the jump manual Poll of the Day

http://wiki.soippo.edu.ua/index.php?title=%D0%9A%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87:Goldetn9l0

He started to study the science of athletic performance and began to experiment on his own. And he found a mix of exercises that increased his vertical jump all the way to a 45 inch vertical - the Jump Manual was