As always, correlation does not equal causation. The article doesn't claim that it does. That's why the title was specifically constructed to use the phrase "

As always, correlation does not equal causation. The article doesn't claim that it does. That's why the title was specifically constructed to use the phrase "association between" (rather than "causes" or "is caused by.") What kind of person can financially afford, or make time for, 4 to 7 sauna visits per week? The kind that has access to a sauna in their own home. Which is quite common in Finland, apparently: "There are five million inhabitants and over three million saunas in Finland - an average of one per household."[1] [1] https://en.wikipedia.org/wiki/Finnish_sauna https://en.wikipedia.org/wiki/Finnish_sauna