The starting and ending points and functions of the deltoid muscles

We have also introduced a lot of shoulder training before Methods and techniques of the deltoid muscle

Today we will introduce you to the deltoid muscle from an anatomical point of view, and understand its shape, position and function. This will better help you understand the deltoid muscle and better Get training!

Deltoids

Position: Front, outside, and rear of the shoulder joint

Shape: Inverted triangle, divided into three bundles

Origin >: Lateral half of clavicle, acromion, scapular spine

Insertion point: Deltoid tuberosity of humeral body

Function: The function of the deltoid muscle is mainly responsible for the movement of the shoulder joint (glenohumeral joint). Because of the different directions and starting and ending points of the muscle fibers, the functions of the anterior, middle and posterior deltoid muscles will also be somewhat different

The anterior deltoid muscle It can perform shoulder joint flexion, internal rotation, horizontal adduction, and abduction movements

The main function of the middle deltoid muscle is shoulder joint abduction

The posterior deltoid muscle can perform shoulder joint movement Extension, external rotation, abduction, horizontal abduction

We can see that the front, middle and rear deltoid muscles can perform shoulder abduction movements, while the middle deltoid muscle is only responsible for shoulder abduction, and the front deltoid muscle is responsible for shoulder abduction. It is the antagonist muscle that has the opposite function of the posterior bundle

There are many ways to train the deltoid muscles

The front deltoid is in the incline bench press, narrow-grip press, The rear beam is most involved in movements such as parallel bars, front raises, dumbbell chest presses, etc.

The rear beam is more involved in pull-ups, various rowing, pull-downs, reverse flyes, and straight-arm push-downs. Many

The middle beam is most involved in shoulder abduction movements. For example, lateral raises

The best exercise for training the deltoid muscles is the vertical shoulder press, with the shoulders doing abduction movements. , can train the entire deltoid muscle at the same time