How to do the Leg Extension
Primary: Quads. Also called: machine leg extension, quad extension.
Step by step
- 1
Sit in the machine with your back against the pad and the ankle pad just above your feet.
- 2
Adjust the seat so your knees line up with the machine's pivot point.
- 3
Hold the handles and extend your legs until they are nearly straight.
- 4
Squeeze your quads at the top for a second.
- 5
Lower the weight slowly to the start.
Coaching cues
- Knees aligned with the pivot
- Squeeze at the top
- Slow on the way down
Common mistakes
- Kicking the weight up with momentum
- Letting the weight drop
- Lifting the hips off the seat
Sets, reps and where it fits
Muscle
3–4 × 10–15
rest 60–90 s
Strength
not a strength lift
use for assistance
Fat loss
3 × 10–15
rest 45–60 s
Leg Extension alternatives
Same movement pattern, different equipment or difficulty. Swap one-for-one in any plan.
Frequently asked questions
What muscles does the Leg Extension work?
Primary: Quads.
How many sets and reps of Leg Extension should I do?
For muscle: 3–4 sets of 10–15 reps. For strength on compound lifts: 4–5 sets of 4–6. Rest 60–120 seconds between sets.
What can I do instead of the Leg Extension?
Same movement pattern, different equipment: Wall Sit, Bodyweight Squat, Split Squat, Leg Press, Dumbbell Leg Extensions, Squat with Hip Hinge and Spine Extension.
Is the Leg Extension good for beginners?
Yes. It is a beginner-friendly movement; start light, master the steps above and add load gradually.