Vertical jump training from one of the top vertical jump experts.Articles, videos, exercises, and information on how to jump higher and be a more explosive athlete.Jacob Hiller has taught thousands of people to jump higher with his popular system "The Jump Manual."Now you can have access to many of his articles and videos right from your Android.Features include:- Video training section- Ask a question section- Dunk videos sectionPlease note that this is not "The Jump Manual" but a free jump training resource. "The Jump Manual" can be purchased separately.