SleepShred
The temperature dependence of sleep
Harding EC, Franks NP, Wisden W · Frontiers in Neuroscience 13:336 · 2019
Key finding
Falling core temperature (via warm skin, cool room) is a trigger for sleep onset.
Citation
Related guides
Related studies
Effects of thermal environment on sleep and circadian rhythmHeat exposure increases wakefulness and reduces deep and REM sleep; humidity worsens it.Nighttime ambient temperature and sleep in community-dwelling older adultsSleep efficiency was best between ~20–25 °C (68–77 °F) in older adults and dropped 5–10% as rooms warmed — cooler is better, personal range matters.
Track it, don't guess it
SleepShred turns this research into a 20-second daily habit: log your night, see which of your own behaviours move your sleep, and screen for the disorders nobody diagnoses.
Get SleepShred for iPhoneEducational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.