Tricep Muscle


The tricep muscle, the focus of the website. The best bodybuilders are experts in muscle anatomy, hypertrophy and nutrition. Basically, in order to get the most out of your tricep workouts it pays to know what the tricep muscle does and what makes it up. On this page we'll discuss the different parts of the tricep muscle

Let's start by looking the three heads which make up the tricep muscle. The three tricep muscle heads are the long, lateral and medial heads. You can see where they are in the tricep muscle in the diagram below:

Tricep Muscle Anatomy



The long head in the tricep muscle is the largest, and longest, running down the inside of the arm along the humerus. The medial tricep muscle head is smaller and located in the center of the tricep muscle. And the lateral head is located on the outward facing side of the humerus. The lateral head is responsible for that "horseshoe" shape you can see in well developed tricep muscles.

Main functions of the tricep muscle

The tricep muscle has two main jobs. The first job is to extend the arm. All three tricep muscle heads are used in this job. The second job the tricep muscle has is to bring the arm down towards the body (with the help of the Latissimus Dorsi). This role is reserved for the long head of the tricep muscle only.


Your workout - tricep muscles primary and secondary functions

The tricep muscle plays 2 key roles in your weekly workout routine. First, obviously, as a primary muscle. Your primary tricep muscle exercises might include tricep extension, tricep dip or close grip bench press (for more info on tricep workouts see our tricep workouts page). But the tricep muscle also plays a secondary role in all your pushing exercises (bench press, dumbbell press, shoulder press). This is why most bodybuilders train the tricep muscles with the shoulders or chest.