Known as the “boxers muscle” it is located on the side of the chest by the ribs. It gives us the ability to move the shoulder blade. It is highly important in giving us the ability to lower and raise up our shoulder to use the muscle to move our arm out and away from our body. The muscle is normally very big in boxers, but not in average guys. This is due to the fact that people who work out don’t use the muscle as much as boxers because the structure of a bench press bench does not allow the body “boxers muscle’ to get much of a workout.