Dumbbell Seated Triceps Extension (VERSION 2) exercise animation (Male)

Dumbbell Seated Triceps Extension (VERSION 2)

Target muscle
Triceps Brachii
Equipment
Dumbbell
Body part
Upper Arms
Type
Strength

The Dumbbell Seated Triceps Extension (VERSION 2) is a seated overhead isolation exercise that targets the triceps brachii. Holding a single dumbbell overhead and lowering it behind your head, it loads the triceps through a long, stretched range and helps build upper-arm size and lock-out strength.

How to do the Dumbbell Seated Triceps Extension (VERSION 2)

  1. 1Sit upright on a bench with your feet flat on the floor and your core braced. Use a bench with a back support if available to keep your torso vertical.
  2. 2Grasp one dumbbell with both hands, cupping your palms under the top plate so the handle hangs down.
  3. 3Press the dumbbell straight overhead until your arms are fully extended, with your upper arms close to your head.
  4. 4Keep your elbows pointing forward and your upper arms still as you bend at the elbows.
  5. 5Lower the dumbbell in a controlled arc behind your head until you feel a stretch in your triceps.
  6. 6Pause briefly at the bottom without letting your elbows flare out to the sides.
  7. 7Extend your elbows to press the dumbbell back overhead until your arms are fully straight, squeezing the triceps at the top.
  8. 8Complete your reps, then lower the dumbbell under control to your lap or the floor.

Form tips

  • Keep your upper arms pinned next to your head so the elbows do the work and the triceps stay under tension.
  • Move through a full range of motion — a deep stretch at the bottom drives more growth than a short, partial rep.
  • Brace your core and avoid arching your lower back, especially as the set gets harder.
  • Start lighter than you would for a pressing movement; this is an isolation exercise and the overhead position is unforgiving of momentum.

Common mistakes

  • Letting the elbows flare out to the sides, which shifts work off the triceps and stresses the elbow joint.
  • Using the lower back and shoulders to heave the weight up, which turns the lift into a press and removes tension from the triceps.
  • Cutting the range short and never reaching the stretched bottom position, which limits the muscle-building stimulus.
  • Lowering the dumbbell too fast behind the head, risking strain on the elbows and shoulders when the weight is heavy.

Frequently asked questions

What muscles does the dumbbell seated triceps extension work?

It isolates the triceps brachii, the muscle on the back of the upper arm responsible for straightening the elbow. The overhead position emphasizes the long head of the triceps.

Why do it seated instead of standing?

Sitting, especially against a back support, stabilizes your torso and reduces the temptation to use leg drive or back swing, so the triceps do more of the work.

How many sets and reps should I do?

For most lifters, 3–4 sets of 10–15 reps with a controlled tempo works well. Since this is an isolation move, prioritize a full stretch and clean form over heavy loading.

Is the dumbbell seated triceps extension good for beginners?

Yes, if you start light and control the weight. The overhead position requires shoulder mobility, so keep the load modest and stop short of any elbow or shoulder discomfort.

Related exercises