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. Side Lying Single Leg Kick

Exercise guide

Side Lying Single Leg Kick

  • Beginner
  • Isolation
  • Rep-based
  • Lower legs
  • Waist

This Pilates-inspired isolation exercise improves hip mobility and lateral stability while strengthening the obliques, glutes, and quadriceps. It challenges the core to maintain a perfectly still torso while the leg moves through a dynamic range of motion.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Side Lying Single Leg Kick demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Glutes
  • Hip flexors

Secondary

  • Hamstrings

Equipment

  • Body weight

Setup

  1. Lie on your side with your legs extended straight, angled slightly in front of your hips to create a shallow 'banana' shape for stability.
  2. Prop your head up with your bottom hand or rest your head on your extended bottom arm.
  3. Place your top hand on the floor in front of your chest for balance and stack your hips vertically.
  4. Engage your core to create a small space between your waist and the floor, ensuring your spine is neutrally aligned.

How to do it

  1. Lift your top leg to hip height, keeping it parallel to the floor and your foot flexed.
  2. Inhale and kick the top leg forward as far as possible without rounding your back, using a controlled double-pulse motion.
  3. Exhale and sweep the leg back behind your hip line, pointing your toes and squeezing your glutes while keeping your torso perfectly still.
  4. Perform all reps on one side before switching, maintaining a steady, rhythmic tempo.

Form checklist

  • Keep the hips stacked vertically; do not let the top hip roll forward or backward during the kick.
  • Maintain a 'quiet' upper body—the torso should not rock or sway as the leg moves.
  • Keep the moving leg at hip height throughout the entire forward and backward sweep.
  • Engage the obliques to prevent the lower back from arching when the leg moves behind the body.

Pro tips

  • Focus on 'reaching' the leg away from the hip socket to create length and maximize muscle engagement.
  • Press the bottom leg firmly into the floor to act as an anchor, which increases stability and core recruitment.
  • Visualize your torso being set in concrete; only the hip joint should be mobile.

Make it harder

  • Place your top hand behind your head instead of on the floor to significantly increase the balance challenge.
  • Add a small resistance band around your ankles to increase the load on the glutes and hip abductors.

Frequently asked

What muscles does the side lying single leg kick work?
The side lying single leg kick primarily targets the glutes and hip flexors, and also works the hamstrings as secondary muscles.
What equipment do you need for the side lying single leg kick?
The side lying single leg kick requires no equipment — just your body weight.
Is the side lying single leg kick good for beginners?
Yes. The side lying single leg kick is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • Barbell Hang CleanAdvanced · erector spinae, glutes, hamstrings, hip flexors, and quadriceps
  • Bodyweight SwingIntermediate · glutes, hamstrings, and hip flexors
  • Deep Squat Reach Forward Reach UpBeginner · glutes, hip flexors, and quadriceps
  • Double Knee Side ThrustIntermediate · glutes, hip flexors, 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