Winter swimming: Exposure to cold water boosts the immune system

Swimming when the temperatures are low is very popular in Switzerland. However, there are some rules you must observe when swimming in the winter. You can find out what they are in the health tip.

Olivia Fey
AuthorOlivia Fey
2 minutes reading time11. November 2023

If you're out for a winter stroll and encounter someone in their swimming costume, you may not believe your eyes at first. But a pastime that's almost the norm in Nordic countries is now also becoming increasingly widespread in Switzerland. More and more people are swimming in lakes and rivers in winter.

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Cold stimulates circulation

This cold-weather hobby boosts the immune system. The cold water causes the blood vessels in the skin to contract, while more blood is directed to the body's vital inner organs. Your circulation is boosted, your heart rate and blood pressure rise, and your body releases adrenaline. But you only build tolerance and experience the positive benefits if you expose yourself to the cold regularly.

Winter swimming puts your cardiovascular system under significantly greater strain than a sauna. Individuals who suffer from high blood pressure, peripheral arterial occlusive disease (PAOD), cardiac dysrhythmia or any other illness that is aggravated by exposure to low temperatures should avoid swimming in cold water. Those with other chronic diseases should consult their doctor first.

Important tips for winter swimming

To make sure your cold-water dip has a truly positive effect on your health, you should observe the following tips:

  • Don't drink alcohol beforehand, and get into the water slowly rather than jumping right in.
  • Always stay close to the shore so that you never get out of your depth. Never swim alone, but always in pairs or a group.
  • Protect your head with a cap and don't go under the water. About a third of body heat is lost through the head. Hands and feet can be protected with neoprene shoes and gloves.
  • If you feel unwell or have muscle cramps, leave the water immediately.
  • The rule of thumb is that you shouldn't stay in the water longer than the water temperature in degrees Celsius (for example at 6 degrees you should limit your swim to 6 minutes or less).
  • After your swim, warm up slowly: dry yourself thoroughly and put on warm clothes, but don't exercise immediately afterwards.
  • Don't jump straight into a hot shower.
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Topics in this story:
Outdoor
Prevention
Swimming

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