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. 45 Degree Hyperextension Arms In Front Of Chest

Exercise guide

45 Degree Hyperextension Arms In Front Of Chest

  • Beginner
  • Compound
  • Rep-based
  • Lower back

The 45-degree hyperextension is a premier posterior chain exercise that emphasizes hip extension to build the glutes and hamstrings while strengthening the erector spinae. Crossing the arms over the chest shortens the lever arm, making it an excellent variation for mastering the hinge pattern with controlled tension.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the 45 Degree Hyperextension Arms In Front Of Chest demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Glutes
  • Hamstrings

Secondary

  • Erector spinae

Equipment

  • Dumbbell

Setup

  1. Adjust the hip pad height so the top edge sits just below your hip crease, allowing your pelvis to rotate freely.
  2. Step onto the footplate and secure your ankles firmly under the padded rollers.
  3. Stand with your legs straight (knees slightly soft) and cross your arms over your chest, placing your hands on opposite shoulders.
  4. Align your head, neck, and spine into a neutral, straight line.

How to do it

  1. Inhale and slowly hinge forward at the hips, lowering your torso toward the floor while keeping your back flat.
  2. Lower yourself until you feel a significant stretch in your hamstrings, ensuring the movement comes from the hips and not the waist.
  3. Exhale and drive your hips hard into the pad to pull your torso back up to the starting position.
  4. Stop when your body forms a straight line from your head to your heels; do not arch your back past neutral.

Form checklist

  • Keep your chin tucked slightly to maintain a neutral neck position.
  • Ensure the hinge occurs at the hip joint, not by rounding the lumbar spine.
  • Maintain a slight bend in the knees to avoid joint strain and keep tension on the muscles.
  • Squeeze your glutes forcefully at the top of the movement.

Pro tips

  • To shift more emphasis to the glutes, turn your toes out at a 45-degree angle and focus on 'pushing' the pad away with your hips.
  • Maintain a 'proud chest' throughout the descent to prevent the upper back from rounding.
  • Focus on a slow 3-second eccentric (lowering) phase to maximize hamstring hypertrophy.

Make it harder

  • Add a 2-second pause at the top of the movement while maximally contracting the glutes.
  • Move your hands from your chest to behind your head (prisoner style) to increase the resistance through a longer lever arm.

Frequently asked

What muscles does the 45 degree hyperextension arms in front of chest work?
The 45 degree hyperextension arms in front of chest primarily targets the glutes and hamstrings, and also works the erector spinae as secondary muscles.
What equipment do you need for the 45 degree hyperextension arms in front of chest?
The 45 degree hyperextension arms in front of chest uses dumbbell.
Is the 45 degree hyperextension arms in front of chest good for beginners?
Yes. The 45 degree hyperextension arms in front of chest is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • Barbell HyperextensionIntermediate · glutes and hamstrings
  • Smith Bent Knee Good MorningIntermediate · erector spinae, glutes, and hamstrings
  • 3 Point Standing HopsIntermediate · calves, glutes, hamstrings, and quadriceps
  • 4 Cone Single Foot Lateral HopsIntermediate · calves, glutes, hamstrings, 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