
The hack squat is performed on a guided machine with your back pressed against an inclined pad.
Place your back and shoulders against the pads, feet shoulder-width apart in the middle of the platform, then release the safety catch.
Lower your body by bending your knees until your thighs are at least parallel to the platform, then push back up through your feet.
Do not lock your knees at the top and re-engage the safety before stepping out.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry