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What muscles do bicep curls work?

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At the start of the curl, when the arm is fairly straight (180° angle at the elbow), the brachialis (deep muscle underneath the biceps) and brachioradialis (large forearm muscle on thumb side of arm) do most of the work lifting the weight up until the halfway point of the exercise, when the elbow angle is about 90°. read more

Flexor muscles serve to decrease the angle between a pair of bones. The flexor muscles used in a biceps curl exercise connect your elbow to your hand, running down your forearm. read more

The biceps curl is an exercise for the elbow flexors, which comprise the biceps brachii, brachialis and brachioradialis. You can emphasize each of these muscles by using a variety of grips. It is best to do biceps curls using dumbbells to ensure the elbow flexors of each arm are being worked to the same extent. read more

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