Up onto the box, then sink back into deep range.

Control the way down into the deficit, don't just drop, that bottom range is the whole point.
The Step Up to Deficit Reverse Lunge is a Quads-first movement, with Glutes working as the supporting cast. Track it consistently and you'll see exactly how it feeds your quads volume for the week.
The Step Up to Deficit Reverse Lunge primarily works the Quads with Glutes assisting.
Shorten the range or use an easier variation, and stop 1 to 2 reps before failure. Reps build fast when you train just shy of your limit.
Yes, it's a unilateral movement. Start with your weaker side and match the reps with your stronger side so no side gets ahead.




