What are the two main muscles of the elbow joint?

The two main muscles of the elbow joint are indeed the biceps and triceps. The biceps brachii is primarily responsible for the flexion of the elbow, allowing the arm to bend and bring the forearm closer to the shoulder. It also plays a role in supination, which is the action of rotating the forearm so that the palm faces upward.

On the other hand, the triceps brachii is the muscle responsible for extending the elbow, straightening the arm. It is located on the back of the upper arm and is crucial for movements that require pushing or extending the forearm away from the body.

Together, these muscles work in opposition to facilitate the full range of motion at the elbow joint, making them key players in various upper body movements. Understanding the functions and interrelationship of the biceps and triceps is essential for designing effective training programs targeting strength and flexibility in the arms.