LEGS · ISOLATION
Single-Leg Leg Extension
A unilateral machine leg extension for balanced quadriceps work.
Primary musclesQuads
Secondary muscles—
EquipmentLeg extension machine
DifficultyBeginner · Knee Extension
How to perform
- Adjust the machine and secure one leg.
- Extend the knee smoothly.
- Lower slowly and switch sides.
Tips
- Control the movement and use a range you can repeat consistently.
- Choose a load or variation that lets you keep the quads as the intended focus.
Common mistakes
- Using more load or speed than you can control.
- Losing stable body position during the difficult portion.
Watch how to perform it
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