The deltoid muscle is made up of three major parts, the anterior, lateral and posterior.
These muscles when developed give the broad shoulder look but all three muscles need to be developed for optimum results which involve different exercises.
LOCATION OF THE DELTOIDS
The deltoids are located at the shoulder. The anterior is at the front of the shoulder, the lateral is at the outside of the shoulder and the posterior is at the back of the shoulder. This muscle should not be neglected as the deltoids should be worked equally for balance of development and correct posture.
FUNCTION OF THE DELTOID MUSCLE
The deltoid muscle is responsible for arm rotation and for carrying things upwards and outwards away from the body, also preventing the arm from dislocation or injury of the humerus bone.