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. Alternate Obliques Pulse Twist Side Reach

Exercise guide

Alternate Obliques Pulse Twist Side Reach

  • Beginner
  • Compound
  • Rep-based
  • Waist

This exercise isolates the obliques and transverse abdominis by combining torso rotation with a lateral reach, enhancing core stability and rotational strength. It effectively targets the waistline through a combination of isometric hold and active contraction.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Alternate Obliques Pulse Twist Side Reach demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Obliques

Secondary

  • Erector spinae
  • Glutes
  • Quadriceps

Equipment

  • Body weight

Setup

  1. Sit on the floor with your knees bent and feet flat, hip-width apart.
  2. Lean your torso back to a 45-degree angle until you feel your abdominals engage.
  3. Extend your arms forward or hold them lightly in front of your chest with palms facing each other.

How to do it

  1. Rotate your torso to the right and reach your left hand past your right thigh, exhaling as you twist.
  2. Perform a small, controlled pulse at the end of the reach by moving your hand an extra 2-3 inches further to intensify the oblique contraction.
  3. Inhale as you return to the center position with control.
  4. Repeat the sequence on the left side, reaching your right hand past your left thigh, and continue alternating sides.

Form checklist

  • Keep your chest lifted and avoid rounding your shoulders or lower back.
  • Ensure your hips remain square and both sit-bones stay glued to the floor.
  • Initiate the movement from your ribcage rather than just swinging your arms.
  • Maintain the 45-degree lean throughout the entire set to keep constant tension on the core.

Pro tips

  • Focus on 'wringing out' your midsection like a towel at the peak of the twist to maximize muscle fiber recruitment.
  • Keep your neck neutral by following the movement of your hands with your gaze to ensure the thoracic spine is rotating properly.

Make it harder

  • Lift your feet 2-3 inches off the ground into a boat pose to increase the stability demand on the lower abs.
  • Slow down the pulse phase to a 2-second isometric hold to increase the time under tension for the obliques.

Frequently asked

What muscles does the alternate obliques pulse twist side reach work?
The alternate obliques pulse twist side reach primarily targets the abs and obliques, and also works the erector spinae, glutes, and quadriceps as secondary muscles.
What equipment do you need for the alternate obliques pulse twist side reach?
The alternate obliques pulse twist side reach requires no equipment — just your body weight.
Is the alternate obliques pulse twist side reach good for beginners?
Yes. The alternate obliques pulse twist side reach 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