alt Hacker NewsI doubt they would replicate it or any of the magical effects of saunas. Lots of the sauna studies suffer from the same issue where people self-report sauna usage rather than being assigned randomly to a treatment group. In countries where saunas are readily accessible and most people are under the impression that the more you use sauna the healthier you are, the ones that use the sauna less are probably because they tolerate it far worse. And that's probably related with age, comorbidities, physical condition, etc.
Basically, the sauna studies are probably mostly discovering that "healthier people can stand sauna longer". In countries where most people don't stand sauna for more than a few minutes, that self-selection bias won't exist.
Replies
I don't know about that. As in yes I agree but that seems to apply to Western countries in general. For example in Tunisia, people go to public baths at least once a week and part of that involves sitting in a hot steamy room for 30+ minutes. So here you have an example for a population that does use sauna (in a way) but aren't relying on self-reporting.
Also location. In my country, saunas at home aren't as common in Finland, but basically every gym has one. So the people that use the sauna the most, are likely to be the most active.