Dunno if this helps but a good friend was a speed skater at the highest levels of international competition (world cup, missed two Olympic teams) and while she didn’t have any specific problems that I recall, she was careful about watching her drink on the ice, etc. So she clearly thought it was enough of a concern to warrant being concerned.
I mean, consider some of the bigger stuff we know goes on (e.g. Tonya Harding/Nancy Kerrigan); in the cuthroat world of elite sport…