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. Smith Frog Hip Thrust

Exercise guide

Smith Frog Hip Thrust

  • Intermediate
  • Compound
  • Rep-based
  • Lower legs
  • Upper legs
  • Waist

The Smith Frog Hip Thrust is a highly targeted glute exercise that uses a 'frog' foot position to maximize gluteus maximus and medius activation while minimizing hamstring contribution. By keeping the soles of the feet together, you force the hips into external rotation, leading to a more intense peak contraction.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Smith Frog Hip Thrust demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Glutes
  • Hamstrings

Secondary

  • Abs
  • Erector spinae

Equipment

  • Smith machine

Setup

  1. Position a flat bench parallel to the Smith machine bar and sit on the floor with your shoulder blades resting against the edge of the bench.
  2. Roll the bar over your hips, using a thick pad for comfort, and unlock it from the rack.
  3. Place the soles of your feet together and pull your heels toward your glutes, allowing your knees to flare out to the sides.
  4. Grip the bar firmly with both hands to stabilize it throughout the set.

How to do it

  1. Drive through the outer edges of your feet to lift the bar by extending your hips toward the ceiling.
  2. Exhale as you reach full hip extension, performing a posterior pelvic tilt (tucking your tailbone) to maximize glute engagement.
  3. Inhale as you lower the bar under control, stopping just before your glutes touch the floor.
  4. Maintain a steady 2-1-2 tempo: 2 seconds down, 1 second squeeze at the top, and 2 seconds up.

Form checklist

  • Keep your chin tucked toward your chest and your gaze forward at all times to protect the spine.
  • Ensure your knees remain flared out and do not collapse inward as you fatigue.
  • Maintain a rigid torso to prevent lower back arching at the top of the movement.
  • Keep the soles of your feet pressed firmly against each other throughout the entire range of motion.

Pro tips

  • Focus on 'scooping' your pelvis upward at the top of the rep to achieve a maximum glute contraction.
  • Push your knees toward the floor as you ascend to further engage the gluteus medius and minimus.

Make it harder

  • Place a resistance band just above your knees to increase the tension on the hip abductors.
  • Incorporate a 3-second isometric hold at the top of every repetition to increase time under tension.

Frequently asked

What muscles does the smith frog hip thrust work?
The smith frog hip thrust primarily targets the glutes and hamstrings, and also works the abs and erector spinae as secondary muscles.
What equipment do you need for the smith frog hip thrust?
The smith frog hip thrust uses smith machine.
Is the smith frog hip thrust good for beginners?
The smith frog hip thrust is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • Alternating Hamstring Curl JackIntermediate · abs, glutes, hamstrings, and quadriceps
  • Alternating Hamstring Curl Overhead ClapIntermediate · abs, glutes, and hamstrings
  • Around The World Superman HoldIntermediate · erector spinae, glutes, hamstrings, lats, and trapezius
  • Back Leg Lift JackBeginner · abs, glutes, hamstrings, and obliques

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