T Rex - I had complete Kidney failure & had to have 32 bags of saline before my kidneys kick started again. The doctors could not say if the condition was as a result of a race I was in or if it has been building up over time (not enough research has been done with ultra runners).
The irony is during the race my hydration and electrolyte replacement was right on the money, so my conclusion is this had been building for a while. If this had been my first 100mile race I would understand but I have several 100+ miles under my belt.
It really makes you think, I had this kind of "I am bullet proof " perception and I think a lot of Ultra runners have the same sort of attitude which can be dangerous. Especially when used in a race situation where you have the attitude of I will finish this race regardless, I know I have been there and done it. I guess I am going to be a lot more cautious now, the danger in someways is could it make me over cautious though, I guess time will tell.