About this machine
This is a more demanding movement. It becomes useful after you can control the basic path and setup; it is not a required beginner exercise. Learn it with a trainer or at the lightest load before using it in a programme.
Muscles worked
- Main load: Front thigh.
- Stabilization: trunk muscles help hold position.
- Should not hurt: joints or lower back. If they do, reduce load and check setup.
How to set up
- For the Hack Squat, first check its source-listed detail: uses a foot support or platform to fix the position.
- Adjust the seat, platform, or shoulder supports for your height.
- Place the feet symmetrically and check knee direction.
- Choose a start depth where the pelvis stays supported.
- Release stops only after the start position is stable.
How to perform
Main exercise: hack squat.
- On the Hack Squat, move smoothly through this model's working path.
- Keep the knees tracking with the feet.
- Do not bounce out of the bottom position.
- Return under control without snapping the joints locked.
Common mistakes
- Letting the knees collapse inward or drift without control.
- Lifting the heels from the platform.
- Going so deep that the pelvis rounds away from support.
- Locking the knees harshly at the end.
- Ignoring this model-specific detail: uses a foot support or platform to fix the position.
Technique video
Sources: gym80.de product page for 4159N; gym80.de image saved locally; video embedded from the original YouTube source. PDF data: page 55, printed page 53.