These Athletic Propulsion Labs shoes were so effective at increasing player performance the NBA banned the Boston Celtics from wearing them. Now, these YouTubers show you what gives these sneakers their power.

In 2009, the Boston Celtics wanted to wear Athletic Propulsion Labs (APL) super sneakers during the playoffs and the NBA said no, outright banning the shoes. According to APL, this is because these shoes feature “Load ‘N Launch®” technology that provides instant INCREASE in vertical leap.

The APL describes the tech as such: "Load ‘N Launch technology works in concert with the rest of the shoe so that there is uniformity in the compression or the pressure that the athlete exerts down onto the device itself and through the midsole of the shoe, which is the “load” cycle. After all the compression elements are fully flexed, there is an explosive “launch” cycle that results when all of that compression is released. The result is an instant increase in vertical leap."



The shoemakers also report that their sneakers have been extensively tested in a leading West Coast University Biomechanical Lab. However, although the APL Concept 1 shoes were banned by the NBA for the 2010-2011 season, it should be noted the ban was lifted in February 2011.

Still, the company does warn that: "the Concept 1 shoes may or may not be allowed for competitive play in your league at the college, professional, or recreational level." And according to the What's Inside? family's son, the shoes should still be banned by the NBA.

Watch the video for yourself, find out what is inside these nifty shoes, and let us know if you think they should be banned or not.