Originally Posted by
big john
Don't worry about how much others drink, you have to do what works for you. I almost always drink more than people I ride with and will easily drink a litre an hour on a hot day. On long climbing days I have downed over 200 ounces and still lost weight.
I weigh myself after hot rides to help gage dehydration.
Right, you won't over-hydrate. At the 40 mile stop of a metric century on a hot day I felt terrible until I downed 60 ounces of Gatorade. Didn't even start feeling good until two/thirds through that bolus, and did great for the rest of the ride.
My main concern in the heat at age 53 is heart attack. I'm sure you don't have to be advised to know the warning signs and to have at least an occasional relationship with a cardiologist.