Artificial heat such as a shower or tea affects diurnal rhythms in humans
the verdict
INSUFFICIENT LEANING
refutedsupported
the weight of evidence
3 sources for · 0 against
AS REPORTEDno primary record reached; this is what the reporting says
The retrieved literature indicates that passive body heating via warm showers or hot beverage consumption produces acute physiological responses and affects sleep-related measures, but it does not fully establish broader impacts on diurnal rhythms.
Before-bedtime passive body heating by warm shower or bath to improve sleep: A systematic review and meta-analysis - ScienceDirect
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## Sleep Medicine Reviews
Volume 46, August 2019, Pages 124-135
# CLINICAL REVIEWBefore-bedtime passive body heating by warm shower or bath to improve sleep: A systematic review and meta-analysis
Shahab Haghayegh a, Sepideh Khoshnevis a, Michael H. Smolensky a b, Kenneth R. Diller a, Richard J. Castriotta b c
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## Introduction
Bathing has long been linked not only with cleanliness and spiritual and religious purification [1] but health preservation and rehabilitation [2]. During the Homeric era of 1200 to 800 BC bathing was viewed exclusively as hygienic [2]; however, Hippocrates (460–370 BC) regarded it as health promoting and therapeutic. The Romans also considered it to be curative, in addition to relaxing and pleasurable [2]. During the 16th century, bathing, especially in spring waters, was pursued for healing, and commencing
Effects of bathing-induced changes in body temperature on sleep | Journal of Physiological Anthropology | Springer Nature Link
# Effects of bathing-induced changes in body temperature on sleep
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- Published: 08 September 2023
- Volume 42, article number 20 (2023)
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Journal of Physiological Anthropology
## Abstract
### Background
Passive body heating before sleep is well known to lead to improved sleep. However, the effects of the degree of change in body temperature by bathing on sleep quality are unclear. The present study aimed to clarify the effects on sleep of bathing-induced changes in body temperature.
### Methods
Twenty-three healthy males and females in their 20 s to 50 s bathed in their homes 1.5–2 h before bedtime under three bathing conditions: showering only; short bathing in a bathtub; and long bathing in a bathtub. Sublingual and skin temperatures and thermal sensation before and after bathing, sleep indices such as sleep onset latency, time in bed, sleep efficiency, and wake after sleep onset, all of which were evaluated using an actimeter, and subjective evalu
Effects of hot tea, coffee and water ingestion on physiological responses and mood: the role of caffeine, water and beverage type
## Abstract
Psychopharmacological studies using caffeinated beverages or caffeine have rarely considered temporal effects on psychological and physiological function or the specific contribution of caffeine, hot water, or beverage type to the observed effects. The effect of 400 ml hot tea, coffee, and water consumption on systolic and diastolic blood pressure (SBP and DBP), heart rate, skin conductance (a measure of sympathetic nervous system activation), skin temperature, salivary cortisol, and mood were monitored in 16 healthy caffeine-withdrawn (14 h) subjects in a complete crossover design. Beverages were ingested with/without 100 mg caffeine and milk (tea/coffee only). Hot beverage ingestion rapidly increased skin conductance and temperature (+1.7 degrees C) with peak effects observed only 10-30 min post-consumption. Caffeine in the beverage rapidly augmented skin conductance responses but, in contrast to the effect of hot water, reduced the skin temperature response and increased SBP (+2.8 mmHg) and DBP (+2.1 mmHg) 30-60 min post-consumption. Bot
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