Arms · Isolation
Dumbbell Overhead Tricep Extension
The dumbbell overhead tricep extension is an isolation exercise where you hold a dumbbell behind your head with both hands and straighten your arms to press it overhead. Raising the arms stretches the long head of the triceps, so this exercise trains it in the lengthened position that pushdowns and close-grip presses miss.
Also known as: Overhead dumbbell extension, Seated overhead tricep extension, French press, Dumbbell overhead extension
- Muscle group
- Arms
- Movement pattern
- Isolation
- Type
- Isolation
- Equipment
- Dumbbell, Bench with back support (optional)
- Difficulty
- Beginner
What muscles does the dumbbell overhead tricep extension work?
Primary movers
- Triceps brachii (long head)
Assisting muscles
- Triceps brachii (lateral and medial heads)
- Core
The triceps have three heads, but only the long head crosses the shoulder joint as well as the elbow. That means its length depends on arm position. With the arms overhead, the long head is pulled into a deep stretch before the elbow even bends.
That is the point of overhead work. The long head is the largest of the three heads, and training it in the stretched position has been shown to grow the triceps more than training it with the arms at the sides. Pushdowns and pressing leave this stretch largely untrained.
The lateral and medial heads still straighten the elbow on every rep, so the whole triceps works. The overhead position simply adds the long head stretch on top.
Standing versions ask the core to resist the arching that the overhead load encourages. Sitting on a bench with a back support removes most of that demand and is the better choice when the goal is purely triceps.
How to do the dumbbell overhead tricep extension
Setup
- 1
Sit on a bench with a back support, or stand with feet hip-width apart and your core braced.
- 2
Hold one dumbbell vertically by cupping the top plate with both palms, thumbs wrapped around the handle.
- 3
Press the dumbbell overhead until your arms are straight and your biceps are near your ears.
- 4
Pull your ribs down so your lower back is not arched.
Execution
- 1
Bend at the elbows to lower the dumbbell behind your head, keeping your upper arms pointing towards the ceiling.
- 2
Lower until you feel a strong stretch in the back of the arms, typically with the forearms just past parallel to the floor.
- 3
Keep your elbows pointing forward rather than flaring out to the sides.
- 4
Straighten your arms to press the dumbbell back overhead.
- 5
Lock out fully at the top without letting the upper arms move forward.
- 6
Lower over two to three seconds on every rep.
Common dumbbell overhead tricep extension mistakes
Flaring the elbows out wide
Letting the elbows drift apart as the dumbbell lowers, which shortens the stretch and stresses the elbow joint.
The fix: Keep the elbows pointing forward, roughly shoulder-width apart. A small amount of flare is natural, a large amount means the weight is too heavy.
Turning it into a press
Moving the upper arms forward and back so the shoulders help lift the weight, which takes the long head stretch out of the exercise.
The fix: Keep the upper arms still and close to vertical. Only the forearms should move.
Arching the lower back
Pushing the ribs up and arching the spine to get the dumbbell overhead, which loads the lower back and makes the triceps work easier.
The fix: Brace the abs and pull the ribs down, or sit with your back against a bench support.
Cutting the depth short
Only lowering the dumbbell a few inches, missing the stretched position that makes this exercise worth doing.
The fix: Lower until the forearms pass parallel to the floor, or as far as your elbows comfortably allow.
How many sets and reps?
| Goal | Sets | Reps | Load | Rest |
|---|---|---|---|---|
| Hypertrophy | 3 | 10–15 | Moderate, 1–2 RIR | 60–90 s |
| Long head focus | 3 | 8–12 | Moderate, 1 s pause at the bottom | 90 s |
| Elbow-friendly volume | 2–3 | 15–20 | Light | 60 s |
Overhead extensions complement pressing and pushdowns rather than replacing them. A sensible arm routine has one heavy press, such as close-grip bench or dips, plus one overhead movement like this for the long head stretch. Two to three sets of 10–15 is plenty. The stretched position is demanding on the elbows, so build up depth and load gradually.
Running the dumbbell overhead tricep extension in your next block? Hercules logs every set, shows last session's numbers before you lift, and suggests when to add weight.
Get it on Google PlayDumbbell Overhead Tricep Extension variations and alternatives
Overhead Cable Triceps Extension
AlternativeCables keep tension at the top of the movement and make it easier to adjust the load in small steps.
Single-Arm Overhead Extension
EasierOne arm at a time makes it easier to keep the elbow pointing forward and allows a deeper stretch.
Skullcrusher
AlternativeLying down puts the arms at a smaller angle overhead, trading some long head stretch for heavier loading.
Cable Triceps Pushdown
AlternativeArms at the sides shifts emphasis to the lateral and medial heads. Pair the two for complete triceps work.
Frequently asked questions
What muscles does the overhead tricep extension work?
All three heads of the triceps, with particular emphasis on the long head. The overhead arm position stretches the long head in a way most other triceps exercises do not, which makes it an important part of complete triceps training.
Should I do overhead extensions seated or standing?
Seated with a back support is the better default. It stops the lower back arching and keeps all of the effort on the triceps. Standing works too but adds a core demand that can limit how much you can lift.
Why do overhead extensions hurt my elbows?
The stretched position places a lot of stress on the elbow joint, especially with heavy weights and elbows flaring wide. Lighten the load, keep the elbows pointing forward, and try a single-arm version or a cable, which tend to sit more comfortably.
Are overhead extensions better than pushdowns?
For the long head of the triceps, yes, because the overhead position stretches it under load. Pushdowns are easier to load and better for the lateral head. Using both covers the whole muscle.
Is a French press the same as an overhead tricep extension?
The name is used for both the overhead dumbbell extension and the lying barbell extension, depending on the gym and the country. The movement pattern and the muscles trained are essentially the same.
Hercules tracks every dumbbell overhead tricep extension you log, shows you last session's numbers before you lift, and flags when your progress stalls.
Get it on Google Play