Before the clocks change: the 90-minute warm water rule
Daylight saving starts on Sunday. Warm water timed well before bed is one of the best-supported sleep habits there is.
The Research
Read the studies, not the hype.
Every piece here starts with a paper, names it, and says what it does and does not show. Written for people over forty who want the evidence before the equipment.
Women, sauna and sleep
Most sauna data comes from Finnish men. A 2026 Swedish study looked at what women and men report after bathing.