Arms · Elbow flexion

Incline Dumbbell Curl

The incline dumbbell curl is performed seated on an incline bench set to 45 to 60 degrees, with your arms hanging straight down behind your torso. Because the shoulders are extended, the long head of the biceps is stretched at the bottom, and that long-muscle-length position is the reason many lifters use it for biceps growth.

Also known as: Incline curl, Incline bench dumbbell curl, Seated incline curl

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

What muscles does the incline dumbbell curl work?

Primary movers

Biceps brachii (long head)

Assisting muscles

Brachialis
Brachioradialis
Forearm flexors

The long head of the biceps crosses the shoulder joint. When your arms hang behind your torso, as on an incline bench, it is stretched before you begin to curl.

A stretched muscle under load is a strong growth signal. That is why incline curls are popular as a way to target the long head.

The incline also stops you from swinging, since your back is supported and the weights hang behind you.

Because the stretch is deep, use lighter weights than standing curls and keep the lowering slow to protect the biceps tendon.

How to do the incline dumbbell curl

Setup

1
Set an adjustable bench to 45 to 60 degrees.
2
Sit back with a dumbbell in each hand and your arms hanging down.
3
Keep your head and back against the bench.
4
Turn your palms to face forward.

Execution

1
Curl the dumbbells up toward your shoulders.
2
Keep your elbows behind your torso and still.
3
Squeeze your biceps at the top.
4
Lower slowly until your arms are straight.
5
Keep your shoulders back against the bench.
6
Do not swing.

Common incline dumbbell curl mistakes

Elbows drifting forward

Moving the elbows forward removes the stretch.

The fix: Keep your upper arms still and behind your torso.

Too heavy

Heavy weights cause swinging and tendon strain.

The fix: Use lighter weights than your standing curl.

Short range

Not lowering fully misses the stretch.

The fix: Lower until your arms are straight.

Bench too upright

An upright bench reduces the stretch.

The fix: Use 45 to 60 degrees.

How many sets and reps?

Goal	Sets	Reps	Load	Rest
Hypertrophy	3	8–12	Moderate, 1–2 RIR	60–90 s
Stretch focus	3	10–15	Light to moderate	60 s
Beginner	2	10	Light	60 s

Do it early in your biceps session while you are fresh. A slow lowering phase and a controlled stretch matter more than weight. Reduce the angle if your shoulders feel strained.

Running the incline dumbbell curl 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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Frequently asked questions

What does the incline curl work?

The biceps, especially the long head, plus the brachialis and forearm.

What angle should I use?

45 to 60 degrees. Lower angles give more stretch but are harder on the shoulders.

Why do incline curls feel harder?

The stretched start position and the lack of swinging make the muscle work harder.

How heavy should I go?

Lighter than standing curls. Focus on a slow lowering phase.

Are they safe for the shoulders?

Usually. If you feel strain in the front of the shoulder, raise the bench angle.

Hercules tracks every incline dumbbell curl you log, shows you last session's numbers before you lift, and flags when your progress stalls.