I had stomach issues last year. Threw up every time I tried to drink while exercising.
Rode Trollstigen Climb (700m accent) totally dehydrated. Then sat for a while and managed to get 400ml of water to stay Down. Re-did the Climb and it was like having new legs.
Its mainly after that that I've focused on drinking more. I used to just wait untill I was thirsty.
I've always ridden and raced dehydrated. It's easier for me over here with the much lower temps. It's too personal to really offer advice on though - what I drink would have some people dying by the roadside and what you drink might turn me into a fish. I try and stick with weighing before and after while noting the temperature and then working around that. Over here it means 500ml per hour, normally. But that's hard to do when you don't have support and don't want to stop to refill bottles.
I've always ridden and raced dehydrated. It's easier for me over here with the much lower temps. It's too personal to really offer advice on though - what I drink would have some people dying by the roadside and what you drink might turn me into a fish. I try and stick with weighing before and after while noting the temperature and then working around that. Over here it means 500ml per hour, normally. But that's hard to do when you don't have support and don't want to stop to refill bottles.