Is it better to use one dumbbell or two for this exercise?

Both work. This version uses one dumbbell held in both hands, which is simple to set up and lets the arms share the load. Holding one dumbbell in each hand lets each arm work on its own and shows up a weaker side, but you have to control two weights behind your head at once.

What should I do if my wrists hurt during this exercise?

Try adjusting your grip, using a lighter weight, or switching to an EZ bar to reduce wrist strain.

Can I perform this exercise seated instead of standing?

Yes. The seated version is the same movement on a bench. Sitting takes your legs out of it and makes it easier to stop your lower back from arching, so it is a good place to learn the movement before doing it standing.

Is the overhead position better for building the triceps than pushdowns?

It looks that way. In a 12-week study, 21 adults trained cable triceps extensions with one arm overhead and the other at their side, and the overhead arm gained about 1.4 times more triceps size, especially in the long head, even though it lifted lighter loads. That study used a cable rather than a dumbbell, but the overhead arm position is the same.

How do I get the dumbbell overhead safely?

Lift the dumbbell to your chest with both hands cupping the top plate, then press it straight up to arm's length before your first rep. At the end of the set, extend your arms fully and bring the dumbbell back down in front of you rather than letting it drop behind your head.

Dumbbell Overhead Triceps Extension

What Is the Dumbbell Overhead Triceps Extension?

Dumbbell Overhead Triceps Extension is an isolation exercise that primarily targets the triceps, with the most emphasis on the long head and the medial and lateral heads working alongside it. It is an intermediate-level exercise ideal for building triceps size, strength, and endurance.

This version is done standing, with a single dumbbell held overhead in both hands. Standing gives your trunk a job: as the weight travels behind your head, your abs have to keep your ribs down and stop your lower back from arching to help the press. That is the main difference from the Dumbbell Seated Triceps Extension, the same movement on a bench, where your legs are out of the movement and your torso is easier to keep still.

The overhead arm position is what sets this exercise apart from pushdowns. The long head is the only part of the triceps that crosses the shoulder, so raising the arm overhead puts it on stretch, and every rep works it at a long muscle length. The same position makes the movement feel harder, so expect to use a noticeably lighter weight than you would for pushdowns.

It usually comes near the end of an upper-body or arm session, after the pressing work. It suits lifters who can hold a light dumbbell overhead without the lower back arching and who have the shoulder mobility to bring the upper arms up beside the head. If either is a problem, build up with the Cable Triceps Pushdown (Rope) and the seated version first.

Muscles Worked

MuscleActivation

Triceps Brachii (Long Head): Primary
Triceps Brachii (Medial Head): High
Triceps Brachii (Lateral Head): Medium
Deltoid: Low
Serratus Anterior: Minimal

Instructions

Stand upright with your feet about shoulder-width apart and hold one dumbbell vertically, cupping the underside of the top plate with both palms and your thumbs wrapped around the handle.
Bring the dumbbell to your chest and press it overhead until your arms are fully extended, with your upper arms close to your ears.
Brace your abs and keep your ribs down so your lower back does not arch.
Keeping your upper arms stationary, lower the dumbbell behind your head by bending only at the elbows.
Lower the dumbbell until you feel a comfortable stretch in your triceps.
Press the dumbbell back up by extending your elbows until your arms are fully straightened overhead.
Repeat for the desired number of repetitions, then bring the dumbbell down in front of you to your chest before lowering it.

Common Mistakes

Elbows flaring outward
Allowing elbows to drift out reduces triceps isolation and places stress on the shoulders.
Upper arms drifting forward
Letting the elbows travel forward as you press turns part of each rep into a shoulder movement and takes the stretch off the long head.
Overarching the lower back
Failing to engage your core can cause excessive lower back strain during the lift.
Incomplete range of motion
Lowering the dumbbell only halfway limits triceps activation and reduces effectiveness.
Using momentum to lift
Swinging the weight uses body momentum instead of triceps strength, risking injury.

Injuries

Dumbbell Overhead Triceps Extension is a medium risk exercise when performed with proper technique. The loads are modest, but the dumbbell travels over and behind your head, so control matters more here than on most arm exercises.

The elbows take the most stress, especially at the bottom of the rep, where the joint is deeply bent and the triceps are fully stretched. The shoulders have to hold the arms overhead for the whole set, which can bring on a pinching feeling in people with limited overhead mobility. Standing adds the lower back: when the weight is too heavy or the core is not braced, the lower back arches to help push the dumbbell up.

To prevent injuries, focus on slow and controlled movements, keep your elbows close to your head, and engage your core muscles. Choose a weight you can manage without compromising your form. If standing makes your back arch, switch to the Dumbbell Seated Triceps Extension. If the overhead position itself bothers your shoulders, use the Cable Triceps Pushdown (Rope), which trains the triceps with the arms at your sides. Progress by adding reps or slowing the lowering phase before adding weight.

Stop the set if you feel sharp pain in the elbow, a pinch at the front or top of the shoulder, or pain that lingers after the set.

Overview

Primary Focus: Triceps
Equipment: Dumbbell
Modality: Strength
Difficulty: Intermediate

Alternative Exercises

Other Names for the Dumbbell Overhead Triceps Extension

The Dumbbell Overhead Triceps Extension is also known as:

Standing Dumbbell Triceps Extension

Frequently Asked Questions

Q: Is it better to use one dumbbell or two for this exercise?: Both work. This version uses one dumbbell held in both hands, which is simple to set up and lets the arms share the load. Holding one dumbbell in each hand lets each arm work on its own and shows up a weaker side, but you have to control two weights behind your head at once.
Q: What should I do if my wrists hurt during this exercise?: Try adjusting your grip, using a lighter weight, or switching to an EZ bar to reduce wrist strain.
Q: Can I perform this exercise seated instead of standing?: Yes. The seated version is the same movement on a bench. Sitting takes your legs out of it and makes it easier to stop your lower back from arching, so it is a good place to learn the movement before doing it standing.
Q: Is the overhead position better for building the triceps than pushdowns?: It looks that way. In a 12-week study, 21 adults trained cable triceps extensions with one arm overhead and the other at their side, and the overhead arm gained about 1.4 times more triceps size, especially in the long head, even though it lifted lighter loads. That study used a cable rather than a dumbbell, but the overhead arm position is the same.
Q: How do I get the dumbbell overhead safely?: Lift the dumbbell to your chest with both hands cupping the top plate, then press it straight up to arm's length before your first rep. At the end of the set, extend your arms fully and bring the dumbbell back down in front of you rather than letting it drop behind your head.