Error! You must javascript enabled to use this form. Please enable Javascript in your browser. Manual Gives Users a Vertical Jump Formula Used by Professional Athletes Professional volleyball player John Moran says The Jump Manual gave him a vertical jump workout plan that had him leaping higher than ever before. View full press release Your Name: Your Email: Subject: Question: We respects your privacy, the information you entered above will not be used to send unsolicited email, and will not be rented or sold to a 3rd party. Your contact information will be shared with the recipient of this message - Privacy Policy Send