During a limitation assessment, which muscle is most likely overactive in a client demonstrating limited elbow extension?

In the context of a limitation assessment focusing on elbow extension, the biceps brachii, particularly the long head, is identified as the muscle most likely to be overactive. When a client demonstrates limited elbow extension, it often indicates an imbalance in the musculature surrounding the joint.

The biceps brachii is primarily known for its actions in elbow flexion but has attachments that influence shoulder positioning as well. If the biceps brachii is overactive or tight, it can create tension that limits the ability of the triceps brachii to fully extend the elbow. Additionally, an overactive biceps can lead to a synergistic dominance where it compensates for weak or inhibited triceps during movement, resulting in restricted range of motion.

The other muscles mentioned, such as the triceps brachii and the brachioradialis, typically assist in the extension of the elbow or are more neutral in their influence during elbow extension. The flexor carpi radialis is primarily involved in wrist flexion rather than directly influencing elbow extension. Therefore, in cases of limited elbow extension, the overactivity of the biceps brachii is a common contributing factor that would need to be addressed in a corrective exercise program.