Upper Arms Exercise · Dumbbell

Expand

Dumbbell One Arm Hammer Preacher Curl

Combining a neutral hammer grip with a preacher bench and one working arm creates one of the strictest possible isolation setups for the brachialis and biceps — no swing, no other arm to compensate, no way to cheat the stretch at the bottom. It's a finishing exercise more than a mass builder, meant to fully fatigue the arm with light-to-moderate weight. Expect the working arm to feel it well before the set ends.

Go to the movement steps

Also known as: Db One Arm Hammer Preacher Curl, Dumbell One Arm Hammer Preacher Curl

Category

Upper Arms

Equipment

Dumbbell

Target

Biceps

Share Embed & Cite

Exercise reference published by PlanWorkouts; see our editorial standards.

How to Do the Dumbbell One Arm Hammer Preacher Curl

1. Sit at a preacher bench with a dumbbell in one hand and your upper arm resting on the pad.
2. Grip the dumbbell with a neutral grip, palm facing your body.
3. Without moving your upper arm, exhale and curl the dumbbell up toward your shoulder.
4. Hold briefly at the top, squeezing your biceps.
5. Inhale and lower the dumbbell back down under control.
6. Continue for the target number of reps, then switch arms.

Technique & Form Tips

Perform flexion at the elbow while keeping your setup steady and supported. Maintain the specific elbow placement demonstrated for your chosen variation, such as preacher, incline, or hammer curl, to ensure consistent mechanical load through the arc.

Common Mistakes to Avoid

• Using hip momentum: Keep your torso stable to prevent swinging the load upward with your lower body.
• Drifting elbows: Maintain the elbow position relative to your body as defined by your specific curl variant.
• Lack of eccentric control: Lower the weight under control rather than letting it fall.

How to Breathe During This Exercise

Breathe steadily throughout the movement, ideally exhaling during the contraction phase.

Comfort and Control

Choose a load and range you can control. Stop if the movement causes pain. If discomfort persists, stop and ask a qualified professional about an appropriate exercise and range.

General guidance: Mayo Clinic on weight-training technique. Follow the specific movement steps above for this variation.

Muscles Worked

The Dumbbell One Arm Hammer Preacher Curl mainly targets your Biceps, with your Forearms helping support the movement.

More Upper Arms Exercises

Assisted Standing Triceps Extension (with Towel) Assisted · Triceps Assisted Triceps Dip (kneeling) Leverage Machine · Triceps Band Alternating Biceps Curl Band · Biceps Band Close-Grip Push-Up Band · Triceps Band Concentration Curl Band · Biceps Band One Arm Overhead Biceps Curl Band · Biceps

More Biceps Exercises

Barbell Alternate Biceps Curl Barbell · Biceps Barbell Biceps Curl (with Arm Blaster) Barbell · Biceps Barbell Curl Barbell · Biceps Barbell Drag Curl Barbell · Biceps Barbell Lying Preacher Curl Barbell · Biceps Barbell Preacher Curl Barbell · Biceps

Equipment Alternatives

Don't have dumbbell? These target the same biceps with different equipment.

Biceps Leg Concentration Curl Body Weight · Biceps Barbell Alternate Biceps Curl Barbell · Biceps Cable Close Grip Curl Cable · Biceps EZ Bar Seated Close Grip Concentration Curl EZ Barbell · Biceps

FAQ

What muscles does the Dumbbell One Arm Hammer Preacher Curl work?

The Dumbbell One Arm Hammer Preacher Curl mainly works your biceps. Your forearms also works to help support and steady your body. Using good, smooth form makes sure you work the right muscles and avoid unnecessary strain on your joints.

What equipment do I need for the Dumbbell One Arm Hammer Preacher Curl?

You do the Dumbbell One Arm Hammer Preacher Curl with a dumbbell. Make sure your equipment is set up safely before starting. If you work out at home or have limited gear, check out our alternative exercises below.

What form mistake should I watch for on the Dumbbell One Arm Hammer Preacher Curl?

One mistake to watch for is using hip momentum: Keep your torso stable to prevent swinging the load upward with your lower body.. Use a comfortable range and a controlled return; reduce the load if you cannot maintain the demonstrated setup.

How many sets and reps should I perform on the Dumbbell One Arm Hammer Preacher Curl?

To tone and grow muscle, do 3 to 4 sets of 10 to 15 smooth reps with 60 seconds of rest, focusing on a full stretch and squeezing the muscle at the top of each rep.

What's a good alternative to the Dumbbell One Arm Hammer Preacher Curl?

The Biceps Leg Concentration Curl trains your biceps with body weight and a similar movement pattern. Review its form guide before substituting it, since setup and range of motion can differ.