Concentration Curls

Learn how to do concentration curls with a clear setup, controlled movement, and a technique you can repeat.

BicepsDumbbell5 technique steps

See the movement
Concentration Curls: matching illustrations comparing the setup and movement positions
01Set your position02Make the movement

How to do concentration curls

  1. Sit down on a flat bench with one dumbbell in front of you between your legs. Your legs should be spread with your knees bent and feet on the floor.
  2. Use your right arm to pick the dumbbell up. Place the back of your right upper arm on the top of your inner right thigh. Rotate the palm of your hand until it is facing forward away from your thigh. Tip: Your arm should be extended and the dumbbell should be above the floor. This will be your starting position.
  3. While holding the upper arm stationary, curl the weights forward while contracting the biceps as you breathe out. Only the forearms should move. Continue the movement until your biceps are fully contracted and the dumbbells are at shoulder level. Tip: At the top of the movement make sure that the little finger of your arm is higher than your thumb. This guarantees a good contraction. Hold the contracted position for a second as you squeeze the biceps.
  4. Slowly begin to bring the dumbbells back to starting position as your breathe in. Caution: Avoid swinging motions at any time.
  5. Repeat for the recommended amount of repetitions. Then repeat the movement with the left arm.
Concentration Curls exercise illustration

Concentration Curls: muscles worked

Primary focus: biceps. Supporting muscles: Forearms.

Better reps before more weight.

Start with a version you can control. Record the same setup and range each time. Add reps or a small load increase when you can repeat the movement without changing the technique.

Plan your next set

Frequently asked questions

How do you do concentration curls?

Sit down on a flat bench with one dumbbell in front of you between your legs. Your legs should be spread with your knees bent and feet on the floor. Use your right arm to pick the dumbbell up. Place the back of your right upper arm on the top of your inner right thigh. Rotate the palm of your hand until it is facing forward away from your thigh. Tip: Your arm should be extended and the dumbbell should be above the floor. This will be your starting position. While holding the upper arm stationary, curl the weights forward while contracting the biceps as you breathe out. Only the forearms should move. Continue the movement until your biceps are fully contracted and the dumbbells are at shoulder level. Tip: At the top of the movement make sure that the little finger of your arm is higher than your thumb. This guarantees a good contraction. Hold the contracted position for a second as you squeeze the biceps.

What muscles does concentration curls work?

Concentration Curls primarily trains the biceps, with the forearms contributing. The exact demand depends on your setup, range, and chosen load.

What is the best technique for concentration curls?

Keep the torso steady and choose a grip you can repeat comfortably. Bend at the elbow rather than swinging the weight with your whole body. Control the return and avoid snapping the elbow straight at the bottom.

What can I do instead of concentration curls?

Related options include Alternate Incline Dumbbell Curl, Alternating Dumbbell Curl, Dumbbell Bicep Curl. These can have different equipment, range, and movement demands. Open the guides below to compare the setups before choosing a replacement.

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