I've added a good 4-5 inches to my standing vert over the past 6 months. But oddly I barely get any higher jumping off 1 foot 
But I'm 5'10", white, and can squeak a couple dunks in if I'm feeling good. Don't need it though, step-back 3's all day
But doing the PHAT routine really helped with that explosiveness. Heavy squats 3x3 and speed/jump squats 3x6 (60% 3R max) a few days later
I also LOVE box jump to rack clean/deadlifts....that's the only think in the gym I do that turns heads

But I'm 5'10", white, and can squeak a couple dunks in if I'm feeling good. Don't need it though, step-back 3's all day

But doing the PHAT routine really helped with that explosiveness. Heavy squats 3x3 and speed/jump squats 3x6 (60% 3R max) a few days later

I also LOVE box jump to rack clean/deadlifts....that's the only think in the gym I do that turns heads
