Learn more how I increased my vertical by 15 inches - http://www.basketballworkouttips.com/jump-manual-review/
For everyone who still doesn't know 'The Jump Manual' is a training program by a world renowned trainer named Jacob Hiller. This program is specifically for jumping higher. I bought this program a few months ago because I wanted to dunk in basketball. I have a blog where I go into much more detail about this program and how it works so visit it at: http://www.basketballworkouttips.com/
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