Pilates Crab: How to Do It and Muscles Worked

How to do the Crab

Sit on your mat with your knees bent, cross your ankles, and grab your feet with your hands. Pull your knees close to your shoulders and round your spine into a tight ball.

1. Tuck your chin toward your chest to maintain spinal flexion.
2. Roll backward onto your upper back while keeping your legs crossed and your hands on your feet.
3. Switch the cross of your legs while you are balanced on your upper back.
4. Roll forward using your abdominal muscles to control your momentum.
5. Continue rolling forward over your crossed legs until the top of your head gently touches the mat.
6. Keep your neck long and avoid putting actual weight onto your head.
7. Roll backward again to repeat the sequence.

• Breath. Teachers cue breathing differently, but a common pattern is to inhale as you roll backward and exhale as you roll forward. Some instructors may ask you to reverse this pattern to challenge your control.
• Where you feel it. You should feel intense work in your deep abdominals to keep your spine round. You should not feel pain or heavy pressure in your neck or the top of your head.
• How many. 4 to 6 continuous repetitions

Common mistakes

• Flattening the back. Keep your rectus abdominis and transversus abdominis engaged to maintain spinal flexion. If your back flattens, you will clunk onto the mat instead of rolling smoothly.
• Putting weight on the head. The head touch should be a gentle tap, not a weight-bearing resting point. Use your abdominal control to stop your forward momentum.
• Using momentum over muscle. Avoid throwing your upper body backward to start the roll. Initiate the movement by deepening your abdominal scoop.
• Letting go of the feet. Keep your hands securely on your feet throughout the entire exercise. This helps maintain the tight ball shape and engages your hip flexors.

Make it easier or harder

Easier

• Rolling Like a Ball to practice the basic rolling motion
• Holding the crossed-leg balance position without rolling
• Rolling backward but omitting the forward head touch entirely

Who should be careful

• If you have osteoporosis or low bone density, or a recent disc injury, ask your clinician whether repeated loaded forward bending of the spine suits you. Many bone health organizations recommend limiting it.
• Rolling on the spine is not a good idea with osteoporosis, a bony or sensitive spine, or a recent back injury. Use a thick mat, or hold the balance without rolling.
• Lifting the head for a long time can strain the neck. Rest the head on the mat or support it with one hand when the neck tires.
• This is an advanced exercise. Build the strength and control from the simpler versions first, ideally with a qualified teacher watching.

Related exercises

• Seal Beginner to intermediate
• Boomerang Advanced
• Roll Over Advanced
• Chest Lift Beginner
• Corkscrew Intermediate to advanced

When to see a doctor or physical therapist

• Sharp pain in your neck or cervical spine
• Dizziness or lightheadedness when rolling
• Pinching sensations in your lower back
• Sudden pain in your hip flexors or groin

This page is general education, not a diagnosis or treatment plan. If you have a health condition, are pregnant or are recovering from an injury or surgery, check with your own clinician before trying new exercises.

How we put this page together. Exercise data (type, level, equipment and muscles) was compiled by our editors from the classical mat order in Joseph Pilates’ 1945 book and from commonly taught mat repertoire. Muscle lists are a general anatomy guide; cueing differs between teachers. Text drafted with AI assistance and checked by the Editorial Team. See our editorial policy. Last checked October 2026.