Arms · Elbow extension

Incline Dumbbell Triceps Extension

The incline dumbbell triceps extension is a lying extension on an incline bench where you bend your elbows to lower two dumbbells beside your head, then straighten them again. Dumbbells give your wrists a natural path and your arms independent movement, while the incline stretches the long head of the triceps.

Also known as: Incline dumbbell skullcrusher, Incline DB triceps extension, Incline bench dumbbell extension

Muscle group: Arms
Movement pattern: Elbow extension
Type: Isolation
Equipment: Dumbbells, Adjustable bench
Difficulty: Intermediate

What muscles does the incline dumbbell triceps extension work?

Primary movers

Triceps brachii (long head)

Assisting muscles

Triceps brachii (lateral and medial heads)
Anterior deltoid
Forearm flexors

The triceps straighten the elbow. The incline puts the arms behind the body so the long head is stretched at the bottom of each rep.

Dumbbells let your hands move freely, so your wrists and elbows can follow their own path. That is often more comfortable than a straight bar.

Each arm works independently, which highlights imbalances and lets you match reps on both sides.

The load is lighter than a bar, but the freedom of movement and comfort often let people train closer to failure with good form.

How to do the incline dumbbell triceps extension

Setup

1
Set an adjustable bench to 30 to 45 degrees.
2
Lie back holding a dumbbell in each hand above your chest.
3
Turn your palms to face each other.
4
Keep your upper arms pointing straight up.

Execution

1
Bend your elbows, lowering the dumbbells beside your head.
2
Lower until you feel a deep stretch.
3
Straighten your elbows to press back up.
4
Squeeze your triceps at the top.
5
Keep your upper arms still.
6
Control the dumbbells throughout.

Common incline dumbbell triceps extension mistakes

Flaring the elbows

Wide elbows reduce triceps tension.

The fix: Keep your elbows pointing up and close together.

Moving the upper arms

Swinging the arms turns it into a pullover.

The fix: Keep your upper arms fixed.

Too heavy

Heavy dumbbells are hard to control near your head.

The fix: Choose a weight you can control for 10 to 12 reps.

Rushing

Dropping into the stretch loses control.

The fix: Take two to three seconds to lower.

How many sets and reps?

Goal	Sets	Reps	Load	Rest
Hypertrophy	3	10–12	Moderate, 1–2 RIR	60–90 s
Stretch focus	3	12–15	Light to moderate	60 s
Beginner	2	10	Light	60 s

A good option if bars irritate your wrists or elbows. Pause briefly at the stretch. Use a spotter or a light weight to start while you learn the path.

Running the incline dumbbell triceps extension in your next block? Hercules logs every set, shows last session's numbers before you lift, and suggests when to add weight.

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