Seems like I often have this happen to me..even if I hydrate myself well during any long ride. Usually it's a ride over 80-100 kms. long.

I make sure I drink / have alot of fluid too at supper. And have so much that I am bloated and happy-full with other food too.

Next morning I wake up noticeably dehydrated..enough in the throat, etc. I'm not dizzy or anything.

But there's not much more fluid I can ingest the evening before. Is everyone else like me?