What is the difference between hammer curls and regular bicep curls?

Hammer curls use a neutral grip with palms facing each other, which shifts more emphasis to the brachialis and brachioradialis muscles. Regular bicep curls use a supinated grip with palms facing up, placing greater focus on the biceps brachii.

Should I alternate arms or curl both dumbbells at the same time?

Both methods are effective and the choice depends on your preference and goals. Curling both dumbbells simultaneously is more time-efficient, while alternating allows you to focus on one arm at a time and may help with heavier weights.

Can hammer curls help build forearm size?

Yes, hammer curls effectively target the brachioradialis, which is the largest muscle in the forearm and contributes significantly to forearm size. The neutral grip position keeps this muscle under tension throughout the entire range of motion.

Hammer Curl (Dumbbell)

The hammer curl is a dumbbell biceps exercise performed with a neutral grip, where your palms face each other throughout the movement. It targets the biceps while placing greater emphasis on the brachialis and brachioradialis compared to standard curls.

Muscle group: Biceps
Primary muscles: biceps, forearms
Equipment: Dumbbell

How to do the Hammer Curl (Dumbbell)

Stand with feet shoulder-width apart, holding a dumbbell in each hand with palms facing your torso.
Keep your elbows close to your sides and your upper arms stationary throughout the movement.
Curl the dumbbells upward by bending at the elbows, maintaining the neutral grip position.
Continue lifting until your biceps are fully contracted and the dumbbells are at shoulder level.
Lower the dumbbells back to the starting position under control.
Repeat for the desired number of repetitions, keeping tension on the muscles throughout.

Form tips

Keep your wrists straight and aligned with your forearms rather than allowing them to bend or twist during the curl.
Avoid swinging or using momentum by keeping your torso still and only moving at the elbow joint.
Squeeze your biceps at the top of each rep and control the descent rather than letting gravity drop the weight.

Common mistakes

Rotating the wrists during the movement defeats the purpose of the neutral grip and reduces brachialis engagement.
Letting the elbows drift forward shifts tension away from the biceps and turns the exercise into a front raise hybrid.
Using too much weight forces you to swing your body and reduces the isolation effect on the target muscles.

Sets and reps

For hypertrophy, perform 3 to 4 sets of 8 to 12 reps, while strength work typically uses 3 to 5 sets of 5 to 8 reps with heavier weight.

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Frequently asked questions

What is the difference between hammer curls and regular bicep curls?: Hammer curls use a neutral grip with palms facing each other, which shifts more emphasis to the brachialis and brachioradialis muscles. Regular bicep curls use a supinated grip with palms facing up, placing greater focus on the biceps brachii.
Should I alternate arms or curl both dumbbells at the same time?: Both methods are effective and the choice depends on your preference and goals. Curling both dumbbells simultaneously is more time-efficient, while alternating allows you to focus on one arm at a time and may help with heavier weights.
Can hammer curls help build forearm size?: Yes, hammer curls effectively target the brachioradialis, which is the largest muscle in the forearm and contributes significantly to forearm size. The neutral grip position keeps this muscle under tension throughout the entire range of motion.

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