Originally Posted by koala logs

That's interesting. I never felt the need to pee on long rides. My bladder just never fills whenever I'm doing hard exercise. I'm probably "sweating" my pee already through my skin! That's why I don't stop if I can help it and mostly, it would be due to mechanical problems.

I don't think I have hyperhidrosis. I only sweat slightly above average on a hot summer day if I'm only doing day-to-day activities, no exercise. Same thing if I'm doing recovery rides. The moment I hit zone 3 or zone 4 that's when I begin to sweat like rain. I think it's a good thing for me, at least I don't have to wet my shirt with water on a hot day. I happen to hate hot climates so the extra sweating helps.

My ancestors lived ~4000' above sea level in the mountains. We've visited our ancestral place and it never gets hot there even in the summer (temperatures can still drop to 50F even in June / July). One of our national tour champions lived in the same region. In fact, it feels like the climate is perfect for me. I suppose that would explain why several in the family sweats a lot in exercise like I do and also hates the heat.