What joints are used in triceps extensions?

The triceps extensions exercise involves several joints in the upper arm and forearm. The primary joint involved is the elbow joint, where the triceps muscles act to extend (straighten) the arm at the elbow. The joints involved in the triceps extensions exercise are:

Elbow joint (Hinge joint): The elbow joint is a hinge joint formed by the articulation of the humerus (upper arm bone) and the ulna and radius (bones of the forearm). During triceps extensions, the triceps muscles contract to extend the forearm, straightening the arm at the elbow.

Shoulder joint (Ball-and-socket joint): The shoulder joint is a synovial ball-and-socket joint formed by the articulation of the humerus and the shoulder girdle. While not directly involved in the triceps extensions, the shoulder joint provides stability and allows for proper positioning of the arm during the exercise.

Wrist joint (Hinge joint): The wrist joint is a synovial hinge joint formed by the articulation of the forearm bones (radius and ulna) and the carpal bones of the wrist. Although wrist movement is not the primary focus of the triceps extensions exercise, the wrist joint allows for slight flexion and extension of the wrist during the movement.

Overall, the elbow joint is the main joint involved in the triceps extensions exercise. The shoulder and wrist joints provide stability and support during the movement.