Lifting - to flex or not to flex? JC is gonna show you why most of the recommendations you have been given are wrong, or at least NOT COMPLETELY TRUE. You hear all of the fear mongering with back position during various lifting movements. This video will break down the truth of lifting mechanics, and IT’S NOT WHAT YOU THINK!! JC really goes out on a limb with this one. But, that’s just where he likes to teach - on the edge.