The way Finns do it they take a hot Sauna in the winter and when they get out of the hot-room they go lay naked in the snow. Or plunge into the frozen lake through a sawed-out hole. Then they go back to the sauna again to feel the warmth again. It does feel great and stops you from dwelling in miserable thoughts. That may be part of the reason why Finns are ranked happiest people for multiple years.
The way Finns do it they take a hot Sauna in the winter and when they get out of the hot-room they go lay naked in the snow. Or plunge into the frozen lake through a sawed-out hole. Then they go back to the sauna again to feel the warmth again. It does feel great and stops you from dwelling in miserable thoughts. That may be part of the reason why Finns are ranked happiest people for multiple years.