Arm Blaster Dumbbell Hammer Curl
In SetGrip: Dumbbell Hammer Curl (Arm Blaster)
- Secondary muscles
- Forearms
- Body part
- Upper Arms
- Position
- Standing
- Laterality
- Bilateral (both sides together)
- Category
- Strength
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Hammer curls tempt you to go heavy because the neutral grip feels strong, and heavy is exactly when elbows start drifting forward. Fixing your upper arms against the arm blaster's plate removes that slack, so the brachialis gets hit hard with lighter dumbbells than you would swing through a standing hammer curl.
How to do the Arm Blaster Dumbbell Hammer Curl
- Stand up straight with a dumbbell in each hand, palms facing your torso.
- Keep your elbows close to your torso and rotate the palms of your hands until they are facing forward.
- This will be your starting position.
- Now, while holding your upper arm stationary, exhale and curl the weights while contracting your biceps.
- Continue to raise the weights until your biceps are fully contracted and the dumbbells are at shoulder level.
- Hold the contracted position for a brief pause as you squeeze your biceps.
- Then, inhale and slowly begin to lower the dumbbells back to the starting position.
- Repeat for the recommended amount of repetitions.
Tip: Lower for three seconds and stop just short of locking out the elbow to keep the muscle under tension.
Muscles worked
Primary
Biceps · Arms
The biceps bend the elbow and turn the palm up, so they work hardest when the palms face up; hammer and reverse grips shift more of the work to the forearm muscles.
Secondary
- Forearms — The brachioradialis and forearm flexors take over on hammer and reverse curls and assist on every other variation.
Common mistakes
- Elbows drifting forward — as the elbows come up the front delt starts to lift the weight; pin the elbows to your sides and let only the forearm move.
- Swinging from the hips — a small rock backward on each rep means the weight is too heavy; drop it and curl from a dead stop.
- Cutting the bottom short — stopping with the elbow bent shortens the range where the biceps are stretched; lower until the arm is nearly straight.
- Wrists curling at the top — flexing the wrist toward you brings the forearm flexors in; keep the wrist neutral or slightly extended.
Where it fits in a workout
Curls go at the end of a pull session or arm day, after the rows and pulldowns that also load the biceps. Superset them with a triceps pushdown or extension.
How many sets, how heavy and how hard: see what the ACSM position stands support.
Variations and alternatives
Similar exercises
Without dumbbell
When to talk to someone
- Chest discomfort, feeling faint or lightheaded, or trouble breathing during or after exercise can be signs of a heart attack. In the US, call 911 right away; elsewhere, call your local emergency number.
- Heart, metabolic or kidney disease, or symptoms like these when you are active: talk to your doctor before you start or step up training.
- Pregnant: ask your obstetric care provider which exercise suits you.
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More exercises
Sources
- ACSM position stand on exercise quantity and quality (Garber et al., 2011)
- ACSM preparticipation health screening (Riebe et al., 2015)
- ACOG Committee Opinion No. 804 on exercise in pregnancy (2020)
- CDC: About Heart Attack Symptoms, Risk, and Recovery (2024)
Sources checked on October 17, 2026. Full citations are in the exercise library.
Animation and exercise data: ExerciseDB, licensed to SetGrip. General information, not medical or coaching advice.