I actually don't sweat overly much. I just get overheated, very warm that I almost can't stand it. I almost feel like I can run naked, drenched in ice water, then I'd finally be comfortable! My face gets hot to the touch and bright red, my legs and core get unbearably hot too.

I bring along a waterbottle and just take swigs from that every quarter mile or so. I'll probably get a camelbak sometime this year, but I just don't have the miles right now to warrant it (both in running and biking).

The arm coolers are a good idea. I may get those for the races I'm going to do this year.