Back in the day, endurance athletes were taught that thirst was a fairly accurate indicator of hydration status. All that changed about 30 years ago, as an article in the British Journal of Sports Medicine points out, when trainers and coaches started urging distance runners and cyclists to consume lots of water and sports nutrition RTDs regardless of whether they were thirsty or not.
Excessive fluid consumption was supposed to help prevent the onset of dehydration and heat stroke. Unfortunately, in extreme examples, this practice can also lead to a condition known as hyponatraemic encephalopathy (EAHE), more commonly known as water intoxication.
It turns out that the old approach of drinking when thirsty might have been better advice. Remain aware of your body's needs during intense exercise, and remember that more isn't always better. Endurance cyclists looking to get more mileage out of their efforts might benefit from saddle placement research outlined on the Breaking News at optimumnutrition.com