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  7. Downward Dog Crunch

Exercise guide

Downward Dog Crunch

  • Intermediate
  • Compound
  • Rep-based
  • Lower legs
  • Shoulders
  • Upper legs

This compound movement combines the active recovery of Downward Dog with a dynamic core contraction, targeting the entire anterior chain while improving shoulder stability and hip mobility. It is highly effective for developing functional core strength and control through a large range of motion.

Reviewed by the Crucible team · Updated June 2026

Watch the Downward Dog Crunch demonstrationGuided video and your full workout live in the Crucible app.

Muscles worked

Primary

  • Abs
  • Deltoids
  • Obliques
  • Pectorals

Secondary

  • Calves
  • Hamstrings

Equipment

  • Body weight

Setup

  1. Start in a high plank position with hands shoulder-width apart and feet hip-width apart.
  2. Push your hips back and up into a Downward-Facing Dog, creating an inverted 'V' shape with your body.
  3. Lift your right leg straight back and up into a Three-Legged Dog position to begin the first rep.

How to do it

  1. Exhale as you shift your weight forward into a plank, pulling your lifted knee toward your chest or nose.
  2. Contract your abs hard at the peak of the movement, rounding your upper back slightly to maximize the crunch.
  3. Inhale as you push your hips back and return to the Three-Legged Dog position, extending the leg high.
  4. Complete the set on one side before switching, or alternate legs by returning the foot to the floor between reps.

Form checklist

  • Keep your core braced and avoid letting your hips sag below neutral during the plank phase.
  • Press firmly through the palms to keep the shoulders active and stable.
  • Drive the knee as close to the chest as possible to ensure full abdominal recruitment.
  • Maintain a neutral neck, looking toward your hands during the crunch and back toward your feet in Downward Dog.

Pro tips

  • Focus on 'protracting' your shoulder blades—pushing the floor away—at the top of the crunch to engage the serratus anterior.
  • Slow down the transition from the extension to the crunch to eliminate momentum and force the core to do the work.

Make it harder

  • Add a 3-second hold at the peak of the crunch to increase time under tension.
  • Rotate the knee toward the opposite elbow during the crunch phase to increase oblique activation.

Frequently asked

What muscles does the downward dog crunch work?
The downward dog crunch primarily targets the abs, deltoids, obliques, and pectorals, and also works the calves and hamstrings as secondary muscles.
What equipment do you need for the downward dog crunch?
The downward dog crunch requires no equipment — just your body weight.
Is the downward dog crunch good for beginners?
The downward dog crunch is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals
  • Bosu Ball Plank HoldIntermediate · abs, deltoids, obliques, and pectorals
  • Explosive Dynamic PlankIntermediate · abs, deltoids, obliques, and pectorals
  • Knee Tap Sky ReachIntermediate · abs, calves, deltoids, obliques, and pectorals

Train this with a plan, not guesswork

Crucible builds the downward dog crunch into a precise program around your body, equipment, location, and time.

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