Each of the 14,000-plus individually owned and operated CrossFit affiliates around the world is a laboratory for human performance showcasing the measurable, observable, and repeatable outputs that form the bedrock of our program. If you want to geek out on exercise science or physics equations, CrossFit can provide you endless data showing the efficacy of the program. But if you really want to understand the magic of it all, just step into a CrossFit affiliate and talk to a member.