In a sufficiently large population you can find individuals who will thrive under any given training regimen. In weightlifting the Russians would find those who

In a sufficiently large population you can find individuals who will thrive under any given training regimen. In weightlifting the Russians would find those who did best under Russian methodologies; the Bulgarians would find those who did best under Bulgarian methodologies and so on. And speaking of the heyday of Russian and Bulgarian supremacy, Crossfit doesn't submit to WADA jurisdiction and the non-competitors don't even get tested by Crossfit.