goal is relaxation and preparing for sleep, the evidence is stronger for warm water.
Research on passive body heating suggests that warm showers or baths before bedtime can support the body’s temperature changes associated with sleep.
That doesn’t mean hotter is better.
Extremely hot water can be uncomfortable and may irritate or dry the skin.
A comfortably warm
shower is enough.
What About Cold Showers?
Cold showers have become popular online, and some people find them refreshing.
But if your primary goal is preparing for sleep, current research
