Exercise library · Legs

Single-Leg Extension.

Unilateral leg extension that isolates each quad and fixes imbalances.

Also known as: Unilateral Leg Extension, One Leg Extension

BeginnerMachine
The numbers
Sets
3–4
Reps
10–15
Rest
45–75 s
The play-by-play

How to do it.

  1. Step 01

    Sit in the leg extension machine

  2. Step 02

    Place one shin behind the pad

  3. Step 03

    Extend the leg to straighten the knee

  4. Step 04

    Squeeze the quad at the top

  5. Step 05

    Lower under control

  6. Step 06

    Finish reps then switch legs

What separates good from great

Pro cues.

  • Pause and squeeze at the top

  • Control the lowering phase

  • Match reps on both legs

Common questions

Questions, answered.

What is the Single-Leg Extension?
Unilateral leg extension that isolates each quad and fixes imbalances.
What muscles does the Single-Leg Extension work?
The Single-Leg Extension primarily works your quadriceps.
What equipment do I need for the Single-Leg Extension?
You need a machine to perform the Single-Leg Extension.
How many sets and reps should I do for the Single-Leg Extension?
A typical prescription for the Single-Leg Extension is 3–4 sets of 10–15 reps. Rest about 45–75 seconds between sets.
Is the Single-Leg Extension good for beginners?
Yes. The Single-Leg Extension is a beginner-friendly movement, so it is a good choice when you are starting out, as long as you keep the load light and focus on form.

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