well there’s no set number, everyone is different, but I personally put 12" on my running vertical (27 to 39) in 2 years (not 12 weeks looool). Didn’t really care about speed but now I do. I don’t really have any measurements on speed currently, but I know I am MUCH faster than what I was naturally… naturally I am a 12.5x±13.x 100m and 5.5x+ 40 yard dash, with a sub 8’ broad jump, and 25-27 inch running vert. Pretty crappy stats.
There’s really no point in asking what you can “realistically achieve”, because honestly, there’s many methods in place to help you PR for many years to come.
My peak vert was last august (2009), then I detrained for 6 months or so and went back down to 25" RVJ… I’ve been training my ass off even harder than I had in those two years when going up to 39, so i’m back to 36-37 right now on my peak running vert… I plan on getting 45" this time, nothing will stop me. I also plan on getting a 4.5x 40 yard dash or faster, since I’ve become obsessed with speed this time around. I’m probably at 4.9x right now.
Anyway, that’s my own experience with performance training. If you push your limits, intelligently, there really is no stopping what you can achieve.
My biggest mistake in those two years, as opposed to now, was taking rest days… I perform some movement maximally, every day, usually sprinting. For example, say I am sore as hell in my hamstrings/glutes, that would make top speed sprinting out of the question, but it definitely doesn’t make 10 yard sprints (with a long decel) out of the question… it definitely doesn’t make pogos/MR tuck jumps out of the question… definitely doesn’t make upper body out of the question, or heavy sled sprints… etc Biggest thing I learned after detraining and then training entirely differently, is to stay on a high frequency approach all the time, and performing some kind of maximal effort explosive training every day. I put alot more emphasis now on overall conditioning too, I even run mile “sprints” for time sometimes the day before doing dunk sessions, it doesn’t have any negative effect on my jumping, in fact I feel bouncier as a result.
anyway just some quick thoughts off the top of my head.
don’t sell yourself short, go get it.
peace
edit: here’s a vid from yesterday, pretty happy about it… but I got alot of work to do before going over 40 and eventually 45" RVJ.
hopefully no major injuries will occur, and within 3 months or so I will be back up to 39 and possibly 40… if i don’t get injured, i see that as a definite.