The Risks of Hydrocution After Eating
What’s the risk of swimming right after eating? Parents who make their children wait before going for a swim fear what’s known as “hydrocution.” This term refers to thermal shock—that is, a very warm body being immersed in a cold environment (water). Waiting for digestion to complete is therefore said to prevent this so-called “thermal shock.” But digestion takes about 3 hours, and the rise in body temperature isn’t high enough to pose a real risk of thermal shock; the danger, therefore, doesn’t come from that!
The Risks of Sun Exposure in the Early Afternoon
In reality, it’s sun exposure in the early afternoon (the hottest time of the day) that’s dangerous. In fact, suddenly diving into cold water after being exposed to intense heat can cause discomfort. Furthermore, early afternoon is when you’re most likely to get sunburned, which is particularly risky for children.
What advice should you give your children?
This popular piece of advice was actually correct—but not for the right reasons! Waiting until the end of the day to go swimming is therefore perfectly sound advice. The water temperature has risen, UV rays are weaker, and therefore less harmful to the skin. Furthermore, as mentioned earlier, after a hearty lunch, body temperature rises as part of the digestive process, so the water feels cooler. We therefore recommend taking a nice nap in the early afternoon! In any case, teach your children to enter the water slowly, to wet the back of their neck, forehead, and stomach before submerging completely, and above all, stay close to them and watch them at all times. And as for your teenagers, be sure to make them aware of the drowning risks associated with alcohol consumption!