Very reactive? Depends on how you put it. "Very reactive" off one leg, completely UN-reactive off two. If you would've put me to jump off a running two-leg vert back then I would've crumbled to the ground as soon as I would've planted off two feet. I just don't get it, could I have SUCH weak quads or maybe I distribute the tension differently depending on the plant?
For me, the two leg jump was always a matter of "go to the spot and do a SVJ" mentality.
Oh, and I NEVER jumped 35 off two, lol. Not even close. MAYBE 32 at the most.
If you count a 12 inch vert as a starting point, for someone who hasn't done any sports in his life ever, yes. Otherwise, my baseline probably is 20-22 inch (SVJ, not that any momentum helps too much anyway), highest I got was ~28 inches or so.
Oh, and if I don't squat regularly ~100 kg feels like max, low bar. High bar probably ~80-90. So it's all a bunch of bullshit.
I actually did get to dunk just by practicing dunking (off one).
The strength training and stuff just stabilized my dunking (it was less dependent on the day, I could dunk consistently). That's pretty much it. In terms of height attained, didn't help almost at all. 7 years of non-stop training for nothing.
Strength training usually required me to gain weight, and whatever I gained strength-wise was negated by the added weight and by the fact that I started to use less and less speed in my jump, and more strength. This translated itself in the same height being attained in the jump.