[ekropotin]

Cold showers - good for immune system. Heat expose - good as well. I guess what doesn’t kills us - makes us stronger is true after all.

[LorenPechtel]

Cryotherapy, also.

I'm wondering if what's actually going on is the temperature swings are what's important, not how they come about.

I have also seen both scuba diving and skydiving suggested as beneficial due to the oxygen changes.

Could this perhaps be a form of exercise for the body's regulatory systems?