Skip to content
Crucible Fit
  • The Crucible
  • The Week
  • Programs
  • Train Your Way
  • Pricing
Get Crucible
  • The Crucible
  • The Week
  • Programs
  • Train Your Way
  • Apple Watch
  • Pricing
  • FAQ
  • Training Guides
Get Crucible
Crucible Fit

A daily functional fitness test for iPhone, Apple Watch and Android. Stations, reps and the Crux, sized to your readiness and your kit.

Download on the App StoreGet it on Google Play

Crucible Fit

  • The Crucible
  • The Week
  • Programs
  • Train Your Way
  • Apple Watch
  • Pricing

Explore

  • Training Guides
  • Exercise Library
  • FAQ
  • Press
  • Support

Legal

  • Terms and Conditions
  • Privacy Policy
  • Consumer Health Data Notice

CRUCIBLE FIT™ and Crux by Crucible Fit are trademarks of Crucible Fit, LLC.

© 2026 Crucible Fit, LLC. All rights reserved. Apple, the Apple logo, iPhone and Apple Watch are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. Google Play and the Google Play logo are trademarks of Google LLC.

  1. Home
  2. /
  3. Exercises
  4. /
  5. Shoulders
  6. /
  7. Dynamic Bird Dog

Exercise guide

Dynamic Bird Dog

  • Beginner
  • Compound
  • Rep-based
  • Lower legs
  • Shoulders
  • Upper legs
  • Waist

The Dynamic Bird Dog is a foundational core stability exercise that improves spinal alignment and balance while simultaneously activating the glutes, deltoids, and deep abdominal stabilizers.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Dynamic Bird Dog demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Obliques
  • Trapezius

Secondary

  • Erector spinae
  • Hamstrings
  • Quadriceps

Equipment

  • Body weight

Setup

  1. Begin on all fours in a quadruped position on a flat surface or mat.
  2. Place your wrists directly under your shoulders and your knees directly under your hips.
  3. Maintain a neutral spine and engage your core by pulling your navel toward your spine.
  4. Distribute your weight evenly across your hands and knees.

How to do it

  1. Simultaneously extend your right arm forward and your left leg backward until both are parallel to the floor, exhaling as you reach.
  2. Hold the peak extension for one second, focusing on creating a straight line from your fingertips to your heel.
  3. Inhale as you slowly return to the starting position with controlled tempo.
  4. Repeat the movement on the opposite side (left arm and right leg) and continue alternating sides.

Form checklist

  • Keep your hips and shoulders square to the floor throughout the entire movement.
  • Avoid arching your lower back or flaring your ribs as you extend your limbs.
  • Keep your neck in a neutral position by looking at the floor slightly ahead of your hands.
  • Flex your foot (toes toward shin) on the extended leg to better engage the glutes.

Pro tips

  • Focus on 'reaching' for opposite walls rather than lifting your limbs high to maximize spinal decompression and core tension.
  • Squeeze the glute of the extended leg at the top of the movement to ensure the lift comes from the hip rather than the lower back.

Make it harder

  • Add a 'crunch' phase by bringing your elbow and knee together under your torso between extensions without touching the floor.
  • Perform the movement from a high plank position or with your knees hovering an inch off the ground to significantly increase the stability demand.

Frequently asked

What muscles does the dynamic bird dog work?
The dynamic bird dog primarily targets the abs, obliques, and trapezius, and also works the erector spinae, hamstrings, and quadriceps as secondary muscles.
What equipment do you need for the dynamic bird dog?
The dynamic bird dog requires no equipment — just your body weight.
Is the dynamic bird dog good for beginners?
Yes. The dynamic bird dog is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • Ardha Matsyendrasana Yoga PoseIntermediate · abs, glutes, obliques, and trapezius
  • Band Standing Single Arm Twist RowIntermediate · abs, lats, obliques, and trapezius
  • Bear Walk To Rolling RockIntermediate · abs, hamstrings, obliques, and trapezius
  • Double Plank Jack To 4 Mountain ClimberIntermediate · abs, obliques, and trapezius

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

Download on the App StoreGet it on Google Play

See how a Crucible works