Deltoids, also known as deltoid muscles or simply delts, are a group of three muscles located in the shoulders and upper arms. The term "deltoid" is derived from the Greek word "delta," which refers to the triangular shape of these muscles. The deltoids are considered an integral part of the shoulder joint and play a crucial role in various shoulder movements.
The deltoid muscles consist of three distinct parts: the anterior deltoid, the lateral deltoid, and the posterior deltoid. The anterior deltoid is located at the front of the shoulder, the lateral deltoid runs along the outer side, and the posterior deltoid is situated at the back. These muscles work together to enable a wide range of shoulder motions, including flexion, extension, abduction, adduction, internal rotation, and external rotation.
The deltoids are involved in many daily activities and exercises, such as lifting, pushing, and pulling objects, as well as various upper body workouts like shoulder presses, lateral raises, and upright rows. Building and strengthening the deltoids can help improve upper body strength, enhance athletic performance, and contribute to a balanced and aesthetic physique.
In summary, the deltoids are a group of three shoulder and upper arm muscles that enable a variety of shoulder movements. They consist of the anterior, lateral, and posterior deltoids and play an important role in the functionality and appearance of the shoulders.
