Hammer Curls: Learn Proper Form to Maximize Your Results

A hammer curl is a variation of the biceps curl and targets muscles in the upper and lower arm. While this exercise is almost always performed with a dumbbell, you can do it with cables or bands. Hammer curls are a great addition to your upper-body strength routine.

How to Do Hammer Curls

Stand with your legs straight (but not stiff or locked) and knees aligned under the hips. Your arms are at your side with a dumbbell in each hand, the weights resting next to the outer thigh. Your palms are facing the thighs, thumbs facing forward, and shoulders relaxed.Hammer Curls: Learn Proper Form to Maximize Your Results

1. Bend at the elbow, lifting the lower arms to pull the weights toward the shoulders. Your upper arms are stationary and the wrists are in line with the forearms.
2. Hold for one second at the top of the movement. Your thumbs will be close to the shoulders and palms facing in, toward the midline of your body.
3. Lower the weights to return to the starting position.

Engage your abdominals throughout hammer curls to prevent movement in the lower back as you lift and lower weights.

Benefits of Hammer Curls

Hammer curls work the biceps brachii, considered a “vanity muscle” because it is easily visible on the front of your body.1 People looking to get a muscular appearance often target the biceps for a more athletic look.

Because it is in charge of bending the elbow joint, the biceps brachii is an elbow flexor in the body. Moreover, rotating (supinately) the forearm is beneficial.Hammer Curls: Learn Proper Form to Maximize Your Results

In everyday movements, strong biceps help you lift and carry heavy objects.Because it allows the elbow joint to bend, the biceps brachii is an elbow flexor in the human body. Supining, or rotating, the forearm, is also beneficial.

One exercise that can help strengthen your biceps muscles and give them more shape and strength is the hammer curl.It could also aid in improving grip strength and wrist stability if you incorporate it into your workout routine.

Other Variations of Hammer Curls

You can modify hammer curls to better align with your fitness level and goals.

Alternating Hammer Curls

If you try hammer curls and find they’re too challenging to maintain proper form, try alternating. Instead of lifting both arms simultaneously, lift the right arm and lower, then lift the left and lower. Continue to alternate sides.Hammer Curls: Learn Proper Form to Maximize Your Results

Incline Hammer Curls

Another variation is to use a seated incline bench to perform hammer curls. When seated, the starting position places the arms behind your hips and helps to reduce shoulder involvement. You may be able to improve grip strength and wrist stability by including it into your exercise regimen.

We’ve tried, tested, and reviewed the best weight benches. If you’re in the market for a weight bench, explore which option may be best for you.

Preacher Hammer Curls

Some fitness enthusiasts practice hammer curls on a preacher bench. With the padded, tilted armrest of a preacher bench, you can isolate your upper arm and lift heavier weights, effectively targeting your biceps.

Adjust the padded armrest so its top is just touching your armpits. Rest your upper arms against the padding, extend your elbows, and hold the weights so your palms face each other. Lift the weights to your shoulders, then lower them back down.Hammer Curls: Learn Proper Form to Maximize Your Results

Hammer Curls Power Squat

Make hammer curls more challenging by adding a squat. This helps you work your legs and glutes while also working your arms. After lifting the weights to the shoulders, drop into a squat position. Hold briefly, stand back up, and return the weights to your side.

Hammer Curls: Common Mistakes

Avoid these common errors to keep hammer curls safe while maximizing their effectiveness.

Using Momentum

Using momentum decreases your ability to build strength during hammer curls. Swinging motions may also put you at higher risk for injury because you lose control when momentum takes over.Hammer Curls: Learn Proper Form to Maximize Your Results

If you begin hammer curls by leaning slightly forward and bringing the weights behind your hips, you can determine if you are using momentum. You can wind up for the workload with your body in this position.

Using momentum is often a sign that you are lifting too much weight. If you notice yourself winding up before each repetition, decrease the weight and focus on form.

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Curling Too Fast

Hammer curls employ a relatively small range of motion, so it’s easy to rush through this exercise and use quick movements, especially during the lowering phase.Hammer Curls: Learn Proper Form to Maximize Your Results

Taking your time on the way up and down allows you to control the movements and focus on form. Slowing your movements also adds more challenge because you must engage your muscles for a longer time.

Curling too fast can also be a sign that you’re not lifting enough weight. Both the concentric or shortening phase (when you lift the weight) and the eccentric or lengthening phase (when you lower the weight) should last about two breaths.

Floating Elbows

It’s easy to allow the elbows to float away from the body during hammer curls. While this engages other muscles in the lift, such as the deltoids (shoulders), the more you engage other muscles the less you target the biceps.Hammer Curls: Learn Proper Form to Maximize Your Results

Keep your elbows in a stable, fixed position and concentrate on moving only the lower arm during hammer curls. If you can’t lift weight without moving your elbow, the weight is too heavy.Hammer Curls: Learn Proper Form to Maximize Your Results

Safety and Precautions

While hammer curls are appropriate for most exercisers, those with lower arm injuries (such as carpal tunnel syndrome) may need an alternate exercise or modification.

Tension in the biceps indicates that the movement is working and effectively targeting your upper-arm muscles. However, stop if you feel pain when performing hammer curls.

When first starting, try two sets of 7 to 10 repetitions each. As you get stronger and more flexible, add repetitions first. Then add more weight.Hammer Curls: Learn Proper Form to Maximize Your Results

If you are new to this or any weight training exercise, try the movements without weight (or with very little weight) to get comfortable with the movement. You can also work with a fitness trainer to get tips and advice.Hammer Curls: Learn Proper Form to Maximize Your Results