Question

Identify the action that occurs at the elbow joint when lifting a weight during a bicep curl. What are the two primary muscles responsible for this action?

Answer 1

The bicep curl is a fundamental exercise targeting the biceps muscles which are on the front of the upper arm. No other muscles are directly involved in a biceps curl, although several muscles assist during the movement. During the exercise the biceps muscle shortens then lengthens to control the movement of weight.

A muscle contracts when the muscle fibers create tension against an internal resistance. Biceps muscle contracts both concentrically and eccentrically during the biceps curl.

Brachialis and Brachioradialis two muscles in your arm, assist the biceps in bending your elbows against resistance.