The barbell curl primarily targets your bicep and your forearm muscles. These are the only muscles involved in actively lifting the weight. Several other muscle groups play a role in stabilizing the weight while lifting but are not prime movers. Barbell curls are many trainees’ first step towards beginning weight lifting. The reason for that it’s simple since it’s fun and easy to do. The barbell curl is a great way to get started in training your arms. From there you can add other variations to target the muscle group from different angles.