Bird Dog
What Is the Bird Dog?
Bird Dog is a compound exercise that primarily targets the core and also engages the lower back, glutes and shoulders. It is a beginner-level movement performed on hands and knees: you reach one arm forward and the opposite leg back, hold briefly while your spine stays still, then return and switch sides.
The bird dog is one of the most widely used spine-stability exercises in rehab clinics and gyms, and it is best known as one of Stuart McGill's "Big Three" alongside the curl-up and the side plank. Its job is to teach the trunk to stay still while the arms and legs move, which is why it shows up in back-rehab programs, warm-ups and general core routines rather than as a strength builder in its own right.
The work is shared between the back of the body and the abdominal wall. A study of 30 healthy young adults found the deep muscles along the lower spine and the glute of the lifted leg were the most active during the hands-and-knees leg lift and arm-and-leg lift, with the obliques also working hard to stop the body from twisting and the rectus abdominis staying low. Lifting only the leg or only the arm makes it easier, while slowing the movement down or doing it from a high plank makes it harder.
It suits almost anyone, from beginners learning to brace their trunk to lifters using it as a warm-up before squats and deadlifts. If you wobble as soon as a hand and a knee leave the floor, start by lifting one limb at a time, and pair it with the Dead Bug, which trains the same opposite-arm, opposite-leg pattern lying on your back. Once it feels easy, the Plank and Side Plank round out the same stability work.
Muscles Worked
- Erector Spinae
- Primary
- External Oblique
- Primary
- Gluteus Maximus
- Primary
- Gluteus Medius
- High
- Biceps Femoris
- Medium
- Deltoid
- Medium
- Lower Trapezius
- Medium
Instructions
- Start on your hands and knees with your hands directly under your shoulders, your knees under your hips and your arms straight.
- Set your back flat from head to tailbone, with your gaze on the floor just ahead of your hands.
- Brace your abs as if preparing for a light poke in the stomach, and keep breathing.
- Reach one arm straight forward and, at the same time, extend the opposite leg straight back, pushing through the heel.
- Lift the arm and leg until they are roughly in line with your body, keeping both hip bones facing the floor.
- Hold for a few seconds without letting your back arch or your hips shift to one side.
- Lower the hand and knee back to the floor under control, returning to the start position.
- Repeat with the other arm and the opposite leg, alternating sides for the set.
Common Mistakes
Lifting the leg too high
Raising the leg above hip level arches the lower back, so stop when the leg is in line with your body.
Twisting the pelvis
Letting the hip of the raised leg roll up toward the ceiling means the trunk is rotating instead of resisting rotation, so keep both hip bones facing the floor.
Letting the back sag
Dropping the belly toward the floor puts the lower back into extension, so brace your abs and keep the spine flat from head to tailbone.
Shifting sideways
Leaning the whole body over the supporting hand and knee to keep your balance hides the stability work the exercise is meant to train.
Rushing the reps
Swinging the arm and leg up and down quickly uses momentum and skips the brief, controlled hold where the trunk does its work.
Holding your breath
Holding your breath to stay steady makes the brace hard to keep up across a set, so breathe steadily while your abs stay tight.
Injuries
Bird Dog is a low risk exercise when performed with proper technique. The spine stays still while the limbs do the moving, which keeps the load on the lower back low. A study that measured lower-back load in 13 young men found that lifting a leg while holding the spine still kept spine load low, adding the opposite arm raised the demand, and exercises that arch the whole trunk up loaded the spine the most.
The lower back is the main strain point when the leg is lifted too high, which arches the spine, or when the pelvis rolls open to one side. Keep your hands under your shoulders and your knees under your hips, brace your trunk before you lift, and raise the arm and leg only until they are in line with your body. Kneeling on a mat or a folded towel spares the knees, and resting on your knuckles can ease sensitive wrists.
If you cannot lift the arm and leg together without rocking, lift only the leg or only the arm, or try the Dead Bug. To progress, add reps rather than much longer holds, draw small squares with the raised hand and foot, or move to the high-plank version. Stop if the exercise causes sharp pain in your lower back, or pain, numbness or tingling that travels into a leg.
- Primary Focus
- Core
- Equipment
- Body weight
- Modality
- Strength
- Difficulty
- Beginner
Alternative Exercises
Other Names for the Bird Dog
The Bird Dog is also known as:
- Quadruped Opposite Arm and Leg Raise
Frequently Asked Questions
- Q: Is the bird dog good for lower back pain?
It is one of the most common exercises in back-rehab programs because it trains the back and trunk muscles while the spine stays still and lightly loaded. It is not a cure on its own, so if you have back pain, follow your clinician's plan and stop if it brings on your usual pain.
- Q: How long should I hold each rep?
Hold for a few seconds, and no more than about 10, then switch sides. Build up by adding reps rather than by holding each rep longer.
- Q: How high should I lift my arm and leg?
Lift them until they are roughly in line with your torso. Going higher usually means your lower back is arching or your pelvis is twisting, which takes the work away from the trunk.
- Q: What is the difference between the bird dog and the dead bug?
Both train your trunk to stay still while the opposite arm and leg move. The bird dog is done face down on hands and knees and leans more on the back muscles and glutes, while the Dead Bug is done on your back and puts more of the work on the abdominals.
- Q: How can I make the bird dog harder?
Slow the lift down, draw small squares with your raised hand and foot, or do it from a high plank on your hands and toes instead of your knees. Each option makes it harder to keep your hips and spine still.