What's Holding Back the long jump runway Industry?

http://elliotgokx049.angelfire.com/index.blog/1652274/addicted-to-long-jump-runway-us-too-6-reasons-we-just-cant-stop/

Having a strong vertical leap is essential for increasing your level of play in a sport like basketball. Having that ability allows you to rebound over the bigger men, prevent having your shots obstructed, and