What kind of training does someone in a Nascar pit crew go through?

May be...

Nowdays, most of the teams have trainers and coaches for their pit crews. Not only do they work on their physical conditioning, they time and video tape the stops from the races and then critique individual performance in much the same way football teams do. They practice a lot, to keep muscle memory sharp and to make it 2nd nature to them. With the cars being much closer these days, great pit stops are one of the best ways to gain spots on the track.
4's FINE N 09!!!!

Weight lifting, go out and practice changing tires and etc trying to get a faster time.

Work at a gas station or Jiffy Lube for a couple of months.

Hey Storm, here's another article for you that goes into detail that you might like about pit training. Instead of copying and pasting bits and pieces of the story I'll just give you the link instead.
http://www.circletrack.com/techarticles/...

rigorous. very rigorous and vigorous.
and fast.

They have practices that are vigorous. There work-out schedule is probably similar to that of a NFL player.lufstansa airline