The bird dog is a simple bodyweight core exercise done on hands and knees where you extend one arm and the opposite leg in a straight line, then switch sides. It mainly targets your core, lower back, glutes, and hips while challenging balance and stability.

What bird dogs are

  • The bird dog is a core stability move performed from an all‑fours (quadruped) position.
  • You typically extend the right arm and left leg straight out, pause, then return and repeat on the opposite side in a controlled manner.

Key benefits

  • Strengthens core, lower‑back, and glute muscles, which support posture and spinal stability and may help reduce or prevent low‑back pain.
  • Improves balance, coordination, and control because of the opposite‑arm/leg pattern, which mimics natural walking and running mechanics.

How to do a basic bird dog

  1. Start on hands and knees with hands under shoulders and knees under hips, spine in a neutral, straight line.
  1. Brace your core, then slowly reach one arm forward while extending the opposite leg back, keeping hips and shoulders level and not over‑arching the back.
  1. Hold briefly, then return to the start and repeat on the other side for several controlled reps per side.

Common mistakes

  • Letting the lower back sag or excessively arch instead of keeping a stable, neutral spine.
  • Rotating or tipping the hips and shoulders instead of staying square to the floor, which reduces the stability challenge and can strain the back.

Simple variations

  • Easier: Just extend the leg or just the arm, or keep toes lightly on the floor for support.
  • Harder: Add a pause at the top, use a small weight or resistance band, or place an object on your low back and try not to let it fall to increase control demands.

TL;DR: Bird dogs are a low‑impact core stability exercise that help build strong, stable hips and spine, often used in both fitness and back‑rehab programs.