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  1. Home
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  3. Exercises
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  5. Core & Abs
  6. /
  7. Lever Trunk Rotation

Exercise guide

Lever Trunk Rotation

  • Beginner
  • Compound
  • Rep-based
  • Waist

The Lever Trunk Rotation isolates the internal and external obliques by providing constant resistance through a rotational plane, essential for core stability and waistline definition.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Lever Trunk Rotation demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Obliques

Secondary

  • Erector spinae

Equipment

  • Leverage machine

Setup

  1. Adjust the seat height so your chest is comfortably aligned with the chest pad or handles.
  2. Sit firmly with your back straight and secure your knees/thighs against the pads to lock your lower body in place.
  3. Grasp the handles lightly, ensuring your arms are used only as anchors rather than the primary movers.
  4. Set the machine's starting pin to your desired range of motion for one side.

How to do it

  1. Exhale as you rotate your torso to the side, initiating the movement solely from your obliques and core.
  2. Rotate as far as your natural range of motion allows while keeping your hips completely stationary.
  3. Inhale as you slowly return to the starting position using a controlled 2-3 second eccentric tempo.
  4. Complete the full set on one side before switching the machine setting to the opposite side.

Form checklist

  • Keep your hips and pelvis glued to the seat; do not let them twist.
  • Maintain an upright posture with your chest up and shoulders down.
  • Avoid pulling with your arms or hands; they should remain passive.
  • Ensure the rotation occurs at the waist, not the neck or upper back.

Pro tips

  • Focus on the mind-muscle connection by visualizing your ribcage rotating around your spine.
  • Pause for one second at the peak of the rotation to maximize the contraction of the oblique fibers.

Make it harder

  • Implement a 3-second isometric hold at the point of maximum rotation.
  • Slow down the return phase to 4 seconds to increase time under tension.

Frequently asked

What muscles does the lever trunk rotation work?
The lever trunk rotation primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
What equipment do you need for the lever trunk rotation?
The lever trunk rotation uses leverage machine.
Is the lever trunk rotation good for beginners?
Yes. The lever trunk rotation 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.

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