Carbonfiberboy
In the more recent article it was interesting the mention of sodium reduction in sweat as the HEAT group became better acclimated to the higher temps. I never crust up my clothes with salt when I sweat in the heat like some that I know. But all my life I've never shied away from working or exercising high temps. I tend to use a little more salt or electrolyte in my bottles if I've not been in the heat for a while but that goes back to normal amounts when I feel decent about the heat.
Not sure about the rectal temps. I don't want to go to that extent so we all can make some comparisons.... <grin>