I love sauna, been using it for decades. It does several things for me, though this may not apply to everyone:
- the heat relaxes my muscles after a workout, reducing stiffness
- my body maintains a better tolerance to heat that helps here in Florida
- I sweat more freely, another advantage in a hot climate
- it helps my cardiovascular system
- when I lived in a cold climate a heat soak was most effective for quickly ridding myself of a deep chill
- I get fewer & briefer head colds, studies confirming that the rhino virus (in the nose) can be killed by breathing air at sauna temps
When I was younger I also got a bit of a thrill sitting totally naked in a men's sauna with other guys. Nowadays I hardly think about the nudity, perhaps a combination of familiarity and declining hormones due to old age.
But I still prefer nudity and will avoid saunas that require clothing, since they interfere with blood circulation to the skin, along with complicating my personal routine of taking several cold showers during the sauna session, and causing me to deal with soaking wet clothing afterwards. Plus in my case the latex in stretch waistbands of gym shorts or swimwear will cause a slight allergic skin rash in the heat, which ordinarily doesn't bother me as much at lower temps.