Sky On: Jump Theory 101: Learn the Secrets To Better Jumping

The High Flying "J. Sky On" Shares His Amazing Jumping Techniques In "Sky On Jump Theory: 101." An In Depth And Informative Revealing Of The Secrets Held By Some Of The World's Best Jumpers. You Can Improve Your Understanding Of Jumping And Improve Your Ability To Jump Using "Sky On Jump Theory: 101." A Must Have For Developing Athletes And Coaches.