CrossFit is a giant, efficient experiment conducted in garages, affiliates, and parks all around the world. As best practices permeate the community, we learn — and implement — what really works for our athletes. The results we experience when we put in the work and commit to CrossFit’s fitness recommendations feel like magic. An 80-year-old who performs squats and sled pushes with athletes in their 20s may look like they’ve found a fountain of youth or some other such sorcery to someone who is unfamiliar with our program and our community, though we know the formula that got them there. We have transformed the paradigm for aging — we’ve witnessed countless transformations, both mental and physical in nature. And we’ve heard from scores of athletes who have used CrossFit to slow, combat, or reverse a range of chronic diseases they believed would result in their inevitable decline. Such stories may seem anecdotal and even magical in isolation, but collectively, they supply the data that shows the CrossFit formula works.