Where should my free hand go?

Either rest it on your stomach or hold the side of the bench. Holding the bench makes it easier to stay square, while resting the hand on your body makes the trunk do more of the steadying.

How heavy should the dumbbell be compared with a two-dumbbell incline press?

Start a little lighter than one of the dumbbells you use for the Dumbbell Incline Bench Press. Add weight only while you can finish every rep without your torso rolling toward the working arm.

Does the incline work the upper chest more than a flat press?

Partly. In an EMG study of women pressing light dumbbells in both hands, the upper chest worked harder on a 45-degree incline while lowering but harder on the flat bench while pressing up, and the front deltoid worked harder on the incline throughout. So the incline reliably adds shoulder work, while the upper chest stays busy on either bench.

What bench angle should I use?

Most lifters use 30 to 45 degrees. The steeper the bench, the more the front of the shoulder takes over, until near vertical it becomes a seated shoulder press.

Should I finish all reps on one arm before switching?

Yes. Start with your weaker arm, then match its reps on the stronger side so both arms do the same work.

Is it better than pressing with two dumbbells?

No, it does a different job. Two dumbbells let you move more total weight for strength and size, while the one-arm version trades load for trunk stability and a clear view of each side's strength, so many programs use both.

Dumbbell Incline Single-Arm Bench Press

What Is the Dumbbell Incline Single-Arm Bench Press?

Dumbbell Incline Single-Arm Bench Press is a compound exercise that primarily targets the chest and also engages the front of the shoulders, the triceps and the core. It is an intermediate-level movement in which you lie back on an incline bench and press one dumbbell from the side of your upper chest to straight above your shoulder, while the other arm stays free.

Working one arm at a time changes the exercise in two ways. Each side has to press its own load, so a stronger arm cannot quietly cover for a weaker one the way it can with a barbell. And because all the weight sits on one side, it tries to roll your torso toward the working arm, so your abs, obliques and hips have to work to keep you square on the bench. That makes it a useful accessory after the main pressing work of a session, for lifters who want to check and even out side-to-side strength or add a trunk-stability demand to their upper-body training.

Setting the bench at an incline brings the front of the shoulder into the press more than a flat bench does, and the steeper the bench, the more the movement turns into a shoulder press. Compared with the Dumbbell Incline Bench Press, you handle less total weight but get the extra stability work. The Cable Incline Single-Arm Bench Press keeps a steadier pull through the whole rep, and the Dumbbell Single-Arm Floor Press shortens the range at the bottom, which many lifters find easier on the shoulder.

The exercise suits lifters who can already press a pair of dumbbells on an incline bench with good control. If keeping your body square is a struggle, build up with the two-dumbbell Dumbbell Incline Bench Press first, and start the one-arm version with a light dumbbell and moderate to high reps.

Muscles Worked

MuscleActivation

Pectoralis Major: Primary
Deltoid: High
External Oblique: Medium
Serratus Anterior: Medium
Triceps Brachii (Lateral Head): Medium
Triceps Brachii (Medial Head): Medium
Infraspinatus: Low
Rectus Abdominis: Low
Triceps Brachii (Long Head): Low
Upper Trapezius: Low

Instructions

Set an adjustable bench to an incline of about 45 degrees. Sit with your back and head against the pad and your feet flat on the floor, wider than hip-width.
Hold one dumbbell, rest it on your thigh, then lie back and bring it to the side of your upper chest, just outside your shoulder.
Turn your palm to face forward, toward your feet, so the handle runs in line with your shoulders. Keep your wrist straight and stacked over your elbow.
Tuck your elbow about 45 degrees from your side, under the dumbbell. Rest your free hand on your stomach or hold the side of the bench.
Brace your abs, set your shoulder blades back and down against the pad, and keep your hips and both shoulders square to the bench.
Press the dumbbell up until your arm is straight and the dumbbell is directly above your shoulder.
Lower it slowly back to the side of your upper chest, stopping where you feel a stretch across your chest and the front of your shoulder without pain.
Finish all reps on one side, then switch hands and repeat. At the end of the set, bring the dumbbell back to your thigh as you sit up.

Common Mistakes

Twisting toward the dumbbell
Letting the torso roll and the opposite shoulder lift off the pad means the weight is too heavy for your trunk to hold square.
Bench set too steep
An incline much past 45 degrees turns the press into a shoulder press and moves the work away from the chest.
Flaring the elbow straight out
Lowering with the upper arm at a right angle to the body stresses the front of the shoulder, so keep the elbow about 45 degrees from your side.
Dropping the dumbbell too fast
Letting the weight fall into the bottom position and bouncing out of it loads the shoulder at its most stretched point and costs control.
Bending the wrist back
Letting the dumbbell tip the wrist backward puts strain on the wrist, so keep it straight and stacked over the elbow.
Loose feet and hips
Feet that slide or lift give the trunk nothing to brace against, so plant them wide and keep both hips on the seat.

Injuries

Dumbbell Incline Single-Arm Bench Press is a medium risk exercise when performed with proper technique. The shoulder takes most of the strain, especially at the bottom of the rep, where the front of the joint is stretched under load. The one-sided weight also adds a twisting force that the trunk has to resist, and lifting a heavy dumbbell into position with one hand can strain the shoulder or lower back before the set even starts.

To keep the shoulder comfortable, set the bench at 30 to 45 degrees rather than steeper, keep the elbow tucked about 45 degrees from your side instead of flared straight out, and lower only as far as you can without pain at the front of the shoulder. Pick a weight you can press without your torso rolling toward the working arm, keep your feet planted, and end the set when your form starts to break down rather than grinding out the last rep.

If the one-arm version is too hard to control, go back to the Dumbbell Incline Bench Press, where the second dumbbell balances the load, or try the Dumbbell Single-Arm Floor Press, where the floor limits how deep the shoulder goes. To progress, add weight gradually, slow down the lowering phase, or take the free hand off the bench so the trunk has to do more of the steadying.

Stop the set if you feel sharp pain at the front of the shoulder, a sudden pull or pop in the chest near the armpit, or numbness or tingling down the arm, and have it checked before pressing again.

Overview

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

Alternative Exercises

Frequently Asked Questions

Q: Where should my free hand go?: Either rest it on your stomach or hold the side of the bench. Holding the bench makes it easier to stay square, while resting the hand on your body makes the trunk do more of the steadying.
Q: How heavy should the dumbbell be compared with a two-dumbbell incline press?: Start a little lighter than one of the dumbbells you use for the Dumbbell Incline Bench Press. Add weight only while you can finish every rep without your torso rolling toward the working arm.
Q: Does the incline work the upper chest more than a flat press?: Partly. In an EMG study of women pressing light dumbbells in both hands, the upper chest worked harder on a 45-degree incline while lowering but harder on the flat bench while pressing up, and the front deltoid worked harder on the incline throughout. So the incline reliably adds shoulder work, while the upper chest stays busy on either bench.
Q: What bench angle should I use?: Most lifters use 30 to 45 degrees. The steeper the bench, the more the front of the shoulder takes over, until near vertical it becomes a seated shoulder press.
Q: Should I finish all reps on one arm before switching?: Yes. Start with your weaker arm, then match its reps on the stronger side so both arms do the same work.
Q: Is it better than pressing with two dumbbells?: No, it does a different job. Two dumbbells let you move more total weight for strength and size, while the one-arm version trades load for trunk stability and a clear view of each side's strength, so many programs use both.