Seated Dumbbell Inner Biceps Curl
The seated dumbbell inner biceps curl is a curl variation where you hold your arms out to the sides at roughly shoulder height, then curl the dumbbells up and in toward the center of your chest. The wider starting angle changes the line the biceps pulls through compared to a standard curl, and many lifters use it specifically to chase a stronger peak contraction at the top of the movement.
Why it works
A standard curl moves the forearm through an arc directly in front of the body, but starting with your arms out to the sides changes the angle the biceps has to pull through to bring the dumbbells up and in toward your chest. That wider starting position asks the biceps to work through a slightly different range than a typical curl, and the inward finish at the top creates a strong, focused squeeze that many lifters feel more distinctly than they do with a standard curl. Because the arms move both upward and inward at once, the exercise also demands a bit more control than a straight up-and-down curl, which tends to slow the tempo down naturally and keep tension on the muscle longer.
Set up
- Take a seat on a bench, a dumbbell held in each hand, and raise your arms out to the sides to roughly shoulder height or slightly below.
- Rotate your palms to face forward or slightly upward before you begin.
- Keep your chest up and your torso still.
- Keep a slight bend in your elbows at the start rather than locking them out.
How to do it
- Curl the dumbbells up and inward, bringing them toward the center of your chest.
- Continue the inward curl until your biceps reach a full, strong contraction with the dumbbells close together in front of your chest.
- Pause briefly at the top, squeezing your biceps.
- Lower the dumbbells back out to the sides under control, reversing the same path.
- Keep your torso upright and still throughout; avoid swinging your arms to build momentum.
- Repeat for the full set with a steady, controlled tempo.
Form cues
- Arms start wide, finish in toward the chest.
- Torso stays still, no swinging.
- Squeeze hard at the inward finish.
- Control the return back out to the sides.
Breathing: Exhale as you curl the dumbbells up and in, inhale as you lower them back out to the sides.
Common mistakes
Swinging the arms forward using shoulder momentum instead of curling with the elbows.
Fix: Slow the tempo down and focus on bending the elbows to bring the weight in; a swinging motion turns this into a shoulder movement instead of a biceps one.
Starting with the arms too low, closer to the hips than the shoulders.
Fix: Set your arms out closer to shoulder height at the start; too low a starting position changes the angle the biceps works through.
Rushing the squeeze at the top instead of pausing to feel the contraction.
Fix: Hold the inward position for a moment each rep, since that peak squeeze is much of the point of this particular curl variation.
Letting the dumbbells drop quickly on the way back out to the sides.
Fix: Lower the dumbbells with the same control you used to curl them in; a fast drop skips a large part of the muscle's working range.
How to program it
- As an isolation curl variation, two or three sets of 10 to 12 reps a couple of times a week fits well alongside your other arm training.
- Use a lighter dumbbell than you would for a standard seated curl; the wider starting angle makes the exercise feel harder at the same weight.
- It pairs naturally with a standard curl in the same session, training the biceps through two slightly different angles.
- Prioritize the squeeze at the top over the amount of weight moved; this exercise rewards a strong peak contraction more than heavy loading.
Safety notes
- Keep the starting arm position close to shoulder height rather than raising the arms uncomfortably high, which can strain the shoulders instead of the biceps.
- Choose a weight light enough to keep the movement smooth and controlled through the full curl and return.
Exercise profile
- Force
- Pull
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How many sets and reps should I do for the seated dumbbell inner biceps curl?
Two or three sets of 10 to 12 reps a couple of times a week is a good starting point, using a lighter weight than you'd use for a standard curl.
What can I use if I don't have a bench to sit on?
A standing inner biceps curl uses the same wide-arm angle and curling path without needing to be seated.
Why does this feel harder than a regular seated curl at the same weight?
The wider starting position and the inward finish change the angle the biceps pulls through, which many lifters find demands more control than a standard curl even at a lighter load.
How is this different from a hammer curl?
A hammer curl uses a neutral, palms-facing-in grip through a standard curling path, while this exercise keeps the palms rotating and starts with the arms held wide out to the sides.
Should I do this before or after a standard biceps curl?
Doing it after a standard curl works well, since the biceps are already warm and the lighter weight this exercise needs is easier to judge once you've felt how the joint is responding that day.