Is it better to curl both arms at once or alternate?

Both methods are effective, but alternating arms allows for greater focus on individual muscle contraction, while simultaneous curls increase time under tension for the set.

How heavy should the dumbbells be?

Choose a weight that allows you to complete 8 to 12 repetitions with strict form. If your torso is swinging, the weight is too heavy.

Should I keep my palms facing forward the whole time?

A standard curl uses a supinated grip with palms forward, but you can also start with palms facing your thighs and rotate them as you lift to involve more of the forearm.

How to Do Dumbbell Curls: Form, Technique, and Benefits

Master the dumbbell curl with our expert guide. Learn the proper form to target your biceps, avoid common mistakes, and build arm strength effectively.

How to Perform

Stand upright with your feet shoulder-width apart and a dumbbell in each hand, palms facing forward.
Keep your elbows tucked close to your torso and stabilize your shoulders by pulling your blades slightly back.
Curl the weights toward your shoulders while keeping your upper arms stationary.
Squeeze your biceps at the top of the movement for a full second.
Lower the dumbbells back to the starting position in a slow, controlled manner until your arms are fully extended.
Maintain a neutral spine and avoid leaning backward or forward as you move the weight.

Common Mistakes

Using momentum or swinging the torso to lift the weight
Allowing the elbows to drift forward or away from the ribs
Failing to reach full extension at the bottom of the rep
Curling the wrists excessively at the top of the movement

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