Upper Arms Exercise · Dumbbell
Dumbbell Hammer Curls (with Arm Blaster)
Also known as: Db Hammer Curls (With Arm Blaster), Dumbell Hammer Curls (With Arm Blaster)
- Category
- Upper Arms
- Equipment
- Dumbbell
- Target
- Biceps
Form and technique verified by certified strength coaches; see our editorial standards.
The Dumbbell Hammer Curls (with Arm Blaster) is a focused upper arms exercise designed to train your Biceps.
Single-joint elbow flexion isolated in the sagittal plane. Focuses mechanical load on biceps brachii (long and short heads) and brachialis with minimal torso swinging. Doing this with controlled form helps you build muscle safely while protecting your joints.
Quick Exercise Facts
Target Muscle Activation
Locking the elbows against an arm blaster while doing hammer curls removes any forward drift, so the brachialis and forearms — the muscles a neutral grip already emphasizes — take on even more of the load without shoulder momentum sneaking in. It's a strict way to finish an arm day once regular hammer curls stop feeling challenging. Expect to use less weight than the unrestricted version.
How to Do the Dumbbell Hammer Curls (with Arm Blaster)
- Stand tall with a dumbbell in each hand, palms turned toward your torso.
- Keep your elbows tucked to your sides and rotate your palms until they face forward.
- This is your starting position.
- Keeping your upper arm still, exhale and curl the dumbbells as your biceps contract.
- Keep raising the weights until your biceps are fully contracted and the dumbbells reach shoulder height.
- Pause briefly in the contracted position, squeezing your biceps.
- Inhale and slowly lower the dumbbells back to the starting position.
- Repeat for your planned rep target, maintaining clean technique and steady breathing on every repetition.
Recommended Sets & Reps by Goal
Moderate weight · 60s rest
Lighter weight · 30–45s rest
Lower slowly for 3 seconds · 60s rest
Technique & Form Tips
Single-joint elbow flexion isolated in the sagittal plane. Focuses mechanical load on biceps brachii (long and short heads) and brachialis with minimal torso swinging.
Common Mistakes to Avoid
- Swinging Hips & Lower Back: Using momentum from the hips to swing the weight upward eliminates the initial concentric overload on the biceps.
- Drifting Elbows Forward: Allowing elbows to travel forward past the ribs recruits the anterior deltoids and takes tension off the biceps apex.
- Dropping the Eccentric Phase: Letting the weight fall quickly without resistance wastes 50% of the muscle-building stimulus from eccentric microtrauma.
How to Breathe During This Exercise
Inhale on controlled lowering (2-3s eccentric); exhale on elbow contraction to peak tension.
Add the Dumbbell Hammer Curls (with Arm Blaster) to Your Custom Workout Routine
Build a personalized, science-backed workout plan matching your training goals, equipment access, and schedule.
Comfort & Joint Safety Tips
Lifters with distal biceps tendinopathy or golfer's elbow (medial epicondylitis) should use neutral-grip hammer curls or EZ-bars to reduce wrist pronation torque. If joint irritation persists, immediately stop and substitute this movement with another exercise from the Upper Arms exercises category.
Muscles Worked
The Dumbbell Hammer Curls (with Arm Blaster) mainly targets your Biceps, with your Forearms helping support the movement.
More Upper Arms Exercises
Assisted Standing Triceps Extension (with Towel)
Assisted Triceps Dip (kneeling)
Band Alternating Biceps Curl
Band Close-Grip Push-Up
Band Concentration Curl
Band One Arm Overhead Biceps Curl
More Biceps Exercises
Barbell Alternate Biceps Curl
Barbell Biceps Curl (with Arm Blaster)
Barbell Curl
Barbell Drag Curl
Barbell Lying Preacher Curl
Barbell Preacher Curl
Equipment Alternatives
Don't have dumbbell? These target the same biceps with different equipment.
Biceps Leg Concentration Curl
Barbell Alternate Biceps Curl
Cable Close Grip Curl
EZ Bar Seated Close Grip Concentration Curl
FAQ
- What muscles does the Dumbbell Hammer Curls (with Arm Blaster) work?
- The Dumbbell Hammer Curls (with Arm Blaster) 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 Hammer Curls (with Arm Blaster)?
- You do the Dumbbell Hammer Curls (with Arm Blaster) 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 is the most common form mistake on the Dumbbell Hammer Curls (with Arm Blaster)?
- The most common mistake is swinging hips & lower back: Using momentum from the hips to swing the weight upward eliminates the initial concentric overload on the biceps.. Lowering the weight slowly (about 2 to 3 seconds) builds more muscle and keeps your joints safe.
- How many sets and reps should I perform on the Dumbbell Hammer Curls (with Arm Blaster)?
- 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 Hammer Curls (with Arm Blaster)?
- If you don't have access to a dumbbell, the Biceps Leg Concentration Curl targets the same biceps using body weight instead. This alternative replicates the same joint angle and movement plane while allowing you to train effectively with different available gear. You can also substitute it seamlessly in our free Workout Plan Builder.