Like many, I suppose, my idea of rehydrating and nutrition was a bottle of Gator Aid and a Snickers bar at the turn.
As I have aged, I now need at least 3 bottles of water per round (actually 4, as I drink one on the way to the course) and
a couple of nutrition (protein) bars and/or an apple. As the temp rises, I try to really hydrate before I get on the course.
Rule before and while playing: No beer, no candy or chips