Surprisingly, I'd argue that athletes are an example of fierce nerds. I think people vastly underestimate how nerdy top athletes are. They're people willing to devote their entire lives to obsessively analyzing a single game. Somebody like Jordan had to spend hours, days, years of their life just constantly shooting a ball at a basket. Not to mention the obsession with meta and strategy. We like to see people like Jo…
To bodybuilders (and I assume, also athletes), eating in a methodical and structured way is an important part of their job. The guy grew his own vegetables and spent a lot of time selecting food at markets, ate at very specific times, etc.
That, combined with supplements, experimenting with different training regimes, etc... it's a lot of experimentation and certainly there's a lot of cognitive work behind all of that.
I found this very interesting.