There are athletics events at the olympics... track and field. But generally all olympians are referred to as olympic athletes...

Drivers are fit, but I do think there are a lot fitter... as I said Aussie Rules guys (some run a half marathon in distance per match), Iron Men and Women, and the Tri-Nations rugby union teams (although it might be best to focus on the Backs and stay away from the Hookers (look that term up), and of course the League teams, and Womens swiming team etc.