Push ups helps promote muscle mass and strenght towards your chest muscles while working out other muscle groups.

This exercise not only works out your chest, but it works out other secondary muscles as well.

This exercise does not only promote muscle growth and strength on your chest muscles, but also your front deltoids, back, abs, and your tricep muscles.

• Begin witht the standard pushup position with your hands beneath your shoulders, slightly more than shoulder-width apart.
  
• Straighten your legs so your body forms a straight line from head to heels.
  
• Lower your upper body until your chest is just off the floor.
  
• Push yourself back down to the original position.