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by gjulianm 70 days ago
I 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.

3 comments

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.
If you want to experience positive health effects from sauna, you don't have to set records in heat and duration. You just get hot and sweat as much as you feel is fine. So you can do it in almost all conditions. Sweating out bad stuff from your body, activating the blood flow, unless you are at risk of a aneurysm - of course it is beneficial, even though it doesn't magically turn your health around. But a proper sauna and ice bath do revive and make you feel reborn. Try it at least at some point and then you can judge if it did not make you feel more alive and healthier and that all the studies around it a "probably bullshit".
There are two separate issues there. One, you feeling good about going to the sauna. If you feel good, that’s nice. But it’s your personal feeling from it. I personally did not have the same opinion about my lungs feeling as I was breathing fire, but to each their own. I’d rather do other nicer things to activate blood flow and feel revived.

The other is the health benefits, and that can only be measured from serious studies and not from how you or me feel about it later.

Feeling good and with lasting energy is pretty much the same as having good health.

"The other is the health benefits, and that can only be measured from serious studies and not from how you or me feel about it later."

Yes and there are studies, so do you have anything concrete why they ain't beneficial, besides your personal dislike?

You lead with "Basically, the sauna studies are probably mostly discovering that "healthier people can stand sauna longer" that implies you did not even read them. (Besides, allmost everyone goes to Sauna in the nordic countries, that implies allmost everyone there is healthy by your logic)

But if Sauna for you was breathing fire .. one easy solution is to go to a less hot sauna.

> Feeling good and with lasting energy is pretty much the same as having good health.

I'm referring to feeling like that specifically after the sauna. I also feel great after eating a great steak and yet it's not the same as having good health.

> Yes and there are studies, so do you have anything concrete why they ain't beneficial, besides your personal dislike?

> You lead with "Basically, the sauna studies are probably mostly discovering that "healthier people can stand sauna longer" that implies you did not even read them.

Not that they are not beneficial, but that the benefits are not as large as they are assumed to be. The main reason is that there are no randomized trials and practically no replications outside of nordic countries. Also, if you compare the risk reduction reported by sauna use to other health interventions, you'll quickly see that it doesn't really make that much sense. Depending on the studies, you'll see risk ratios that say that frequent sauna use is as effective (or more) as doing high intensity exercise or smoking cessation.

> (Besides, allmost everyone goes to Sauna in the nordic countries, that implies allmost everyone there is healthy by your logic)

Actually, you have that backwards. If finnish people go so much to the sauna compared to other countries and it's as good as the studies say, why are they not much more healthy than other countries? Prevalence of cardiovascular disease in Finland is pretty similar to other countries. Same with life expectancy. There are two options: either the finns are doing something radically different from other countries that negates the benefits from sauna use; or the risk reduction shown from the studies is not real.

The most likely explanation is that sauna provides similar benefits as any of the other interventions based around mildly stressing your body: somewhat beneficial but nothing magical, with probably an additional, significant placebo effect.

> But if Sauna for you was breathing fire .. one easy solution is to go to a less hot sauna.

Another easy solution is to not go to a sauna and just do anything else that's beneficial to me in that time and not extremely uncomfortable. I already live in Spain, I get more than my fair share of hot uncomfortable environments.

"I already live in Spain, I get more than my fair share of hot uncomfortable environments."

Well yes, that might be enough, which might be the reason there ain't so many saunas in spain, but lots of them in colder climates. (I don't go to Sauna in summer either)

So yes, to be precise, the general statement "Sauna is good for you" is probably not true in general. There are also lots of other factors, the individual tolerance to heat and your heart condition(at times I enjoy 110 degree Sauna for a long time, but if I am weak, 60 degree can already be too much for more than a few minutes), then the general atmosphere in the Sauna, is it clean, are there nice people or people you feel like getting their diseases from by sharing the same room and sweat, ... in short, do you feel safe and comfortable there (placebo is real, but so are germs).

So in general, if you don't enjoy it, don't go. But also spain can be cold I experienced, so I do recommend to try out the heat effect in a controlled environment if you have the opportunity for a nice Sauna where no one pressures you to endure more than you want to.

My partner is also from a warmer climate and she did not like Sauna first, but step by step she now enjoys it.

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.