[[quoteright:208:http://static.tvtropes.org/pmwiki/pub/images/cramps_4661.png]]

->''"But most importantly, after you eat, wait three full days, get a complete physical, have an ear candling, and press UP, A and START before re-entering the pool."''
-->-- ''[[WebAnimation/HomestarRunner Strong Bad]], on pool safety''

Let's say you're going swimming at the beach or pool, when suddenly, hunger strikes. After eating, you jump into the water, but experience a stomach or muscle cramp, causing you to struggle to stay afloat. If you're ''really'' unlucky, you might drown.

Looks like you should have waited at least 30 minutes or an hour after eating!

This is an old wives' tale that has long been [[http://www.snopes.com/oldwives/hourwait.asp debunked]]. While swimming cramps are not rare, and stomach cramps caused by the direction of oxygen away from the stomach muscles are debatable, there have been no reported cases of drownings or near-drownings from them. [[FridgeLogic Why the stomach would be so sensitive to post-meal cramps when you're swimming, yet fail to suffer them if you're exercising out of the water, is never explained.]]

The best thing to do in the event of a cramp suffered while swimming is to relax and tense the affected muscle, or stay afloat until help arrives. Otherwise, feel free to satisfy your cravings by the water.
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!!Examples:

[[AC:Advertising]]
* A Slim Jim commercial featured a man eating the product, then jumping into the pool. The personification of the Slim Jim (now in his stomach) tells the swimmer that he should have waited it out, causing both to suffer the consequences.

[[AC:Comic Books]]
* This happened to Wally Walrus in an issue of the ''AndyPanda'' comic book.

[[AC:Film]]
* In ''Film/ThePrincessBride'', Miracle Max and his wife Valerie warn Indigo not to let Westley go swimming for an hour after he takes the ressurecting pill of life. Never mind that he's mostly paralyzed for the rest of the day.
* Lampshaded in ''WesternAnimation/IceAge: Continental Drift'', where Sid begs a kangaroo not to throw him overboard since he had to wait an hour before swimming since he ate recently.
--> '''Sid:''' What, you want me to walk into the water? I can't because I ate less than twenty minutes ago and you know the rule!
--> '''Raz:''' ''(Crossly)'' That's a myth!
--> '''Sid:''' ''(Uneasily)'' Oh, okay...as long as it's safe.

[[AC:Literature]]
* In ''ASeriesOfUnfortunateEvents'', Aunt Josephine tells the Baudelaries that they must wait one hour after eating before swimming in Lake Lachrymose. [[CuteBookworm Klaus]] initially assumes it's because of cramps, but Josephine informs him that it's actually because of the lake's [[KillerRabbit carnivorous leeches]].
* ''Literature/ATaleOfTimeCity'': Jonathan and Sam's parents hold them to this during the picnic at the lake.

[[AC:Live-Action TV]]
* Adam and Jamie on ''Series/MythBusters'' debunked this, as well.
* Same with ''Series/PennAndTellerBullshit''.
* An episode of ''SmallWonder'' had Ted stage his own drowning by cramps to get rid of his NosyNeighbor's alleged [[IOweYouMyLife life debt]].
* Exaggerated in a ''TheState'' sketch. Someone at a barbecue goes swimming and gets a cramp. One after another, everyone at the party jumps in to save the drowning people and gets a cramp.
* In an episode of ''TheBigBangTheory'', a character mistakenly thinks this applies to having sex after eating.

[[AC:Newspaper Comics]]
* ''TheFarSide'' had a young snake with a large lump in his belly attempt to go swimming at the beach. His mother tells him to wait a whole week before going in.

[[AC:Western Animation]]
* On ''TinyToonAdventures'', Calamity Coyote works as a lifeguard at a pool. After he sees Hamton eat something and try to get in, Calamity warns him ([[TalkingWithSigns with a sign]]) to wait 30 minutes. Hamton shrugs it off, and as soon as he dips his toe in the pool, he gets cramps all over and falls in.
* In the ''{{Goofy}}'' cartoon "How to Swim", Goofy's changing cabin falls into the water while he's inside and ends up walking out, setting up a picnic area and eating a full meal without being aware that he's underwater. The narrator points out the rule of waiting before eating and warning about cramps, which appear as knots all over Goofy's limbs and body.
* In one ''[[WesternAnimation/DastardlyAndMuttleyInTheirFlyingMachines Magnificent Muttley]]'' segment Dastardly orders Muttley to clean the pool since he wants to go swimming after lunch. He never gets into the water though as he gets bounced repeatedly between the two-level diving board.
* On the ''WesternAnimation/PhineasAndFerb'' episode "The Lake Nose Monster", the captain of the titular lake decides to go for a swim after eating a hot wing, saying that this old wives' tale was just a hoax and they keep it alive so they could sell snowglobes of a kid getting a cramp. He steps into the water and gets a cramp just as Phineas, Ferb, Perry, and Lawrence in the [[Film/CitizenKane Nosebud]] are about to hit him.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': The episode "Billy Ocean" has Billy eating a crab named Ziggy (an {{expy}} of [[Disney/TheLittleMermaid Sebastian]]) and, a minute later, suffers a stomach cramp.
-->'''Billy:''' I shouldn't have gone swimming after I just ate.
-->'''Ziggy:''' ''(from inside Billy's stomach)'' Serves you right, mon!
* Exploited in the ''WesternAnimation/SpongebobSquarepants'' episode "[=SpongeGuard=] on Duty", where [=SpongeBob=], being a substitute lifeguard who can't swim, finds a way to not go into Goo Lagoon by having people come out of the lagoon to get free ice cream, then reminding them that they have to wait an hour to go back in after eating. And to make absolutely sure they don't go in, he wraps everyone up in police tape.
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