At the gym this morning a woman told her grandson, before he went outside, to be sure to hydrate. When I was a Little Leaguer, we were told not to hydrate on hot summer days because of the possibility of cramps. The term back then was "drink a lot of water."
We were also told not to swim after eating, as that would surely give us cramps. Lately, because of the time the pool ends up in the shade, I have been swimming immediately after dinner. I haven't felt anything close to a cramp, though I have occasionally felt like throwing up. Perhaps vomit was what those lifeguards were worried about.
