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. Arms
  6. /
  7. Cable Forearm Pronation

Exercise guide

Cable Forearm Pronation

  • Beginner
  • Isolation
  • Rep-based
  • Lower arms
  • Upper arms

This isolation exercise targets the pronator teres and pronator quadratus, essential for grip strength and stabilizing the elbow during heavy lifts. It builds rotational power and forearm thickness by focusing on the inward rotation of the radius over the ulna.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Cable Forearm Pronation demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Forearms

Secondary

  • Biceps

Equipment

  • Cable

Setup

  1. Set the cable pulley to elbow height and attach a single D-handle or a short rope.
  2. Stand sideways to the cable machine and grasp the handle with your near-side hand in a neutral grip (thumb pointing up).
  3. Bend your elbow to 90 degrees and tuck it firmly against your side, keeping your forearm parallel to the floor.
  4. Step away from the machine until there is slight tension on the cable while your thumb is still pointing up.

How to do it

  1. Exhale as you rotate your forearm inward, turning your palm toward the floor until your thumb points toward your body.
  2. Hold the peak contraction for one second, focusing on the squeeze in the top of your forearm near the elbow.
  3. Inhale as you slowly rotate your hand back to the starting neutral position over a controlled 2-second tempo.
  4. Complete the full set on one arm before switching sides to ensure equal volume.

Form checklist

  • Keep the elbow pinned to your ribs to prevent the shoulder from assisting the movement.
  • Maintain a strict 90-degree angle at the elbow throughout the entire set.
  • Ensure the movement comes solely from forearm rotation rather than wrist flexion or extension.
  • Keep your torso upright and stationary; avoid leaning or twisting your body to move the weight.

Pro tips

  • Focus on the 'thumb-down' movement; imagine you are pouring water out of a pitcher to maximize pronator activation.
  • Use a 'fat grip' attachment or wrap a towel around the handle to increase the diameter and intensify muscle fiber recruitment.

Make it harder

  • Implement a 4-second eccentric phase to increase time under tension and stimulate more hypertrophy.
  • Hold the handle at the very end (offset grip) to increase the lever arm, making the rotation significantly more difficult.

Frequently asked

What muscles does the cable forearm pronation work?
The cable forearm pronation primarily targets the forearms, and also works the biceps as secondary muscles.
What equipment do you need for the cable forearm pronation?
The cable forearm pronation uses cable.
Is the cable forearm pronation good for beginners?
Yes. The cable forearm pronation is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • Band Wrist CurlBeginner · forearms
  • Barbell Behind Back Finger CurlBeginner · forearms
  • Barbell Palms Down Wrist Curl Over A BenchIntermediate · forearms
  • Barbell Palms Up Wrist Curl Over A BenchBeginner · forearms

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