Learn exactly how The Jump Manual uses pure science to increase your vertical leap!
Posted on January 7, 2010
JumpManual.WorldProReviews.com The Jump Manual's author, Jacob Hiller, is a vertical jumping trainer who has trained hundreds of athletes to a 40+ inch vertical. He has trained athletes as high as Olympic athletes and boasts a 44-inch vertical of his own. For more visit JumpManual.WorldProReviews.com ... lose stout gain muscle vertical jumping program0.73 increase jumping0.8 chest to mass quick
