I grew up in Lousiana and couldn't do anything physical from about May to thru Sept.
I live in southwest virginia and it's not nearly as humid and I still get overheadt mountain biking in 80F weather.
I'm trying to improve my heat tolerance. I don't sweat much. I've tried Endurolyte tablets (Hammer Strength), which help. I think I sweat a bit more when taking them.
WHAT I'VE TRIED
- I also use HEED (also from Hammer, and I've used Gatoraid but I think HEED works a bit better).
- Endurolyte electrolyte tablets from Hammer.
- Evaporative cooling "collar" that goes about 4" down my back, shoulders and chest.
But even with all of the above I don't think I sweat enough and get overheated fairly easily. And If I don't stop, I'll get a really bad migraine. (The Endurolyes allow me to stop when a migraine is impending and not get the migraine. Without the Endurolytes, the migraine would be ineveitable once I "sensed" it was near)