Drop, rebound, explode onto the next box.
Minimise ground time, rebound off the floor the moment you touch it.
The 2-box depth jump trains reactive power, the ability of your quads and glutes to absorb a landing and fire straight back out of it. Stepping off the first box loads your legs on impact, and the instant rebound onto the second box teaches your muscles and tendons to return that energy fast instead of soaking it up. This is athletic training rather than muscle building, the tool for jumping higher and moving off the floor quicker.
Start low, around knee height for the drop box. The drop height only earns an increase when you can rebound instantly with soft, quiet landings, dropping from too high just teaches slow, heavy landings.
Low reps, full quality. Something like 3 to 5 sets of 3 to 5 jumps with real rest between sets. The moment ground contact gets slow or landings get loud, you're done.
The impact is the training effect, so respect the dose. Keep boxes low, land soft on both feet, keep total jumps modest, and if your knees complain, ease off the height and check your landing mechanics.
