Is the incline version better for the long head than the flat one?

It holds the long head at a longer length, but no study has compared incline and flat lying extensions directly. In a 12-week study of 21 adults, cable triceps extensions with the arm overhead grew the long head about 1.5 times more than pushdowns with the arm at the side; the incline puts the arm between those two positions, so treat it as a useful variation rather than a proven upgrade.

What bench angle should I use?

A moderate incline of about 30 to 45 degrees works for most people. Steeper settings push the arms further overhead, which many shoulders tolerate poorly, and tend to turn the movement into an overhead press.

Should my palms face each other or face forward?

Palms facing each other, as shown, lets the dumbbells pass beside the head and is usually the most comfortable grip for the wrists and elbows. A palms-forward grip works the triceps the same way, but the dumbbells have to travel toward the forehead and many lifters find it harder on the elbows.

Can this replace overhead triceps extensions?

It covers much of the same ground, since both raise the upper arm and lengthen the long head, and the bench support makes it easier to control than a standing Dumbbell Overhead Triceps Extension. Most programs only need one of the two in a session, alongside a pressing movement or a pushdown.

Dumbbell Incline Triceps Extension

What Is the Dumbbell Incline Triceps Extension?

Dumbbell Incline Triceps Extension is an isolation exercise that primarily targets the triceps and also engages the lats, shoulders and forearms as stabilizers. It is an intermediate-level movement performed lying back on an incline bench with a dumbbell in each hand, palms facing each other, lowering the weights beside the head by bending only at the elbows and then extending the arms back up.

The exercise sits between the Dumbbell Lying Triceps Extension on a flat bench and fully overhead work such as the Dumbbell Overhead Triceps Extension. Because the torso is reclined rather than flat, the upper arms end up closer to overhead relative to the body. The long head of the triceps is the only head that crosses the shoulder, so raising the arm this way holds it at a longer length through the set than the flat version does, while the lateral and medial heads do the same elbow-extension work in both. The Dumbbell Decline Triceps Extension does the opposite, keeping the arms lower relative to the torso.

The bench back supports the spine, so the lower back stays out of the lift and the triceps can be worked hard without the balance demands of a standing overhead extension. Two dumbbells with a neutral grip let each wrist and elbow find its own path, which many lifters find easier on the joints than a straight bar, and they expose a weaker arm instead of letting the stronger one carry it.

It is mainly a hypertrophy accessory, usually placed after the main pressing work of an upper-body or arm session and trained in moderate to higher rep ranges where the load is easy to control. It suits lifters who already handle a flat lying extension or an overhead extension comfortably. Anyone new to triceps isolation, or who lacks the shoulder mobility to hold the upper arms angled back, is better served by building up with the flat Dumbbell Lying Triceps Extension or the Cable Triceps Pushdown (Rope) first.

Muscles Worked

MuscleActivation

Triceps Brachii (Lateral Head): Primary
Triceps Brachii (Long Head): Primary
Triceps Brachii (Medial Head): High
Deltoid: Low
Latissimus Dorsi: Low
Teres Major: Low
Flexor Carpi Radialis: Minimal
Flexor Carpi Ulnaris: Minimal
Rectus Abdominis: Minimal

Instructions

Set an adjustable bench to a moderate incline of about 30 to 45 degrees and sit back with a dumbbell in each hand, feet flat on the floor.
Lie back with your head, upper back and hips against the pad, then press the dumbbells up until your arms are straight above your shoulders, palms facing each other.
Angle your upper arms back slightly so the dumbbells sit above your forehead, elbows pointing up and about shoulder width apart. This is the start position.
Keeping your upper arms still, bend your elbows and slowly lower the dumbbells beside your head until your forearms pass parallel to the floor and you feel a stretch in the back of your arms.
Keep your wrists straight and your lower back on the pad throughout.
Extend your elbows to press the dumbbells back up to the start position without letting your upper arms swing forward.
Repeat for the desired reps, then bend your elbows and bring the dumbbells down to your chest before sitting up.

Common Mistakes

Flaring the elbows
Letting the elbows drift wide moves stress away from the triceps and onto the elbow joint, so keep them pointing up and about shoulder width apart.
Moving the upper arms
Swinging the upper arms forward as you extend lets the shoulders and lats finish the rep, turning the movement into a press instead of a triceps extension.
Bending the wrists back
Letting the dumbbells tip the wrists back loads the forearm tendons at the elbow, so keep the wrists straight in line with the forearms.
Arching off the bench
Lifting the lower back or flaring the ribs to get the arms further back fakes shoulder range and strains the lower back.
Going too heavy
A load you cannot lower slowly ends in shortened reps, wobbling dumbbells beside the head and sore elbows.
Cutting the range short
Stopping well before the forearms pass parallel skips the deep part of the rep where the triceps work at their longest length.

Injuries

Dumbbell Incline Triceps Extension is a low risk exercise when performed with proper technique. The main strain points are the elbows, which take a heavy load in deep flexion at the bottom of each rep, and the front of the shoulders, which hold the upper arms angled back above head height. The dumbbells also pass close to the head, so a weight that is too heavy to control at the bottom is a safety issue as well as a joint one.

To protect the elbows, pick a load you can lower slowly, warm up with a light set or two, keep the wrists straight rather than bent back, and keep the elbows pointing up and roughly shoulder width apart instead of letting them flare. To protect the shoulders, set the bench at a moderate incline and only angle the upper arms back as far as you can hold without the ribs flaring or the lower back arching off the pad. Bring the dumbbells to the chest before sitting up or lowering them to the floor at the end of a set, rather than dropping them from behind the head.

If the incline position bothers the shoulders, regress to the flat Dumbbell Lying Triceps Extension or the Cable Triceps Pushdown (Rope), which keep the arms lower. To progress, add load gradually, slow the lowering phase, or move to a single arm at a time. Stop the set if you feel sharp pain at the elbow or shoulder, pinching at the front of the shoulder, or numbness or tingling in the hand, and get any pain that persists checked before training through it.

Overview

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

Alternative Exercises

Frequently Asked Questions

Q: Is the incline version better for the long head than the flat one?: It holds the long head at a longer length, but no study has compared incline and flat lying extensions directly. In a 12-week study of 21 adults, cable triceps extensions with the arm overhead grew the long head about 1.5 times more than pushdowns with the arm at the side; the incline puts the arm between those two positions, so treat it as a useful variation rather than a proven upgrade.
Q: What bench angle should I use?: A moderate incline of about 30 to 45 degrees works for most people. Steeper settings push the arms further overhead, which many shoulders tolerate poorly, and tend to turn the movement into an overhead press.
Q: Should my palms face each other or face forward?: Palms facing each other, as shown, lets the dumbbells pass beside the head and is usually the most comfortable grip for the wrists and elbows. A palms-forward grip works the triceps the same way, but the dumbbells have to travel toward the forehead and many lifters find it harder on the elbows.
Q: Can this replace overhead triceps extensions?: It covers much of the same ground, since both raise the upper arm and lengthen the long head, and the bench support makes it easier to control than a standing Dumbbell Overhead Triceps Extension. Most programs only need one of the two in a session, alongside a pressing movement or a pushdown.