Legs · Machine

Leg extension — Machine

Muscles requiredRectus femoris · Vastus medialis · Vastus lateralis

Description

Isolated knee extension to target the quadriceps.

01 · Setup

Set up the movement

  • Adjust machine supports to stay aligned from start to finish.
  • Back stable, pelvis supported, knees aligned with the axis of movement.
  • Neutral ankles, core covered.
  • Choose an range of motion without pain.
  • Adjust the supports to stay aligned from start to finish.
02 · Execution

Perform the rep

  1. Straighten your knees under control until the quadriceps contract.
  2. Pause briefly at the top.
  3. Slowly lower back down to the stretch.
Technique cue

Controlled extension, without snapping the knees.

Common mistakes
  • hard lock at the top
  • descent too fast
  • moving pelvis
  • forced range of motion
  • force an range of motion beyond your mobility
Safety notes

Risks of poor execution

  • The guided trajectory reduces lateral instability.
  • A forced range of motion can still overload the joints.

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