The Deltoid Muscle

The deltoid muscle is the round muscle that encapsulates your shoulder. There are three heads, or three origins points, of the deltoid muscle: anterior, middle and posterior. Each of these heads plays a different in moving your shoulder.


Anterior (front): Responsible for raising your arms straight out in front of you (flexion)

Middle: allows you to bring your arms out directly to the side (abduction)

Posterior: when hands are out in front of you with arms parallel to the ground, this muscle is responsible for spreading you arms apart (horizontal abduction)

Exercises To Grow Middle Delt’s:

https://www.youtube.com/watch?v=XGqH9EAMmUc Skip to 20:45


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