fat. So cut all the fat off your meat, and the skin off your chicken, and drink low fat milk instead of the full fat variety.

Drinking sufficient water with your meals, between meals, and while you are working out is also very important. Two litres of water a day is what most experts recommend to maintain optimal health. Regular bodybuilding workouts are also essential to maximise the effects of good bodybuilding diets.

Knowing what to eat to build muscle is great, but if you do not combine this great new diet by building muscle mass with weight lifting exercises or other bodybuilding routines, you will not be able to build muscle fast. So you really must do both - eat foods that build muscle, and undertake bodybuilding workouts, and you will end up with a body you will be proud of.