1. Supinated Grip (Palms Up): • Primary Muscle Targeted: Biceps Brachii • Explanation: This grip most effectively engages the biceps brachi, emphasizing both the long and short heads of the biceps. 2. Neutral Grip (Hammer Grip): • Primary Muscle Targeted: Brachialis and Brachioradialis • Explanation: This grip shifts focus away from the biceps brachi and more towards the brachialis a muscle that lies underneath the biceps) and the brachioradialis (a forearm muscle). It still engages the biceps, but to a lesser extent. 3. Pronated Grip (Palms Down): • Primary Muscle Targeted: Brachioradialis and Brachialis • Explanation: This grip further reduces biceps brachii activation and places greater emphasis on the brachioradialis and brachialis. The biceps are still involved but are not the primary muscle doing the work.
