Seated Bent-Over Two-Arm Dumbbell Triceps Extension
The seated bent-over two-arm dumbbell triceps extension is a two-handed triceps kickback done from a seated, hip-hinged position. You hold a dumbbell in each hand, pin your upper arms against your ribs, and extend your elbows straight back to isolate the triceps at the end of the movement. It suits lifters who want a controlled, seated alternative to standing kickbacks, since the bench takes lower-back and balance demands out of the equation and lets you focus purely on the elbow extension.
Why it works
Your triceps exist to straighten your elbow, and they get their strongest, most isolated contraction when the upper arm is held still and slightly behind the torso, which is exactly the position this exercise locks you into. Bending forward at the hips and pinning your upper arms against your ribs removes the shoulders from the movement almost entirely, so nearly all the work falls on the triceps as they extend the forearm against the dumbbell's resistance. Because it's a single-joint push movement, it lets you fatigue the triceps directly without any help from the chest or shoulders, which is useful once a pressing exercise has already worn those bigger muscles down but the triceps still have more work left in them.
Set up
- Take a seat toward the front edge of a bench, holding one dumbbell in each hand with your palms turned toward you.
- Hinge forward at the hips until your torso is close to parallel with the floor, keeping your back flat rather than rounded.
- Bend your elbows to about 90 degrees and tuck your upper arms against your ribs so they stay still throughout the set.
- Brace your core lightly to support the hinged position before your first rep.
How to do it
- Keeping your upper arms pinned against your ribs, extend your elbows to straighten your arms behind you.
- Continue until your arms are fully extended and your triceps are fully contracted.
- Pause for a moment at full extension, squeezing your triceps.
- Bend your elbows again, guiding the dumbbells down to that same 90-degree bend you began from, moving with control.
- Keep your torso still and hinged throughout the set; only your forearms should move.
- Repeat for the full set without letting your upper arms drift away from your ribs.
Form cues
- Elbows pinned to your ribs the whole set.
- Only the forearm moves, not the shoulder.
- Flat back, hips hinged, not rounded.
- Squeeze at full extension before lowering.
Breathing: Exhale as you extend your elbows back, inhale as you bend them to lower the weight.
Common mistakes
Letting the upper arms swing away from the ribs during the extension.
Fix: Keep your elbows tucked and stationary; if they drift away from your body, the shoulders start doing work that belongs to the triceps.
Rounding the back to hinge forward instead of bending at the hips.
Fix: Set your hips back and keep your spine flat before you start the set, the same way you'd set up for a hip hinge in a deadlift.
Using momentum to swing the dumbbells backward.
Fix: Slow the tempo down and control the extension; a slower rep keeps tension on the triceps instead of letting the swing do the work.
Only partially extending the elbows at the top of the movement.
Fix: Straighten your arms fully on every rep so the triceps get the full contraction; a short range of motion trains less muscle.
How to program it
- This is a light isolation movement, so two or three sets of 10 to 15 reps a couple of times a week is a reasonable starting point for most people.
- Place it after a compound pressing exercise like a bench press or shoulder press, when the triceps are already warm from assisting but not yet fatigued from direct work.
- Because both arms extend together, it's easy to notice if one side lags behind the other; slow the tempo down on the weaker side rather than simply adding more weight.
- A light dumbbell goes a long way here; the tucked-elbow position limits how much load your triceps can safely handle before your shoulders start compensating.
Safety notes
- Keep the hip hinge modest if your lower back feels strained during the setup; a shallower forward lean still trains the triceps effectively.
- Choose a lighter dumbbell than you'd expect; once the weight forces your shoulders to help, the exercise loses most of its isolation benefit.
Exercise profile
- Force
- Push
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How many sets and reps should I do for the seated bent-over two-arm dumbbell triceps extension?
Two or three sets of 10 to 15 reps works well for most people, using a light dumbbell that lets you keep your elbows pinned to your ribs for every rep of the set.
What's a good substitute if I don't have dumbbells?
A cable rope overhead triceps extension trains the same overhead-extension pattern with constant tension from a cable stack instead of a bent-over dumbbell position.
Why can't I feel this in my triceps?
Check that your upper arms stay tucked against your ribs through the whole set; if they swing away from your body even slightly, your shoulders take over and the triceps barely fire.
How is this different from the one-arm version?
The one-arm version lets you focus fully on each side and add a slight rotation at the top for extra contraction, while the two-arm version trains both sides at once and takes less total time to finish a set.