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. Twist Knee Drive

Exercise guide

Twist Knee Drive

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

The Twist Knee Drive is a dynamic standing core exercise that targets the obliques and lower abdominals through controlled rotation and hip flexion, while simultaneously engaging the quadriceps and improving balance.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Twist Knee Drive demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Obliques
  • Quadriceps

Secondary

  • Glutes
  • Hip flexors

Equipment

  • Body weight

Setup

  1. Stand with your feet shoulder-width apart and knees slightly bent for stability.
  2. Place your hands lightly behind your head with elbows flared out (prisoner position) or hold them at chest height.
  3. Engage your core by pulling your belly button toward your spine and maintain an upright posture.

How to do it

  1. Exhale as you drive your right knee up toward your chest while rotating your torso to bring your left elbow toward the rising knee.
  2. Squeeze your obliques at the peak of the movement, ensuring the rotation comes from your midsection rather than just your arms.
  3. Inhale as you lower your foot back to the floor and return your torso to the center with control.
  4. Repeat the movement on the opposite side, alternating legs for each repetition at a steady, controlled tempo.

Form checklist

  • Rotate through your spine rather than just pulling your elbows forward.
  • Keep your chest lifted and avoid rounding your upper back excessively during the twist.
  • Maintain a slight bend in the standing leg to help with balance.
  • Drive the knee as high as possible to maximize lower abdominal and quadricep engagement.

Pro tips

  • Focus on 'shortening' the distance between your ribcage and the opposite hip bone to maximize oblique contraction.
  • Keep your core braced throughout the entire movement to protect your lower back and maintain balance.

Make it harder

  • Add a small hop as you switch sides to increase the cardiovascular intensity and power output.
  • Hold a light medicine ball or dumbbell at chest height to add resistance to the rotational phase.

Frequently asked

What muscles does the twist knee drive work?
The twist knee drive primarily targets the abs, obliques, and quadriceps, and also works the glutes and hip flexors as secondary muscles.
What equipment do you need for the twist knee drive?
The twist knee drive requires no equipment — just your body weight.
Is the twist knee drive good for beginners?
Yes. The twist knee drive is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • 90 To 90Beginner · abs, glutes, obliques, and quadriceps
  • 90 To 90 SwitchIntermediate · abs, glutes, obliques, and quadriceps
  • Alternate Leg Lift TwistIntermediate · abs, obliques, and quadriceps
  • Barbell Lunge TwistIntermediate · abs, glutes, hamstrings, obliques, and quadriceps

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