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  3. Exercises
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  5. Legs
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  7. Lever Single Leg Extension Plate Loaded

Exercise guide

Lever Single Leg Extension Plate Loaded

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

This unilateral isolation exercise targets the quadriceps, allowing for focused muscle activation and the correction of strength imbalances between legs. The plate-loaded leverage design provides a consistent resistance profile to maximize tension at the peak of the contraction.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Lever Single Leg Extension Plate Loaded demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Quadriceps

Secondary

  • Abs

Equipment

  • Leverage machine

Setup

  1. Adjust the backrest so your knee joint aligns perfectly with the machine's pivot point.
  2. Position the lower leg pad just above your ankle, ensuring it rests comfortably on the lower shin.
  3. Sit back firmly against the pad and grasp the side handles to stabilize your torso and keep your hips down.
  4. Place one leg behind the pad and keep the non-working leg relaxed or on the footrest.

How to do it

  1. Exhale as you extend your leg upward in a controlled arc until your knee is fully straight but not forcefully locked.
  2. Squeeze your quadriceps hard at the top of the movement for a one-second pause.
  3. Inhale as you slowly lower the weight back to the starting position over a 3-second tempo.
  4. Stop just before the weight plates touch to maintain constant tension on the muscle.

Form checklist

  • Keep your lower back and hips pressed firmly against the seat at all times.
  • Ensure the movement is driven by the quadriceps, not by swinging the leg or using momentum.
  • Keep your toes pointed toward the ceiling or slightly outward to maintain quad engagement.
  • Maintain a neutral neck and grip the handles firmly to prevent your body from lifting off the seat.

Pro tips

  • To emphasize the Vastus Medialis (teardrop muscle), focus on the final 10 degrees of extension and hold the peak contraction.
  • Lean slightly forward or stay perfectly upright to alter the stretch on the rectus femoris muscle.

Make it harder

  • Perform a 5-second slow eccentric (lowering) phase to increase metabolic stress.
  • Add a 2-second isometric hold at the top of every repetition.

Frequently asked

What muscles does the lever single leg extension plate loaded work?
The lever single leg extension plate loaded primarily targets the quadriceps, and also works the abs as secondary muscles.
What equipment do you need for the lever single leg extension plate loaded?
The lever single leg extension plate loaded uses leverage machine.
Is the lever single leg extension plate loaded good for beginners?
Yes. The lever single leg extension plate loaded 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
  • 90 To 90Beginner · abs, glutes, obliques, 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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