Now I'm wondering about saunas. there was a paper (can't find it) saying finnish males using a sauna 4-7 times a week for 19 minutes at 174 degrees had a 66% l

Now I'm wondering about saunas. there was a paper (can't find it) saying finnish males using a sauna 4-7 times a week for 19 minutes at 174 degrees had a 66% less chance of all cause mortality. Wonder if it just works out to be an extra year of life?