Upper Arms Exercise · Dumbbell
Dumbbell Alternate Biceps Curl (with Arm Blaster)
Also known as: Dumbbell Alternate Bicep Curl (With Arm Blaster), Db Alternate Biceps Curl (With Arm Blaster), Dumbell Alternate Biceps Curl (With Arm Blaster)
- Category
- Upper Arms
- Equipment
- Dumbbell
- Target
- Biceps
Form and technique verified by certified strength coaches; see our editorial standards.
The Dumbbell Alternate Biceps Curl (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
The arm blaster is a curved bar that locks the elbows against the torso, removing the option to swing them forward as the weight gets heavy. That's the entire purpose of the tool — forcing the biceps to do all the lifting instead of letting shoulder momentum sneak in on the harder reps. Lifters who've noticed their elbows drifting forward on regular curls tend to feel the difference immediately.
How to Do the Dumbbell Alternate Biceps Curl (with Arm Blaster)
- Stand tall with feet shoulder-width apart, holding a dumbbell in each hand with palms facing forward.
- Fit the arm blaster securely around your upper arms.
- With your upper arms locked in place, exhale and curl one dumbbell toward your shoulder, contracting your biceps.
- Keep lifting until your biceps are fully squeezed and the dumbbell reaches shoulder height.
- Pause briefly in the fully contracted position, squeezing your biceps.
- Inhale and slowly lower the dumbbell back down to the start.
- Perform the same curl with the opposite arm.
- Keep alternating arms for the desired number of repetitions.
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 Alternate Biceps Curl (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 Alternate Biceps Curl (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 Alternate Biceps Curl (with Arm Blaster) work?
- The Dumbbell Alternate Biceps Curl (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 Alternate Biceps Curl (with Arm Blaster)?
- You do the Dumbbell Alternate Biceps Curl (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 Alternate Biceps Curl (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 Alternate Biceps Curl (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 Alternate Biceps Curl (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.