Can the Dumbbell Pullover expand the rib cage?

No. An adult rib cage does not grow from training, and the stretch felt across the chest comes from the lats, chest and breathing muscles lengthening, not from the ribs changing shape.

Should I do this exercise on chest or back day?

It depends on your focus - perform it on chest day if you want more pec engagement or back day for lat activation.

Can I do this exercise with a barbell instead?

Yes. The Barbell Pullover follows the same arc with the hands apart on the bar, while the dumbbell version keeps the hands together under one plate and needs only a single dumbbell. Use whichever lets you control the full range without shoulder discomfort.

How far back should the dumbbell go?

Lower it until your upper arms are roughly in line with your torso, or stop sooner if your ribs flare, your lower back lifts off the bench or your shoulders pinch. Range gained by arching the back adds strain without adding work for the chest and lats.

Should my arms be straight or bent?

Keep a slight bend in the elbows and hold that same angle for the whole rep. Locked arms stress the elbows, and bending more at the bottom then straightening on the way up turns the movement into a triceps extension.

Dumbbell Pullover

What Is the Dumbbell Pullover?

Dumbbell Pullover is an isolation exercise that primarily targets the chest and back, working the pectoralis major and latissimus dorsi together while also engaging the serratus anterior, teres major and the long head of the triceps. It is an intermediate-level movement performed lying along a flat bench with a single dumbbell held in both hands.

The pullover is unusual among upper-body exercises because it trains the chest and the lats through the same arc. A 2026 review of EMG research on the pullover, drawn from three small studies of mostly barbell and isometric versions in men, found the pectoralis major usually more active than the lats, with the balance between them shifting with shoulder angle. That makes it a reasonable fit on either a chest or a back day, but not the best pick when the goal is to isolate the lats, where a Cable Straight-Arm Pulldown keeps more of the work on the back.

Because the dumbbell travels from over the chest to behind the head, the movement loads the shoulder in deep flexion, with the lats and chest working under stretch. It usually sits after the main pressing or pulling work as an accessory, done with moderate loads and controlled reps rather than heavy sets. The elbows hold one slight bend from start to finish, so all the movement happens at the shoulder; bending and straightening the elbows turns it into a triceps extension.

The Dumbbell Pullover suits lifters who already press and row with good control and can raise their arms fully overhead while lying down without the lower back lifting off the bench. Anyone short of that range can start with a light dumbbell and a shorter arc, or train the same pattern with a Cable Pullover, while building overhead mobility.

Muscles Worked

MuscleActivation

Latissimus Dorsi: Primary
Pectoralis Major: Primary
Serratus Anterior: High
Teres Major: High
Deltoid: Medium
Triceps Brachii (Long Head): Medium
Erector Spinae: Low
Lower Trapezius: Low
Rectus Abdominis: Low
Rhomboid Major: Low
Triceps Brachii (Lateral Head): Low
Triceps Brachii (Medial Head): Low

Instructions

Sit on the end of a flat bench with one dumbbell standing on your thigh, then lie back along the bench with your head supported and your feet flat on the floor.
Hold the dumbbell vertically with both hands, palms pressed against the underside of the top plate and thumbs wrapped around the handle.
Press the dumbbell up over your chest with your arms nearly straight and a slight bend in the elbows.
Brace your abs so your ribs stay down and your lower back stays on the bench.
Keeping the elbow angle fixed, lower the dumbbell back over your head in a slow arc until your upper arms are roughly in line with your torso and you feel a stretch in your lats and chest.
Pull the dumbbell back along the same arc to the starting position over your chest without changing the bend in your elbows.
Repeat for the desired number of reps, then lower the dumbbell to your chest before sitting up.

Common Mistakes

Using too much weight
Lifting excessively heavy dumbbells can compromise form and increase injury risk.
Overextending the arms
Bringing the dumbbell too far behind the head can strain the shoulders and cause discomfort.
Arching the lower back
Allowing the lower back to lift off the bench reduces core engagement and increases the risk of injury.
Locking the elbows
Fully straightening the arms puts extra stress on the elbows, so keep a slight bend throughout the set.
Bending and straightening the elbows
Changing the elbow angle during each rep turns the pullover into a triceps extension and takes work away from the chest and lats.

Injuries

Dumbbell Pullover is a medium risk exercise when performed with proper technique. The dumbbell is held at arm's length over the face and lowered into deep shoulder flexion, the position most likely to irritate a shoulder with impingement, rotator cuff or labral problems. Anyone with a history of those should check with a clinician before loading it.

The shoulder is the main strain point, especially when the dumbbell is lowered past the range the joint can control or is too heavy to stop smoothly at the bottom. The lower back is the second: when overhead mobility runs out, the ribs flare and the lower back arches off the bench to fake the extra range. Keep the elbow angle fixed with a slight bend, brace the abs so the ribs stay down, and stop the arc where the upper arms are roughly in line with the torso, or sooner if the shoulders complain. Hold the dumbbell firmly by the top plate, since it passes over the face on every rep.

To regress, use a lighter dumbbell and a shorter arc, or train the lats through a similar path with a Cable Straight-Arm Pulldown, which keeps the arms out of the deep overhead position. Add load slowly and only once every rep reaches the same depth under control. Stop the set if you feel a pinch or sharp pain at the front or top of the shoulder, painful clicking, or strain in the lower back, and shorten the range before trying again.

Overview

Primary Focus: Back and chest
Equipment: Dumbbell and bench
Modality: Strength
Difficulty: Intermediate

Alternative Exercises

Frequently Asked Questions

Q: Can the Dumbbell Pullover expand the rib cage?: No. An adult rib cage does not grow from training, and the stretch felt across the chest comes from the lats, chest and breathing muscles lengthening, not from the ribs changing shape.
Q: Should I do this exercise on chest or back day?: It depends on your focus - perform it on chest day if you want more pec engagement or back day for lat activation.
Q: Can I do this exercise with a barbell instead?: Yes. The Barbell Pullover follows the same arc with the hands apart on the bar, while the dumbbell version keeps the hands together under one plate and needs only a single dumbbell. Use whichever lets you control the full range without shoulder discomfort.
Q: How far back should the dumbbell go?: Lower it until your upper arms are roughly in line with your torso, or stop sooner if your ribs flare, your lower back lifts off the bench or your shoulders pinch. Range gained by arching the back adds strain without adding work for the chest and lats.
Q: Should my arms be straight or bent?: Keep a slight bend in the elbows and hold that same angle for the whole rep. Locked arms stress the elbows, and bending more at the bottom then straightening on the way up turns the movement into a triceps extension.