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. Core & Abs
  6. /
  7. Band Kneeling Crunch

Exercise guide

Band Kneeling Crunch

  • Beginner
  • Compound
  • Rep-based
  • Waist

The Band Kneeling Crunch provides constant tension throughout the range of motion to effectively isolate the rectus abdominis. By using a resistance band, you can easily adjust the load to build core strength and abdominal thickness without the spinal compression of heavy weighted machines.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Band Kneeling Crunch demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs

Secondary

  • Erector spinae

Equipment

  • Resistance band

Setup

  1. Loop a resistance band around a high point on a power rack.
  2. Kneel on the floor facing away from the anchor point, positioned far enough forward to create initial tension.
  3. Grasp the band with both hands and pull it down so your hands are positioned against your temples or upper chest.
  4. Position your knees hip-width apart and sit back slightly, but keep your hips high and locked in place.

How to do it

  1. Exhale and contract your abdominals to curl your torso downward, bringing your elbows toward your mid-thighs.
  2. Focus on rounding your spine and 'tucking' your ribcage toward your pelvis rather than hinging at the hips.
  3. Pause for one second at the bottom of the movement to emphasize the peak contraction.
  4. Inhale as you slowly return to the starting position, resisting the band's pull to maintain control.

Form checklist

  • Keep your hips stationary; do not sit back onto your heels as you crunch.
  • Ensure the movement comes from spinal flexion (rounding the back), not pulling with the arms.
  • Maintain a tucked chin to keep the neck in a neutral, safe position.
  • Keep your hands fixed relative to your head throughout the entire set.

Pro tips

  • Think about trying to touch your sternum to your belly button to maximize the shortening of the abdominal fibers.
  • Maintain a slight glute squeeze to stabilize the pelvis, which prevents the hip flexors from taking over the movement.

Make it harder

  • Increase the distance from the anchor point to create higher peak tension at the bottom of the rep.
  • Incorporate a slight diagonal rotation at the bottom of the crunch to increase oblique recruitment.

Frequently asked

What muscles does the band kneeling crunch work?
The band kneeling crunch primarily targets the abs, and also works the erector spinae as secondary muscles.
What equipment do you need for the band kneeling crunch?
The band kneeling crunch uses resistance band.
Is the band kneeling crunch good for beginners?
Yes. The band kneeling crunch is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • 3/4 Sit-UpBeginner · abs and obliques
  • 45 Degree Bicycle Twisting CrunchIntermediate · abs and obliques
  • 45 Degree Lean Back Alternate Knee RaiseBeginner · abs and obliques
  • 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals

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