The lateral head of the triceps brachii, a powerful arm muscle, is situated on the posterior aspect of the upper arm, contributing to elbow movements.

Origin:
Arising from the posterior surface of the humerus, superior to the radial groove, the lateral head of the triceps brachii has its origin along the upper arm.

Insertion:
The muscle inserts into the olecranon process of the ulna, forming the common tendon shared with the other heads of the triceps brachii.

Function:
The primary function of the lateral head of the triceps brachii is extension at the elbow joint. It works in concert with the other heads of the triceps brachii to straighten the arm. Additionally, it contributes to stability during activities like pushing and lifting, playing a crucial role in various upper limb movements involving the extension of the elbow.

Best Exercises for the Triceps Lateral Head
The lateral head of the triceps is highly active during elbow extension, especially during pushing movements. It contributes significantly to arm strength and definition.

Primary Isolation Exercises
Triceps Pushdown

Supporting Movements
Bar Dips (Pronated Grip)
Overhead Triceps Extension

How to Emphasize the Triceps Lateral Head
👉 Focus on strong elbow extension with controlled movement
👉 Keep the elbows close to the body
👉 Avoid shoulder involvement during pushdowns
👉 Use controlled tempo to maintain tension

Explore Exercise Technique and Execution
Each exercise listed above includes a full breakdown of proper form, muscle involvement, biomechanics, and safety considerations. Select an exercise to learn how to train the triceps effectively.