Fysiqal
Balance
Balance

Bird-Dog

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core-stabilityanti-rotationbird-dogquadrupedlumbar-stabilityneuromotor

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Exercise demo
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From hands-and-knees, extend the opposite arm and leg while keeping the spine perfectly still — a contralateral coordination and anti-rotation core-stability staple.

Detail

Start on hands and knees (quadruped): hands under shoulders, knees under hips, spine in neutral (see Spine Positioning — "S" Shape, Never "C"), and brace the core (Abdominal Bracing (vs Hollowing)). Slowly extend one arm forward and the opposite leg backward until both reach roughly horizontal, without letting the lower back arch, sag, or rotate. Hold briefly, return under control, and alternate sides.

The drill demands that the trunk resist rotation and extension as the contralateral limbs load it asymmetrically (anti-rotation/anti-extension; see Anti-Movement Core Training (Anti-Extension, Anti-Rotation, Anti-Lateral-Flexion)), while training contralateral coordination (Coordination) and the posterior chain (Erector Spinae (Sacrospinalis), multifidus, Gluteus Maximus). A common cue: balance an imaginary cup of water on the low back so the pelvis stays level.

Coaching:

  • Keep the hips square to the floor — the most common fault is the pelvis rotating up on the extending-leg side.
  • Move slowly; the goal is control, not range or speed.
  • McGill-style dosing favors short holds (e.g., ~7–8 s) for repeated quality reps rather than long single holds — verified 2026-09-05: this specific figure traces to McGill's coaching progression (Ultimate Back Fitness and Performance), not a number stated in the 2009 APMR paper itself; a pyramid progression (e.g., 5 reps at 7-8s, building toward 8-10s) favoring many quality short holds over one long fatiguing hold.

Progressions (see Balance Training Progression): add a small "draw a square" with the extended limbs; add a band/resistance; perform from a plank/quadruped on an unstable surface. Regression: extend only the leg (or only the arm) first, keeping the other limbs grounded.

Key facts

  • Quadruped; extend opposite arm + leg to horizontal with a still, neutral spine.
  • Trains anti-rotation/anti-extension core stability + contralateral coordination + posterior chain.
  • Keep hips square (don't let the pelvis rotate); move slowly.
  • Common dosing: short ~7–8 s holds, multiple quality reps per side.
  • Progress: add limb "squares," resistance, or instability; regress to single-limb.

Connections

Sources

Cited in text — not yet linked
Verified/updated 2026-09-05: McGill SM, Karpowicz A. "Exercises for spine stabilization: motion/motor patterns, stability progressions, and clinical technique." Arch Phys Med Rehabil 2009;90(1):118-126 (the "Big 3" primary paper naming bird-dog as one of the three) — see Anti-Movement Core Training (Anti-Extension, Anti-Rotation, Anti-Lateral-Flexion) for the full citation set.

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Atlas Connections

Erector Spinae (Sacrospinalis)
Three muscle-group columns (iliocostalis, longissimus, spinalis) running skull-to-sacrum that extend, laterally flex, and rotate the vertebral column.
Gluteus Maximus
The strongest, largest muscle in the body; the primary hip extensor and a lateral rotator of the femur.
Anti-Movement Core Training (Anti-Extension, Anti-Rotation, Anti-Lateral-Flexion)Closely related
Train the core by resisting motion the limbs or a load try to impose — anti-extension, anti-rotation, and anti-lateral-flexion — rather than by repeatedly flexing the spine.
Balance Training Progression
Make balance harder by shrinking or destabilizing the base of support and removing sensory inputs — a staircase from two-feet stable to single-leg, eyes-closed, unstable-surface, and perturbation work.
Abdominal Bracing (vs Hollowing)Closely related
Stiffening the whole trunk wall — like bracing for a punch — to lock the spine in neutral and create a rigid base for the limbs to work from; the foundational core-stability skill.
Coordination
The ability to combine movements of several body parts smoothly, accurately, and in the right sequence and timing — the quality that makes a complex motion look effortless.
Core Stability vs Core StrengthClosely related
Core strength is how much force the trunk muscles can produce; core stability is the trunk's ability to resist unwanted motion and keep the spine controlled — and for back health and force transfer, stability usually matters more.
Dead BugClosely related
Lie on your back and lower an opposite arm and leg while pinning the low back to the floor — a beginner-friendly anti-extension core-stability drill and the supine partner to the bird-dog.
Spine Positioning — "S" Shape, Never "C"
Stabilize the spine by holding it in a semi-isometric contraction so it keeps its natural "S" shape — never allow a "C"-shaped spine during exercise. This is a coaching cue for loaded lifting, not a literal, universal rule — see "Current nuance" below.