How to Do It
- Start on hands and knees with wrists under shoulders, knees under hips and the back in a relaxed neutral position.
- Brace lightly so the ribs and pelvis stay still.
- Reach one arm forward and the opposite leg back until both are roughly in line with the torso.
- Hold for a few seconds with the hips level and the gaze down between the hands.
- Return the arm and leg slowly to the floor, reset, and repeat on the other side.
Common Mistakes
- Rotating the pelvis upward on the side of the lifted leg to reach higher.
- Lifting the leg above hip height so the lower back arches.
- Craning the head up to look forward instead of keeping the neck long.
- Rushing through reps without a pause at the top.
Brace on hands and knees, extend the opposite arm and leg without rotating the pelvis, then return slowly. Keep the range controlled, adjust the load when technique changes, and stop or seek qualified advice if an exercise causes persistent pain.
McGill Big 3 Biomechanics, Cross-Body Sling Stability, and Spinal Sparing
The bird dog is one of Stuart McGill’s “Big Three” core exercises, used to train the trunk muscles to hold the spine still while the limbs move. In a lab study, leg extension from hands and knees with the spine held still produced low lower-back loads compared with exercises that actively arch the back, and adding the opposite arm made the exercise more demanding. Reaching with the opposite arm and leg also asks the glute on one side and the back and shoulder muscles on the other to work together to keep you from twisting.
To calibrate your bird dog execution:[1][2][3]
- Quadruped Base Setup: Start on hands and knees on an exercise mat. Place your wrists directly under your shoulders and your knees directly under your hips. Maintain a neutral spine with a slight natural inward curve in the lower back (do not round or sag).[1][2][3]
- Contralateral Reach: Simultaneously reach your right arm straight forward (thumb pointing up toward the ceiling) while extending your left leg straight backward (driving back through the heel with foot dorsiflexed).[1][2][3]
- The Anti-Rotation Standard: Raise the limbs only until they are parallel with your torso and the floor. Squeeze your glute and lat, holding the peak isometric extension for 3 to 5 seconds. Keep your hips level with the floor; imagine balancing a glass of water on your lower back.
- Controlled Return & Sweep: Return the arm and leg under control over 2 seconds, lightly touching the floor (or sweeping the elbow to meet the knee) before immediately resetting for the next repetition.[1][2][3]
Programming & Volume Guidelines
A sensible starting point for core endurance and control:
- Target Range: 3 sets using a descending pyramid protocol (e.g. 5 reps per side on set 1, 3 reps per side on set 2, 2 reps per side on set 3) with a strict 3-to-5-second hold on every single rep.[1][2][3]
- Frequency: Its low load makes it easy to include most days, for example in a warm-up or a core circuit.
- Progression: Increase hold duration up to 8-10 seconds per rep, or perform subtle square drawing/sweeps at peak extension before adding light ankle/wrist weights.[1][2][3]
Common Mistakes & Troubleshooting
- Pelvic Rotation (Hip Tilting): Rotating the hip upward on the kicking leg to reach higher removes the anti-rotation challenge. Keep both hip points pointing directly toward the floor.
- Lumbar Hyperextension (Kicking Too High): Raising the leg above horizontal usually makes the lower back arch. Lift the leg using only glute extension, stopping when parallel with the torso.
- Head Jutting Upward: Looking up toward the wall bends the neck back and makes it harder to keep the spine in line. Keep your gaze directed straight down at the floor between your hands.
- Rushing Repetitions: Fast kicks turn a control drill into momentum. Maintain a strict 3-to-5-second hold on every repetition.
References
See our exercise methodology for how this evidence is applied and its limits.
Frequently Asked Questions
- What muscles does the bird dog exercise work?
- The bird dog trains the back extensors (erector spinae and multifidus), gluteus maximus and hamstrings on the side of the raised leg, while the abdominals and obliques work to stop the trunk from twisting. The shoulder and upper-back muscles hold the raised arm in place.
- Why is the bird dog recommended for lower back pain?
- It is often included in back-care programmes, including Stuart McGill's 'Big Three', because it trains the trunk muscles to hold a still spine without bending or twisting. In a lab study of 13 young men, lifting a leg from hands and knees with the spine held still produced low lower-back loads compared with exercises that actively arch the back. It is not a treatment on its own, so if you have back pain, follow advice from a clinician who has assessed you.
- How high should you lift your leg in a bird dog?
- Lift your leg only until it forms a straight line parallel to your torso and the floor. Lifting the leg higher than that usually tips the pelvis forward and arches the lower back, so the reach comes from the back rather than the hip.
- How long should you hold each bird dog repetition?
- A hold of about 3 to 6 seconds per rep is a good starting point. Short holds repeated for several reps make it easier to keep the hips level than one long hold, and you can lengthen the hold as control improves.
- How do you make the bird dog exercise more challenging?
- Progress the bird dog by drawing small squares in the air with your outstretched hand and foot at peak hold, or by lifting your knees just off the floor into a bear-position bird dog, which makes it much harder to keep the hips from rotating.