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  3. Exercises
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  5. Legs
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  7. Alternate Single Leg Sit Wall

Exercise guide

Alternate Single Leg Sit Wall

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

This exercise builds lower body endurance and unilateral stability by combining an isometric wall sit with alternating leg extensions. It targets the quadriceps and glutes while challenging core stability and balance through a dynamic movement pattern.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Alternate Single Leg Sit Wall demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Calves
  • Glutes
  • Hamstrings
  • Quadriceps

Secondary

  • Abs
  • Obliques

Equipment

  • Body weight

Setup

  1. Stand with your back against a flat wall and your feet shoulder-width apart, approximately two feet away from the wall.
  2. Slide your back down the wall until your thighs are parallel to the floor, forming a 90-degree angle at both your hips and knees.
  3. Press your entire spine, including your lower back and shoulders, firmly against the wall.
  4. Position your arms at your sides or cross them over your chest, ensuring your hands do not rest on your thighs.

How to do it

  1. Inhale to brace your core, then exhale as you slowly extend one leg straight out in front of you until it is parallel to the floor.
  2. Hold the extended position for one second, maintaining a perfectly still torso and a 90-degree bend in the supporting leg.
  3. Inhale as you lower the foot back to the floor with control, returning to the standard wall sit position.
  4. Immediately repeat the movement with the opposite leg, alternating sides at a slow, controlled tempo.

Form checklist

  • Keep your lower back pressed flat against the wall to prevent arching.
  • Ensure the knee of the supporting leg stays aligned with your toes and does not cave inward.
  • Maintain the 90-degree depth; do not allow your hips to rise as you switch legs.
  • Keep your head and shoulder blades in contact with the wall throughout the set.

Pro tips

  • Drive the heel of the planted foot into the ground to maximize glute and quad recruitment on the stationary side.
  • Focus on keeping your hips level; do not let one side of your pelvis drop when you lift the opposite leg.
  • Squeeze the quadriceps of the extended leg as hard as possible at the top of the movement for a peak contraction.

Make it harder

  • Hold a weight plate or dumbbell against your chest to increase the resistance on the lower body.
  • Increase the time under tension by holding the leg extension for 3-5 seconds before switching sides.

Frequently asked

What muscles does the alternate single leg sit wall work?
The alternate single leg sit wall primarily targets the calves, glutes, hamstrings, and quadriceps, and also works the abs and obliques as secondary muscles.
What equipment do you need for the alternate single leg sit wall?
The alternate single leg sit wall requires no equipment — just your body weight.
Is the alternate single leg sit wall good for beginners?
The alternate single leg sit wall is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

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
  • Alternate Knee Cross Over Sit Against WallIntermediate · 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.

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