Chest muscles: Referring to the chest musculature most people mainly think of the musculus pectoralis major, the “large chest muscle”. Indeed, this part of the muscle is responsible for all essential movements of this group. But there also is a small chest muscle, the pectoralis minor, that is hidden under its big brother.
The chest muscles – importance and function
The pectoralis major not just covers the pectoralis minor but almost the entire thorax. It consists of three parts: an upper, a middle, and a lower part. The chest muscles are responsible for major parts of the motion of the shoulder joint. It pulls the arm towards and in front of the body, rotates the arm inwards, leads the arm to the front, and lowers the arm from raised position. Additionally, the pectoralis minor pulls the shoulder towards the lower front obliquely and supports the breathing when the arms are in resting position. Also esthetic aspects can be attached to the chest musculature.
The chest muscles – training and daily life
When the upper arm is being moved backwards, the head of the bone of the upper arm will be squeezed against the situated shoulder ligament and tissue. Large strains can overstretch or even damage these soft shoulder parts. Especially, when working out bench or chest press, dips, and flys. So be careful when you work out your chest muscles.
Learn more about the muscles of the human body.
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