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. Back
  6. /
  7. Windmill On Chair

Exercise guide

Windmill On Chair

  • Intermediate
  • Compound
  • Rep-based
  • Back
  • Lower arms
  • Lower legs
  • Shoulders
  • Upper arms
  • Upper legs
  • Waist

This beginner-friendly variation of the windmill uses a chair to provide stability and a depth target, effectively targeting the obliques and core through controlled lateral hinging and rotation. It improves spinal mobility and functional core strength by teaching the body to rotate while under tension.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Windmill On Chair demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Obliques

Secondary

  • Erector spinae
  • Glutes
  • Hamstrings
  • Quadriceps

Equipment

  • Body weight

Setup

  1. Stand with your feet wider than shoulder-width apart, with a chair positioned next to your left side.
  2. Turn your left foot out 45 degrees toward the chair and keep your right foot pointing forward.
  3. Extend your right arm straight up toward the ceiling, locking your gaze on your right thumb.

How to do it

  1. Inhale and shift your hips toward the right, keeping your right leg straight and your weight primarily on the right heel.
  2. Exhale as you slowly lower your left hand to touch the seat of the chair, rotating your torso to keep your chest open.
  3. Pause for a second at the bottom, ensuring your arms form a straight vertical line from the chair to the ceiling.
  4. Inhale as you engage your right-side obliques to pull your torso back to the starting upright position.

Form checklist

  • Keep your eyes on your elevated hand throughout the entire movement to maintain spinal alignment.
  • Ensure the leg on the side of the raised arm remains straight to facilitate the hip hinge.
  • Focus on pushing your hips out to the side rather than just bending at the waist.
  • Keep your chest 'open' and facing the wall in front of you, not the floor.

Pro tips

  • Imagine your body is sandwiched between two panes of glass to ensure you are moving laterally rather than leaning forward.
  • Focus on the 'mind-muscle connection' by feeling the stretch in your hamstrings and the contraction in your obliques as you rise.

Make it harder

  • Increase the range of motion by reaching for the chair's crossbar or the floor instead of the seat.
  • Hold a light weight, such as a water bottle or small dumbbell, in the overhead hand to increase the stability challenge.

Frequently asked

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

Related exercises

  • Body Saw PlankIntermediate · abs, lats, and obliques
  • Elevated Lunge T Spine RotationIntermediate · abs, glutes, hamstrings, obliques, and quadriceps
  • FlagIntermediate · abs, lats, obliques, and trapezius
  • InchwormIntermediate · abs, hamstrings, obliques, pectorals, and trapezius

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