RE: how to increase vertical jump?
vertical jump is best improved by polymetrics. take a look into a program like "Air Alert 2" or something like that. I used this type of program for 8 weeks and increased vertical by 7 inches in high school, since then i did some research on polymetrics in general and raised my vertical from 30 to 43 inches in around 2 years. i stopped doing the polymetrics for the past year though. search for it on the internet, there are plenty of sites around.