Why is this better than a standing curl?

The seated position and leg brace eliminate the ability to use momentum, forcing the bicep to handle the entire load in isolation.

How heavy should I lift for this exercise?

Focus on moderate weights that allow for 8 to 12 controlled repetitions with a full range of motion. Form is more important than total weight for this specific isolation move.

Can I do this exercise standing?

While possible, the seated version is preferred because it provides a more stable anchor for the arm, ensuring the bicep is the primary mover.

How to Do Concentration Curls: Form and Benefits

Master the concentration curl with our step-by-step guide. Learn proper form to isolate the biceps, build muscle peaks, and avoid common lifting mistakes.

How to Perform

Sit on the edge of a flat bench with your feet spread wide and your knees bent at ninety degrees.
Grasp a dumbbell in your right hand and place the back of your upper arm against the inside of your right thigh.
Extend your arm fully toward the floor while maintaining a straight spine and a slight forward lean.
Curl the weight upward toward your shoulder by contracting the bicep while keeping the torso and legs completely stationary.
Squeeze the muscle at the top of the movement for one second before slowly lowering the weight back to the starting position.
Complete the weight back to the starting position.
Complete the set on one arm before switching to the left side to ensure equal volume.

Common Mistakes

Using momentum or swinging the torso to lift the weight
Placing the elbow on top of the thigh rather than against the inner side
Shortening the range of motion by not fully extending the arm at the bottom
Curling the wrist excessively toward the forearm during the lift

Muscles Worked

Primary movers

Biceps

Stabilizers

Brachialis
Brachioradialis
Forearms

Related Guides

Air Pushdown — Arms
Alternating Biceps Curls With Dumbbell — Arms
Alternating dumbbell hammer curl — Arms

Biceps · Arms