Quadriceps, Glutes
Hamstrings, Adductors, Calves, Lower Back, Core
Watch Tutorial
https://www.youtube.com/shorts/x9_e41wDJl8
https://www.youtube.com/shorts/Nw2ZJ11N7RI
https://www.youtube.com/shorts/MCkvVWaZn88
Attach chains to bar.
Set up squat in rack.
Bar on back.
Squat down (hips below knees). Chains deload.
Drive up explosively. Resistance increases.
Repeat.