Hammer curls primarily target the muscles of the upper arm, specifically the brachialis and brachioradialis, along with the biceps brachii. Here's a breakdown of the muscles worked during hammer curls:
Brachialis: The brachialis is a muscle located underneath the biceps brachii, attaching to the lower part of the humerus bone and the ulna in the forearm. It plays a significant role in elbow flexion and is particularly activated during hammer curls due to the neutral grip position.
Brachioradialis: The brachioradialis is a forearm muscle that runs along the forearm and helps to flex the elbow joint. It assists in forearm pronation and supination and is also engaged during hammer curls, especially with the neutral grip position.
Biceps Brachii: Although the biceps brachii is not the primary target of hammer curls, it is still involved in the movement to a certain extent. The long head of the biceps brachii is activated to a lesser degree compared to traditional biceps curls due to the neutral grip position, but it still contributes to elbow flexion.
In summary, hammer curls are an effective exercise for targeting the brachialis, brachioradialis, and biceps brachii muscles. They provide a unique stimulus compared to traditional biceps curls due to the neutral grip position, making them a valuable addition to a comprehensive arm training routine.
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