Alternate Incline Curl

Diagram of a man performing an incline alternate dumbbell curl, starting with arms extended and ending with arms bent, highlighting the biceps, arm, and shoulder and forearms muscles in orange.

Exercise Description

The Alternating Incline Dumbbell Curl is a biceps isolation exercise performed while seated on an incline bench. The inclined position places the arms behind the torso, creating a greater stretch on the biceps, particularly the long head. Alternating one arm at a time allows for increased focus, improved mind-muscle connection, and balanced development between both arms. This exercise is highly effective for building biceps size, strength, and peak development.

Primary Muscles Worked

  • Biceps Brachii

Secondary Muscles Worked

  • Brachialis

  • Brachioradialis

  • Forearm Flexors

  • Forearm Extensors (Stabilization)

  • Anterior Deltoids (Stabilization)

How to Perform Correctly

Setup

  1. Adjust an incline bench to approximately 45–60 degrees.

  2. Sit back against the bench with a dumbbell in each hand.

  3. Allow your arms to hang fully extended at your sides.

  4. Position your palms facing forward.

  5. Keep your chest lifted and shoulders pulled back.

  6. Maintain contact between your back and the bench throughout the exercise.

Movement

  1. Curl one dumbbell upward by bending your elbow.

  2. Keep your upper arm stationary and slightly behind your torso.

  3. Continue until the dumbbell reaches shoulder height.

  4. Squeeze your biceps at the top position.

  5. Slowly lower the dumbbell back to the starting position under control.

  6. Repeat with the opposite arm.

  7. Continue alternating arms for the desired number of repetitions.

Common Mistakes to Avoid

Swinging the Weight

  • Avoid using momentum to lift the dumbbells.

Moving the Elbows Forward

  • Keep your elbows behind or beside the torso to maintain tension on the biceps.

Using Excessive Weight

  • Heavy dumbbells often reduce range of motion and compromise form.

Lifting the Shoulders

  • Keep your shoulders relaxed and avoid shrugging during the movement.

Incomplete Range of Motion

  • Fully extend the arm at the bottom and complete the curl at the top.

Lifting Both Arms Simultaneously

  • Alternate arms as intended to maximize focus and control.

Lowering Too Quickly

  • Control the eccentric phase to increase muscle activation and reduce injury risk.

Arm Exercises