"The old feeling was that, after you eat, some of the blood may be diverted to your gut so that you can digest, diverting the bloodstream away from your arms and legs," he says. "And you may get tired or fatigued, and be more likely to drown."
But is this recommendation to wait based on fact or fiction?
» New report reveals danger of childhood drownings in open waters
"We know now that really there is no scientific basis for that recommendation," Boniface says. "You may end up with some stomach cramping or a muscle cramp, but this is not a dangerous activity to routinely enjoy."
So, while it may not be the most comfortable thing to go for a swim with a full belly, the world won't end if you ignore your mom's advice — just this once — and don't wait 30 to 60 minutes after you eat to get back in the water.