How should I hold the dumbbell?

Hold one dumbbell behind your head with both hands so it rests against your upper back, just below the neck, with your elbows pointing forward. Keep it pinned there for the whole set so it cannot roll or press into the back of your neck as your torso tips forward.

How heavy should the dumbbell be?

Lighter than you would use for a Dumbbell Romanian Deadlift. The weight sits at the top of your torso, so it works on a long lever at the bottom of the rep, and the practical limit is usually how much you can hold steady behind your head. When a heavier dumbbell becomes awkward to hold, move on to the Barbell Good Morning.

How far forward should I bend?

Lower until your torso is close to parallel with the floor or your hamstrings reach a strong stretch, whichever comes first. If your lower back starts to round before that, end the rep higher and let the depth come as your hamstring flexibility improves.

Is the Dumbbell Good Morning or the Romanian deadlift better for the hamstrings?

Both train the same hinge, but the Romanian deadlift usually lets you lift more and works the hamstrings harder. In a study of weight-trained men lifting 85 percent of their one-rep max, hamstring activity was highest in the Romanian deadlift and the glute-ham raise out of four exercises that also included the good morning and the leg curl. The good morning earns its place as a lighter accessory that also builds strength in the lower back.

Can I do good mornings with two dumbbells?

Yes. A common alternative is to rest one dumbbell on each shoulder, with one end in front and one behind, which loads the same hinge without holding your arms behind your head. It can be a better fit if the behind-the-head hold bothers your shoulders.

Dumbbell Good Morning

What Is the Dumbbell Good Morning?

Dumbbell Good Morning is a compound exercise that primarily targets the hamstrings and also engages the glutes, spinal erectors and core. It is an intermediate-level movement in which you hold a single dumbbell behind your head, hinge forward at the hips with nearly straight legs until your torso approaches parallel with the floor, then drive your hips forward to stand back up.

The good morning trains the hip hinge with the weight carried at the top of the torso instead of in the hands. At the bottom of the rep the dumbbell sits far from the hips, so even a modest weight asks a lot of the hamstrings, glutes and lower back. That makes the dumbbell version a practical way to load the movement without a squat rack, and a lighter step toward the Barbell Good Morning.

The hamstrings do most of the work, lengthening under load as the hips travel back and then pulling the torso upright, with the gluteus maximus joining in strongly to finish the hip extension. The erector spinae work isometrically throughout to hold the spine flat against the weight. A slightly softer knee bend, held fixed through the rep, lets the hips travel further and shares more of the work with the glutes, while straighter legs keep the emphasis on the hamstrings but shorten the range. Compared with the Dumbbell Romanian Deadlift, where the weights hang close to the legs, the good morning demands more from the lower back at the same load.

It suits lifters who can already hinge with a flat back and hold their arms comfortably behind their head. If your lower back rounds before your torso gets near parallel, build the pattern first with the Bodyweight Good Morning or the Band Good Morning. The exercise usually works best as an accessory after the main squat or deadlift work of a lower-body session, with a controlled tempo and moderate to high reps.

Muscles Worked

MuscleActivation

Biceps Femoris: Primary
Semimembranosus: Primary
Semitendinosus: Primary
Erector Spinae: High
Gluteus Maximus: High
Adductor Magnus: Medium
Deltoid: Low
External Oblique: Low
Rectus Abdominis: Low
Upper Trapezius: Low

Instructions

Stand with your feet about hip-width apart and your toes pointing forward.
Hold one dumbbell behind your head with both hands, resting it against your upper back just below your neck, elbows pointing forward.
Brace your core and keep your head in line with your spine.
Unlock your knees into a slight bend and keep that angle for the whole set.
Push your hips straight back and let your torso tip forward, keeping your back flat and the dumbbell pinned in place.
Lower until your torso is close to parallel with the floor or your hamstrings reach a strong stretch, stopping before your lower back rounds.
Squeeze your glutes and drive your hips forward to bring your torso back up.
Finish standing tall with your hips fully extended, without leaning back, then start the next rep.

Common Mistakes

Rounding the lower back
Letting the lower back round at the bottom moves the load off the hamstrings and onto the spine.
Turning it into a squat
Bending the knees further as you lower lets the hips drop and shifts the work from the hamstrings to the quads.
Locking the knees
Standing on fully locked knees pulls the hamstrings tight early, so the lower back rounds sooner and takes over the work.
Letting the dumbbell sink onto the neck
A dumbbell that slides down onto the back of the neck presses on the cervical spine instead of resting on the upper back.
Looking up at the bottom
Lifting the chin to look ahead bends the neck back while it is already working against the hold.
Dropping into the bottom
Falling into the stretch and bouncing out of it loads the hamstrings and lower back abruptly at their longest point.

Injuries

Dumbbell Good Morning is a medium risk exercise when performed with proper technique. The lower back takes the most strain, because the weight sits high on the torso and the spine has to stay flat against a long lever at the bottom of each rep. The hamstrings are the other common strain point, especially when you bounce out of the bottom or push past your available range. The behind-the-head hold adds its own risks: a dumbbell that sinks onto the back of the neck presses on the cervical spine, and one that is too heavy can slip or drag the head forward.

Start with a light dumbbell you can keep steady behind your head for the whole set, and rehearse the hinge with no weight first. End each rep where your hamstrings reach their limit rather than where your lower back starts to round, keep the knee bend fixed, and lower under control. If the hold bothers your shoulders or neck, the Dumbbell Romanian Deadlift trains the same hinge with the weights in your hands.

Regress to the Bodyweight Good Morning or the Hyperextension while you learn to keep your back flat, and progress to the Barbell Good Morning once a heavier dumbbell becomes awkward to hold. Stop the set if you feel sharp lower-back pain, pain or tingling running down a leg, a sudden pull in a hamstring, or neck pain. Anyone with a history of disc problems or chronic low back pain should check with a qualified professional before loading this movement.

Overview

Primary Focus: Hamstrings
Equipment: Dumbbell
Modality: Strength
Difficulty: Intermediate

Alternative Exercises

Frequently Asked Questions

Q: How should I hold the dumbbell?: Hold one dumbbell behind your head with both hands so it rests against your upper back, just below the neck, with your elbows pointing forward. Keep it pinned there for the whole set so it cannot roll or press into the back of your neck as your torso tips forward.
Q: How heavy should the dumbbell be?: Lighter than you would use for a Dumbbell Romanian Deadlift. The weight sits at the top of your torso, so it works on a long lever at the bottom of the rep, and the practical limit is usually how much you can hold steady behind your head. When a heavier dumbbell becomes awkward to hold, move on to the Barbell Good Morning.
Q: How far forward should I bend?: Lower until your torso is close to parallel with the floor or your hamstrings reach a strong stretch, whichever comes first. If your lower back starts to round before that, end the rep higher and let the depth come as your hamstring flexibility improves.
Q: Is the Dumbbell Good Morning or the Romanian deadlift better for the hamstrings?: Both train the same hinge, but the Romanian deadlift usually lets you lift more and works the hamstrings harder. In a study of weight-trained men lifting 85 percent of their one-rep max, hamstring activity was highest in the Romanian deadlift and the glute-ham raise out of four exercises that also included the good morning and the leg curl. The good morning earns its place as a lighter accessory that also builds strength in the lower back.
Q: Can I do good mornings with two dumbbells?: Yes. A common alternative is to rest one dumbbell on each shoulder, with one end in front and one behind, which loads the same hinge without holding your arms behind your head. It can be a better fit if the behind-the-head hold bothers your shoulders.