Push-ups are one of the most commonly used exercise in fitness today. There is truly power behind a push up. Done on a regular basis, they can help boost metabolism because it helps to improve muscle which in turn burns calories much faster. They are a great way to decrease fat stores in the body because they utilize all the muscles in the upper body and back. Incorporate them in between weight training sets and watch how beautifully your upper body develops, especially if the diet is low in fat.