Knee Extension · Leg extension machine
Leg Extension
Primary muscles: Quadriceps
Exercise data by RepDB (repdb.co)
Setup
- Adjust the back pad and seat so the knee aligns with the machine pivot as closely as practical.
- Set the lower-leg pad above the ankle.
- Sit fully against the backrest.
How To Perform It
- Extend the knees smoothly.
- Squeeze the quadriceps near the top without snapping into lockout.
- Lower under control to the start.
Key ASF Cue
“Lift and lower under control - do not kick the stack.”
Common Mistakes
- Poor seat/pivot alignment.
- Swinging the torso.
- Snapping the knees into hard lockout.
Alternatives / Substitutions
Safety Note
Use a comfortable range and avoid forcing through knee pain.