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How to do the Dumbbells Seated Triceps Extension

TricepsDumbbellIntermediate

The seated dumbbell triceps extension isolates the long head of the triceps through its fullest possible range of motion, making it one of the most effective tools for building serious upper arm mass. Master the technique here and you will unlock a level of triceps development that pressing movements alone simply cannot deliver.

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Muscles worked

Primary
Triceps
Secondary
Front deltsChest

Step-by-step

  1. Sit tall on a bench, grip one dumbbell with both hands cupped around the inner plate, and press it overhead until your arms are fully extended.
  2. Keeping your upper arms vertical and locked against your ears, hinge only at the elbows to lower the dumbbell in a controlled arc behind your head.
  3. Pause briefly at the bottom when you feel a deep stretch in the triceps, then drive the dumbbell back overhead by straightening your elbows completely.
  4. Lower the weight with intention on every rep, aiming for a 2 to 3 second descent to maximize time under tension.

Common mistakes

  • Flaring the elbows outward reduces long head activation and stresses the joints, so actively squeeze your elbows toward each other throughout the entire set.
  • Using momentum to swing the dumbbell up turns this into a shoulder exercise and removes the load from the triceps, so reduce the weight and own every inch of the movement.
  • Hyperextending the lower back when pressing overhead shifts stress onto the spine, so brace your core firmly and keep your ribcage down for the duration of each set.

Pro tip — At the very top of each rep, actively push the dumbbell toward the ceiling rather than just locking out passively, this final squeeze maximally contracts the long head and compounds the growth stimulus over time.

Sets & reps by goal

Build muscle3–4 sets × 10–15 reps
Get stronger3–4 sets × 6–8 reps
Lose fat / tone3 sets × 12–20 reps

Rest: 60–90 sec between sets.

More Triceps exercises

Barbell Close Grip Bench PressBarbell Close Grip Bench PressBarbell Decline Close Grip To Skull PressBarbell Decline Close Grip To Skull PressBarbell Incline Reverse Grip PressBarbell Incline Reverse Grip PressBarbell Lying Close Grip PressBarbell Lying Close Grip PressBarbell Lying Close Grip Triceps ExtensionBarbell Lying Close Grip Triceps ExtensionBarbell Lying ExtensionBarbell Lying Extension
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