Bird Dog Exercise: How to Do It, Why It’s in Every Physio Plan

The bird dog is named for its appearance: kneeling on all fours, you extend one arm forward and the opposite leg back, like a hunting dog pointing at game. It looks easy and almost always isn’t. Done correctly, it’s the cleanest test of anti-rotational core control there is — you keep a stable spine while diagonal limbs move. It’s the third pillar of Stuart McGill’s "Big 3" core programme used in nearly every Canadian physio practice.

How to do it correctly

Start on hands and knees. Wrists under shoulders, knees under hips. Spine in neutral — not arched, not flexed.

Brace your core (gentle abdominal contraction, like preparing to take a light punch). Keep this throughout.

Slowly extend your right arm forward and your left leg back simultaneously. The extended limbs should be parallel to the floor at the top.

Hold for 5–10 seconds. Lower under control. Switch sides. That’s 1 rep. 8–10 reps per side, 2–3 sets.

The critical cue: your hips and shoulders should not rotate. If a glass of water sat on your lower back, it shouldn’t spill.

Why it’s in every physio plan

Stuart McGill’s "Big 3" (bird dog, side plank, modified curl-up) is the most-cited core programme in chronic-low-back-pain rehabilitation. The bird dog specifically trains spine sparing: holding the spine still while limbs move, which mirrors how almost every real-world activity actually loads the back.

A 2017 systematic review (Journal of Orthopaedic & Sports Physical Therapy) found that McGill’s Big 3 produces equivalent or superior outcomes to general core-strengthening programmes for chronic low back pain, with lower spinal compression load.

The bird dog also trains the gluteus medius and contralateral lats — secondary muscles that most low-back patients have weak.

Common mistakes

Hip rotation. When you lift the leg, the same-side hip wants to rotate up. Force it to stay square to the floor. This is the test the exercise is designed for.

Lumbar arching. When the leg extends, the lower back wants to arch to compensate. Brace the core throughout to prevent this.

Looking up. Cervical extension to look forward forces the spine into hyperextension. Keep your gaze 30–60 cm in front of your hands; ears in line with the spine.

Going too fast. The bird dog is a tempo movement — 5+ seconds per rep, with a 5–10 second hold at the top. If you’re bouncing through it, you’re training momentum, not stability.

The bottom line

The bird dog looks too simple to matter and is almost universally prescribed in Canadian physiotherapy for a reason: it trains the exact pattern of spine-sparing core control that protects against low-back injury. Add 2–3 sets of 8–10 reps per side to any warm-up, 3×/week. The boring version, done well, is far more useful than fancy variations done badly.

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