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Dr Gérald Kierzek (Medical Director)
Like every year before going swimming, you have probably heard someone advise you to wet the back of your neck before entering the cold water. But is it really a good idea? Dr. Gérald Kierzek, emergency physician, answers your questions.
To escape the heatwave and enjoy the summer season, many vacationers head to sunny regions near lakes, rivers and the sea! While taking a dip is the best way to cool off, some recommend moistening your neck before jumping into the water. But is this method reliable or is it just an urban legend? Discover the answer from Doctissimo’s medical director, Dr. Gérald Kierzek.
A gesture to prevent hydrocution
According to Dr. Gerald Kierzek, wetting the back of your neck before entering the water is very important because it helps prevent hydrocution. “Hydrocution is a discomfort that can occur when the body experiences thermal shock upon entering much colder water.” he explains. If it is too sudden, this phenomenon can be very serious and lead to potentially fatal complications, such as cardiac arrest or serious respiratory problems.
So, “wetting your neck before entering the water will help your body gradually adapt to the water temperature, thus reducing the risk of hydrocution”, continues the medical director. Indeed, “This gesture helps regulate the flow of blood to the heart and brain, thus facilitating the body’s adaptation to the temperature of the water and improving its cooling system.”
This is especially important during very hot weather!
Other tips for safe swimming
In addition to moistening the back of your neck, other simple precautions can help make swimming more enjoyable and safer, especially for those who are sensitive to temperature changes. Dr. Kierzek shares his advice:
- Avoid eating a large meal before going into cold water;
- Avoid drinking too much alcohol, which should obviously be consumed in moderation;
- Do not expose yourself during the hottest hours but rather during the morning or at the end of the day;
- Always remember to protect yourself from the sun and drink enough;
- Finally, when you enter the water, go gradually and always with someone!
- If you feel unwell, get out of the water as soon as possible. After getting out, cover yourself with warm, dry clothing to gradually warm your body, and remain under supervision.
Slide: First aid kit: summer vacation essentials