Bird Dog

Anton YefanovUpdated September 6, 2026

The bird dog is performed on hands and knees, extending one arm forward and the opposite leg back while the spine stays neutral. Nothing about the trunk is supposed to move, which is the point: the rectus abdominis and transverse abdominis resist extension while the obliques resist the rotation created by the offset limbs. The erector spinae work alongside them to hold the segment in place, and the glute of the extended leg produces the hip extension. Range is dictated by control, so the limbs only travel as far as the low back can stay still.

How to do the Bird Dog

Kneel on a mat and set each hand below its shoulder and each knee below its hip.
Brace your abdominals and set your spine flat with your neck in line with your back.
Extend one leg straight behind you until it is roughly parallel to the floor.
At the same time reach the opposite arm forward to shoulder height, keeping the hips level.
Hold briefly while resisting any rotation through the pelvis.
Return the hand and knee to the floor under control, then repeat on the other side.

Muscles worked

Primary:: Core and Lower back
Secondary:: Glutes and Shoulders

Why train it

Trains the trunk to stay stable while the arms and legs move independently.
Requires no equipment and no floor space beyond a mat, so it suits home programming.
Loads the spine lightly, which makes it usable early in low back conditioning.

Common mistakes

Letting the hips rotate toward the lifted leg, which removes the anti-rotation demand entirely.
Lifting the leg above hip height, which arches the lower back instead of loading the core.
Letting the chest sag between the shoulder blades, which shifts support onto the shoulder joints.
Rushing the reps, which replaces core control with momentum and balance corrections.

Frequently asked questions

Bird dog vs dead bug: what is the difference?

They train the same skill, keeping the spine still while the arms and legs move, from opposite positions. The bird dog is done on hands and knees and works the back muscles and glutes more. The dead bug is done on your back and works the front of the core more. Both are good, and many programs use both.

Is the bird dog good for lower back pain?

Yes. It is one of the three core exercises spine researcher Stuart McGill recommends for back health, because it trains the back muscles with very little load on the spine. Move slowly, keep your hips level, and do not lift your leg higher than your hip.

How do you do the bird dog correctly?

Start on hands and knees, with hands under shoulders and knees under hips. Reach one arm forward and the opposite leg back until both are level with your body, then hold for a few seconds. Your hips and shoulders should stay square, as if a glass of water were balanced on your lower back.

Does the bird dog build muscle?

Not much. It is a stability exercise, and the load is too light to build significant muscle size. Its value is control: it teaches your core and glutes to keep your spine steady, which carries over to heavier lifts like deadlifts and squats.

What muscles does the Bird Dog work?

The Bird Dog trains the core and lower back as the main targets. Expect the glutes and shoulders to take some of the load as well.

What equipment do I need for the Bird Dog?

None. The Bird Dog is a bodyweight movement, so your own weight is the resistance and floor space is the only requirement.

Is the Bird Dog suitable for beginners?

Yes. The Bird Dog is rated beginner: you are the load, so there is no weight to get wrong. Add reps or time only once the position holds from the first of them to the last.

Can I do the Bird Dog at home?

Yes, anywhere. There is nothing to buy and nothing to set up, which makes the Bird Dog one of the movements worth keeping for days you never reach a gym.

How many sets and reps of the Bird Dog should I do?

Three sets of 12 to 20 reps, or 30 to 60 seconds for anything you hold. Add load or leverage once the top end feels easy rather than piling on more reps.

What are good alternatives to the Bird Dog?

Cable Side Bend, Dumbbell Side Bend, and Machine Crunch train the same primary muscles as the Bird Dog. Pick whichever one suits the equipment in front of you.