I had this one in an anthology which I think I passed on many moves ago. I remember reading it first in the 80s, but it is likely older, as my mother was a school librarian and allowed me to pick from her culls.
The sport is something like bobsled-cross; competitors in sleds run down an ice track, multiple competitors at a time. It is very dangerous - fatalities are common. The two things I remember about the sleds is that they had deployable wings that could help manoever and regulate speed, and a finite number of nose rockets they could fire to slow them down drastically to avoid leaving the track or collisions.
The other thing I remember about it is that, due to the high risk, a fatalistic attitude was endemic among the competitors, and the response to most questions was "it's possible", or something like it.
The story was one competitor's thoughts during one particularly harrowing run, with explanatory sidetracks as needed.