"Getting your brachialis and your brachioradialis to be bigger doesn ... curls—does not contribute to supination like the biceps brachii do. "It does contribute to elbow flexion, but it doesn ...

To fully develop your arms, you need to target the entire muscle group: the long and short heads of the biceps brachii, the brachialis (your elbow flexor), and the brachioradialis (forearm muscles).

4. Bicep Curls: Bicep curls are done with dumbbells. They mainly target the biceps brachii, brachialis and brachioradialis muscles. 5. Lat Pull-Down: The lat pull-down is an exercise you can do ...

“The biceps ... brachialis muscle and your forearm much more into play, which is very effective if increasing the overall ‘thickness’ of your arm is your goal.” They also target the ...