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How to do it
- Sit on the machine and adjust the back pad so your knees line up with the machine's pivot point.
- Place your shins behind the roller pad with the pad sitting just above the ankle joint, not on the foot.
- Grip the side handles, brace your core, and press your back firmly into the pad.
- Extend your knees smoothly until the legs are straight, squeezing the quads hard at the top.
- Hold the lockout for a beat, keeping the toes pulled up toward the shins for max quad engagement.
- Lower the pad slowly over 2 to 3 seconds back to the start, never letting the stack slam down.
Common mistakes
- Slamming the legs straight with momentum, then dropping the weight fast, which removes most of the loading.
- Setting the seat wrong so the knee pivot doesn't match the machine, which puts shear stress on the joint.
- Lifting the hips off the seat to muscle the weight up, which shifts work away from the quads.
- Cutting the range short on the bottom half, which trains only the easy top portion of the lift.
Muscles worked
- Primary
- Quads
Good to know
- What muscles does the Machine Leg Extension work?
- Mainly the quads.
- What equipment do you need for the Machine Leg Extension?
- It uses a machine. Without it, the Wall Sit trains the same muscles the same way.
- Is the Machine Leg Extension good for beginners?
- GymVim rates it beginner.