Record 004 · Heat · 1952
50%52.04.H
Sauna Heat Exposure
Finnish practice
“The session File 004 names on sauna objects: timed heat exposure, not a steam room selfie.”
Helsinki 1952 and postwar physiology made 'a sauna session' a measurable bout — temperature, duration, rounds — that later cohort studies could count.
Named the heat bout the hardware was built to deliver.
- Timed heat bouts
- Repeatable rounds
- Population-scale sauna use
Sit in the heat. Come out different.
