My teacher used a couple examples of real life water intoxication and his description of these evensts left me a little confused. One event he mentioned was a marathon on a cloudy, cold day where the runners were drinking despite the fact that they weren't sweating. My understanding was that sweating actually increases your chances of water toxicity because you lose electrolytes, thus lowering your body fluids' osmolarity. Another event was the recent death of a women who entered a contest where the participants have to drink a ton of water and not urinate (dumb, I know). In this case he mentioned that it had to do with the fact that she was holding her bladder, wherease I would've thought that part of the story would not affect her risk of water toxicity. Am I missing something here or do these examples actually kind of miss the point when explaining this condition?