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Last updated March 5, 2026
AdductorsCalvesHamstringsQuadriceps
Leg Extension (Machine)
Adjust the pad to rest on your lower shins. Kick your legs up until straight, squeezing your thigh muscles (quads). Lower firmly but with control; don't just drop the weight.
Quick facts
- Level
- Beginner
- Mechanic
- Isolation
- Force
- Push
- Type
- Strength
- Injury Risk
- Low
- Hypertrophy
- High
- Calorie Burn
- Low-Medium
Muscle focus
Primary and secondary muscle groups targeted by this movement.
Primary
Quads
Secondary
Front Quad
Equipment & setup
What you need and how to position yourself before starting.
Equipment
Weight Machines / Selectorized
Movement pattern
Bilateral
Posture
Seated
Tracking parameters
repsweight
Step-by-step instructions
Follow these cues to master proper technique and stay safe through every rep.
- Step 1Setup
- Adjust the seat of the leg extension machine so that your knees align with the pivot point of the machine.
- Sit down and ensure your back is against the backrest, with your feet positioned under the padded bar.
- Step 2Adjust the Machine
- Set the weight on the machine according to your fitness level.
- Make sure the padded bar is resting comfortably on your lower legs, just above your ankles.
- Step 3Position Your Feet
- Place your feet shoulder-width apart and flex your feet slightly to engage your quadriceps.
- Ensure your knees are in line with the machine's pivot point.
- Step 4Extend Your Legs
- Slowly extend your legs upward by straightening your knees, keeping your feet flexed.
- Focus on contracting your quadriceps as you lift the weight.
- Step 5Hold the Position
- Pause briefly at the top of the movement when your legs are fully extended.
- Avoid locking your knees to prevent injury.
- Step 6Lower Your Legs
- Gradually lower the weight back to the starting position by bending your knees.
- Maintain control of the movement and avoid letting the weight drop quickly.
- Step 7Repeat
- Continue to repeat the extension and lowering for the desired number of repetitions.
- Focus on maintaining proper form throughout each rep.
- Step 8Finish the Exercise
- After completing your reps, carefully lower the weight and remove your feet from the padded bar.
- Stand up slowly and ensure you feel stable before leaving the machine.
Alternatives & variations
Explore similar movements targeting the same muscles.
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