Alternating Dumbbell Preacher Curl
In SetGrip: Dumbbell Preacher Curl (Alternating)
- Secondary muscles
- Forearms
- Body part
- Upper Arms
- Position
- Standing
- Laterality
- Alternating sides
- Category
- Strength
Track this exercise in SetGrip — no account needed
On the preacher pad, the bottom third of the rep is where the biceps work hardest, and dumbbells let each arm find its own wrist angle there. Curling one side at a time makes strength gaps easy to spot, since the pad prevents the shoulder tricks that normally hide them.
How to do the Alternating Dumbbell Preacher Curl
- Sit on a preacher bench with a dumbbell in each hand, palms facing up.
- Rest your upper arms on the pad of the preacher bench, allowing your arms to fully extend.
- Keeping your upper arms stationary, exhale and curl the dumbbell in your right hand as you contract your biceps.
- Continue to curl the dumbbell until your biceps are fully contracted and the dumbbell is at shoulder level.
- Pause for a moment, then inhale and slowly lower the dumbbell back to the starting position.
- Repeat the movement with your left arm.
- Continue alternating arms for the desired number 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.
Track the Alternating Dumbbell Preacher Curl in SetGrip
All 1,100+ exercises with animations are in the app. No account, no sign-up — your history stays on your iPhone and in your private iCloud. Works with Apple Watch.
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.