Skip to content
Crucible
Download on the App Store
Crucible

Crucible is a precision strength training system built around your body, your equipment, your location, and your time.

Download on the App Store

© 2026 Crucible Fit, LLC. All rights reserved.

Explore

  • Exercise Library

Legal

  • Terms and Conditions
  • Privacy Policy
  • Consumer Health Data Notice

Support

  • Support
  1. Home
  2. /
  3. Exercises
  4. /
  5. Legs
  6. /
  7. Lying Alternate Flutter Kick

Exercise guide

Lying Alternate Flutter Kick

  • Beginner
  • Isolation
  • Rep-based
  • Lower legs

The Lying Alternate Flutter Kick is a prone isolation exercise that targets the glutes and hamstrings through controlled hip extension, improving posterior chain stability and endurance.

Reviewed by the Crucible team · Updated June 2026

Watch the Lying Alternate Flutter Kick demonstrationGuided video and your full workout live in the Crucible app.

Muscles worked

Primary

  • Glutes
  • Hamstrings

Secondary

  • Abs
  • Obliques

Equipment

  • Body weight

Setup

  1. Lie face down on a flat surface with your legs fully extended and toes pointed.
  2. Stack your hands under your forehead or place your arms by your sides for stability.
  3. Engage your core by pulling your belly button slightly away from the floor to protect your lower back.
  4. Press your pubic bone into the floor to stabilize your pelvis.

How to do it

  1. Squeeze your right glute to lift your right leg 3-6 inches off the floor while keeping the knee completely straight.
  2. Lower the right leg back toward the floor while simultaneously lifting the left leg in a rhythmic 'fluttering' motion.
  3. Exhale sharply with each lift and inhale steadily throughout the movement.
  4. Maintain a controlled, moderate tempo, ensuring the movement comes from the hips rather than the knees.

Form checklist

  • Keep your hips glued to the floor; do not let your lower back arch excessively.
  • Ensure your legs remain locked straight to maximize hamstring and glute tension.
  • Keep your neck neutral by looking down at the floor throughout the set.
  • Avoid swinging the legs; use muscular control to lift and lower.

Pro tips

  • Think about reaching your toes toward the wall behind you to create length and maximize hip extension.
  • Focus on the 'mind-muscle connection' by visualizing your glutes doing the work rather than your lower back muscles.

Make it harder

  • Perform the movement with both thighs hovering slightly off the floor the entire time.
  • Wear ankle weights to increase the resistance on the hamstrings and glutes.

Frequently asked

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

Related exercises

  • 3 Point Standing HopsIntermediate · calves, glutes, hamstrings, and quadriceps
  • 4 Cone Single Foot Lateral HopsIntermediate · calves, glutes, hamstrings, and quadriceps
  • 4 Way Single Leg HopAdvanced · calves, glutes, hamstrings, and quadriceps
  • 45 Degrees Single Leg Reverse HyperextensionIntermediate · erector spinae, glutes, and hamstrings

Train this with a plan, not guesswork

Crucible builds the lying alternate flutter kick into a precise program around your body, equipment, location, and time.

Download on the App Store