8/14/2023 0 Comments Cable crossover chest![]() It’s also involved in movements such as horizontal adduction (as if you were bear-hugging someone) and internal rotation of the humerus. The sternocostal head, on the other hand, brings the arm down from a forward or flexed position. It also adducts the humerus - which means it brings the arm inward toward the body’s midline - and assists in internal rotation of the same bone. The clavicular head flexes the humerus, or upper arm bone, by raising your arm in front of you. These are antagonistic to each other, which means that as one contracts, the other relaxes. The pectoralis major is a unique muscle because it has two heads - the clavicular head and the sternocostal head. It is a smaller accessory muscle primarily involved in respiration (breathing) ( 2). There are three primary muscles that make up the chest:Ī lesser-known muscle in the chest is called the subclavius. This is when a person has a narrower waist and broader chest.īut gender-specific beauty standards aside, everyone can benefit from strengthening the chest muscles - whether your goal is to have sculpted pecs or simply to be able to play Twister with your kids on the living room floor. Powerlifters rely on them for the bench press to score the greatest lift.īut these muscles are also incredibly important from a functional standpoint because they support the movement of the arms.Ī number of studies examining perceived attractiveness found that a low waist-to-chest ratio was rated as the most attractive physical feature on males ( 1). They are also the primary muscles referenced when debating upper body strength (“How much can you bench, bro?”).įor body builders and those interested in general muscular aesthetics, the chest muscles are the defining part of muscle mass. They are involved in actions such as squeezing a set of loppers to cut a tree branch and pushing a door open. ![]() The chest muscles could be considered a defining part of strength anatomy. ![]() Performing chest exercises, such as push-ups and bench presses, can help increase the strength and definition of your chest muscles.
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