I always wondered about these race car drivers. I imagined in the days of old amphetamines was the drug of choice, it is a sport of nerve and reaction, like a WWII fighter pilot really. Now who knows?
Down here at Laguna Seca I saw the Champ Car guys, very wiry, exactly like jockeys, or cyclists. I could tell they were similar to cyclists, however moreextremely high strung, almost as if they were jumping out of their skins.
The LeMans drivers, different, more gentlemanly, elegant, relaxed.
The fotos I have seen of NASCAR drivers, they look pretty much the same as the Champ Car drivers, even Danica Patrick, asexual, whippets.
The other thing about the NASCAR and other motor sport drivers is the extreme strength required of them to drive, and extreme physical conditions in the car.
Noise, G forces, heat, terror, monitoring many mechanical conditions at once, etc.
Cycling is a much more pure sport. More effective with doping I would imagine.
I could see using only steroids(very carefully monitored by a physician) and coffee or mild stimulants in NASCAR. One really needs to have an inner calm to race one of those buggies.