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The biceps curl is a fundamental exercise targeting the biceps muscles, the muscles on the front of your upper arm. No other muscles are directly involved in a biceps curl, although several muscles assist during the movement.our biceps muscle contracts both concentrically and eccentrically during the biceps curl. When you curl the weight up, the biceps muscle creates enough force to overcome the external resistance. During this phase of concentric contraction, the muscle fibers shorten, pulling at the elbow joint and lifting your forearm.
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. Also, when you use dumbbells, it is best you do the biceps curls unilaterally, meaning one side at a time. By doing so, you can focus on one side at a time and better stimulate the muscles.