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Pectoralis Major: The pectoralis major makes up most of your chest muscle mass. It is large and fan shaped, and is composed of a sternocostal head and a clavicular head.
Pectoralis Minor: The pectoralis minor lies underneath the pectoralis major. Its job is to help pull the shoulder forward and down.
Serratus Anterior: Located at the side of the chest wall, you'll notice the serratus anterior in action when you lift weights overheadhttps://youtu.be/NsEbXsTwas8?si=k-4yarIukuGDWA9-
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