What occurs during extension of a joint?

During the extension of a joint, the characteristic that defines this movement is an increase in the joint angle. Extension involves straightening the joint, which causes the two segments of the limb or body part to move away from each other. For example, when you straighten your arm after bending it at the elbow, the angle between the upper arm and forearm increases, resulting in an extended position.

When considering the anatomy and function of joints, extension is a fundamental movement that is crucial for many physical activities, as it allows for the return to a resting or neutral position after flexion. Understanding the mechanics of extension is essential for fitness professionals, as it informs proper exercise technique and the development of effective training programs for clients.