Originally Posted by
corbett1010
On the other hand, some professional marathon runners hydrate before a race and don't drink a thing during it. They rather be dehydrated at the end of a race then slow down for liquid or upset their stomach.
What is appropriate for a professional elite athlete who (hopefully) has spent a lot of effort/time working out the details of what works to compete in a 3h race might not be appropriate for everybody.
Certainly, bicycle racers drink during races.