Single Leg Extensions

Single Leg Extensions isolate each quad individually, helping correct strength imbalances while maintaining constant tension through knee extension. By training one leg at a time, you improve muscle control and symmetry—making this a precise, effective movement for building quad strength and definition without loading the hips or lower back. Think of it as targeted quad work with maximum focus.

Category
Strength
Difficulty
Intermediate
Movement
Isolation
Bodyweight
No
Quads muscle illustration
Sculpt
How to

How to do the Single Leg Extensions

  1. 01

    Adjust the machine so the pad rests just above your ankle and your knee lines up with the machine’s pivot point.

  2. 02

    Sit tall with your back pressed into the seat and hands gripping the handles.

  3. 03

    Start with one knee bent and the other foot resting on the floor.

  4. 04

    Extend your working leg by straightening the knee, squeezing the quad at the top.

  5. 05

    Pause briefly at full extension without locking out the knee.

  6. 06

    Lower the weight back down slowly to the starting position.

  7. 07

    Switch legs and repeat.

Performance tips

Cues that matter

  • **One leg, full focus:** Don’t rush—control every rep.
  • **Smooth tempo:** Avoid swinging the weight.
  • **Even sides:** Match reps and tempo to keep both quads balanced.
Muscles

Muscles worked

Equipment

What you need

Common questions

Frequently asked

What muscles does the Single Leg Extensions work?

The Single Leg Extensions primarily targets the Quads.

Is the Single Leg Extensions a compound or isolation exercise?

The Single Leg Extensions is an isolation exercise, meaning it focuses on a single muscle group through one joint movement.

What equipment do I need for the Single Leg Extensions?

You need the following equipment: Leg Extension.

What difficulty level is the Single Leg Extensions?

The Single Leg Extensions is rated as intermediate difficulty. Some training experience is helpful for performing this exercise safely.

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