Every racer I ever saw getting out of a car (or truck) was soaked in swear and clearly ‘exerted’ if not outright tired. Even the local limited lap events are pretty demanding. It gets pretty hot in there with no insulation on the floor/firewall.
Years ago one of the off-road magazines ran a series on one of the sport’s biggest name stars of the day, Ivan “Ironman” Stewart and his physical training routine. Most race fans have probably heard the name somewhere along the lines - Toyota truck commercials, video games etc. It was pretty much Olympic caliber training stuff. Stewart got the name from racing, and repeatedly winning, the Baja 1000 solo.
He was far away from ‘not an athelete.”
Better yet strap him in a passenger's and leave him there for an entire race at Daytona.
That would end his stupid tweets about NASCAR Drivers.