Bigger arms!

Everyone wants bigger arms, but there’s no such thing as a magical workout you can do to get them.


Let´s see the most important ones:

The Coracobrachialis is a long, slender muscle of the shoulder joint.

The contraction of the coracobrachialis leads to two movements at the shoulder joint. On one hand, it bends the arm (flexion), and on the other hand, it pulls the arm towards the trunk (adduction). To a smaller extent, it also turns the humerus inwards (inward rotation). Another important function is the stabilization of the humeral head within the shoulder joint, especially when the arm is hanging freely straight down.

The overuse of the coracobrachialis can lead to stiffening of the muscle. Common causes of injury include chest workouts or activities that require pressing the arm very tight towards the body, e.g. work on the rings in gymnastics. Symptoms of overuse or injury: pain in the arm and shoulder, radiating down to the back of the hand.



Coracoid process of the scapula.


The medial shaft of the humerus at about its middle.

The Biceps brachii, commonly known as the biceps, is a two-headed muscle that lies on the upper arm between the shoulder and the elbow. The Biceps muscle is actually two separate bundles of muscles (heads). The two heads of the Biceps vary in length and as a result, are called the Short and the Long Biceps heads.

The biceps works across three joints.

Proximal radioulnar joint (upper forearm): It functions primarily as a powerful supinator of the forearm (turns the palm upwards). This action, which is aided by the supinator muscle, requires the elbow to be at least partially flexed.

Humeroulnar joint (elbow): It also functions as an important flexor of the forearm, particularly when the forearm is supinated. This action is performed when lifting an object, such as a bag of groceries. When the forearm is in pronation (the palm faces the ground), the brachialis, brachioradialis, and supinator function to flex the forearm, with minimal contribution from the biceps brachii.

Glenohumeral joint (shoulder): TIt weakly assists in forward flexion of the shoulder joint (bringing the arm forward and upwards). It also contributes to abduction (bringing the arm out to the side) when the arm is externally (or laterally) rotated. The short head also assists with horizontal adduction (bringing the arm across the body) when the arm is internally (or medially) rotated. Finally, the short head, due to its attachment to the scapula (or shoulder blade), assists with stabilization of the shoulder joint when a heavy weight is carried in the arm.

Biceps brachii


  1. Long head- supraglenoid tubercle and glenohumeral labrum.
  2. Short head- tip of the coracoid process of the scapula.


  1. Radial tuberosity.
  2. Bicipital aponeurosis.

The brachialis is a muscle in the upper arm that flexes the elbow joint. It lies deeper than the biceps brachii, and is a synergist that assists the biceps brachii in flexing at the elbow.

Its primary action is to flex the forearm muscles at the elbow. Due to its high contractile strength, the branchialis makes many arm and elbow movements possible. Such movements are important for the activities of daily life. Because movements involving the arms and elbows are almost always continuous, injuries to the brachialis muscle are quite common.



  1. Lower 1/2 of anterior humerus.
  2. Both intermuscular septa.


  1. Ulnar tuberosity.
  2. Coronoid process of ulna slightly.

The Triceps Brachii muscles are located on the back of the humerus and more commonly referred to as the triceps. The triceps muscles have three muscle heads: Lateral, Medial and Long head.

Primarily responsible for the extension of the elbow joint (straightening of the arm). It can also fixate the elbow joint when the forearm and hand are used for fine movements, e.g., when writing. The lateral head is used for movements requiring occasional high-intensity force, while the medial fascicle enables more precise, low-force movements.

With its origin on the scapula, the long head also acts on the shoulder joint and is also involved in retroversion and adduction of the arm.



  1. Long head: infraglenoid tubercle of the scapula.
  2. Lateral head: upper half of the posterior surface of the shaft of the humerus, and the upper part of the lateral intermuscular septum.
  3. Medial head: posterior shaft of humerus, distal to radial groove and both the medial and lateral intermuscular septum (deep to the long & lateral heads).


  1. Posterior surface of the olecranon process of the ulna.
  2. Deep fascia of the antebrachium.

The anconeus muscle (or anconaeus/anconæus) is a small muscle on the posterior aspect of the elbow joint.

It assists in extension of the elbow, where the triceps brachii is the principal agonist, and supports the elbow in full extension. It also prevents the elbow joint capsule being pinched in the olecranon fossa during extension of the elbow. Anconeus also abducts the ulna and stabilizes the elbow joint. Anconeus serves to make minute movements with the radius on the ulna. In making slight abduction of the ulna, it allows any finger to be used as a axis of rotation of the forearm.



Posterior surface of the lateral epicondyle of the humerus.


Lateral aspect of olecranon extending to the lateral part of ulnar body.

34 thoughts on “Bigger arms!”

  1. Even if I was not running I lift heavy I warm up and do barbell curls with 135 and my arms do not get big, I only lift heavy. My strength is deceptive to a lot of people. . I jump in with huge guys and do more weight than they can on almost any movement. I just get stronger. I don’t mind. It is better when my waist is smaller to show the muscles easier as I have a decent sized chest with definition as well as lats and delts and my arms take me 3 workouts to show definition. Legs I always have, lol.

    Liked by 1 person

      1. For some odd reason my warmup weights have not changed in 27 years. My maxes are close to the same. As far as tendons or similar my achilles, both hate me running. I have to run on a short stride. Once I open up, put on spikes a few times a week they almost double in size and are bumpy. So I have to get in shape quick, then barely train and find races. BC when they get like that no pt, orthotics or even studies have worked. KT tape helped a tad. I have had drs say I would need surgery to shorten them. Then I would surely snap them. But lifting I can do and I run, just I have moved away from the city which has the best track in the world and it’s great to train on. 🙂

        Liked by 1 person

      2. I know it well. There is also The Rocky saying of how many minutes you have to train to fight one fight. Then there is one that runners know. In order to run a 100 meter dash you have to do 10000 of them and added are 10000 starts and accelerations. But when you have the condition do not let it go and it is easier to attain. 🙂

        Liked by 1 person

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