15 Sauna-Sicherheitstipps, die jeder Nutzer kennen sollte

The Finnish studies showing extraordinary health benefits from regular sauna use involve healthy adults who use sauna sensibly. Sauna misuse — going in drunk, staying too long, ignoring the body's warning signs — can cause fainting, cardiac events, and in rare cases, death. These are preventable outcomes.

Here are the fifteen safety rules that every sauna user should internalise.

1. Never Sauna While Drunk

The most important rule. Alcohol impairs the body's ability to regulate temperature, impairs judgment about when to leave, and significantly increases the risk of fainting and cardiac events in combination with sauna heat. No alcohol before or during sauna. Full stop.

A cold beer or saunakalja after the final round is a different matter — traditional and harmless.

2. Hydrate Before, During, and After

You will lose 500ml–1,500ml of sweat in a typical sauna session. Dehydration amplifies every sauna risk — headaches, dizziness, nausea, and fainting. Drink at least 500ml of water before starting and continue to hydrate in the rest periods between rounds.

3. Never Ignore Warning Signs

The body sends clear signals when enough is enough: dizziness, nausea, rapid uncomfortable heartbeat, pressure in the head, visual disturbances. Leave immediately when these occur. They are not weakness — they are your autonomic nervous system protecting you.

4. Cool Down Properly Between Rounds

Do not go directly from one round to the next without cooling. The cool-down phase allows your cardiovascular system to recover. Skipping it cumulates heat stress and significantly increases fatigue and faintness risk.

5. Start Low, Go Slow

Begin on the lower benches where temperatures are 15–20°C cooler than near the ceiling. Start with 8–10 minute rounds. Increase duration and bench height over multiple sessions as your body adapts.

6. Do Not Go Alone for Your First Visits

Your first few sauna sessions should ideally include at least one other person, or take place at a staffed public venue. Understanding your body's response to heat takes time — having someone present who can assist if needed is sensible.

7. Do Not Sauna With a Fever

If your body temperature is already elevated by illness, adding sauna heat is counterproductive and potentially dangerous. Wait until fully recovered before resuming sauna use.

8. Avoid Immediately After Intense Exercise

Your heart rate and body temperature are already elevated after intense cardio. Adding sauna heat immediately after a hard workout stresses the cardiovascular system beyond the safe zone. Wait at least 20–30 minutes.

9. Pregnant Women Should Consult a Doctor

The research on sauna during pregnancy is mixed. Some Finnish studies suggest moderate sauna use in the first trimester is safe for women who were regular sauna users before pregnancy; others are more cautious.