Pendulum Squat.

Go deep. Keep your back.

A straight, linear path forces you to choose between depth and a lower back that stays put. The pendulum path carries the load in an arc instead, so the angle between back and knee stays more even all the way down, you get deeper before the pelvis starts to tuck under. The shoulder and back pad spreads the pressure over a larger area, so you can go heavy without anything pressing on a single point. The footprint is 2400 × 1670 mm, and you should allow room in front of the machine for loading and unloading plates. 239 kg of dead weight that does not move when you do.