Three rounds. Heat, cold, rest. Drink water. That’s the whole thing.
Everything else you’ll read about sauna — the breathwork tips, the biohacking protocols, the heat-stress optimization frameworks — is commentary. Useful commentary, maybe, eventually. But not what you need for your first session, or your tenth.
Here’s what you actually need to know.
Before you go in
Eat something light an hour before, or don’t eat. Don’t go in full. Drink water — not because you’re about to sweat (you are), but because you want to start the session already hydrated. Shower before you enter the sauna room. Every real sauna culture has this rule. It keeps the bench clean, it opens your pores, and it’s just good manners.
The first round
Sit on the lower bench if the heat feels intense. It’s cooler down there — maybe 10–15°C cooler than the top bench, it depends on the sauna. Spend a few minutes just letting your body adjust. Don’t force it.
If there’s a “keris” (the stove, the one with actual stones on top), you can throw water on it. One or two ladles is enough for the first round — not three or four. The steam rolls off the rocks and raises the temperature fast. Your lungs will register it before your skin does. Breathe through your nose. It makes a real difference.
Stay for 10–15 minutes. Leave when you feel done — not when you hit a time limit, not when the person next to you leaves. Your body knows. The signal is usually a kind of restless warmth, like you’re just slightly too full of heat. OR if you need to drink water, that’s always good.
Get out.
Between rounds
This part most people rush, and it’s where most of the benefit actually lives.
Cool down. Cold shower, cold plunge, cold air — whatever’s available, in that order of preference. The cold plunge is the real thing: full immersion, water at 0–5°C, for 30–90 seconds. Your nervous system will stage a brief protest. Stay in anyway. When you get out, everything feels different. Maybe even dizzy.
If there’s no plunge, a cold shower works. If it’s winter and you’re somewhere sensible, step outside.
After the cold, rest. Sit somewhere. Do nothing. Five to ten minutes. Don’t skip this. The rest between rounds is where the nervous system actually resets — the heat opens the gate, the cold closes it, the rest is the walk-through.
Drink water.
Rounds two and three
Go back in. The second round you can push harder — top bench, more löyly, longer if you want. By the third round you’ll know what your body can handle. Most people find three rounds is the number. Some do two, some do four. Trust yourself.
After the last round, take your time cooling down completely before you dress. Don’t rush back into the city. If the place allows it, sit outside for a while.
The thing nobody tells you
The sauna doesn’t do anything dramatic. You won’t emerge transformed. What happens is quieter: somewhere around the second round, the part of your brain that’s running background processes — the to-do list, the mild anxiety, the low hum of being always reachable — goes offline. Not because you forced it. Because the heat asked it to.
You’ll notice it when you walk out. The air tastes different. Your shoulders are somewhere near your body instead of up around your ears. You’re hungry in a clean way.
That’s it. That’s why people do this twice a week for fifty years.
Go try it. Report back.
