Taking a hot bath at least 90 minutes before bedtime is your ticket to sound sleep. Just remember that the water temperature should be around 40-42ºC, else you may not get better shuteye.
Biomedical engineers at University of Texas-Austin reached this conclusion after analyzing thousands of studies linking water-based passive body heating, or bathing and showering with warm/hot water, with improved sleep quality.
"When we looked through all known studies, we noticed significant disparities in terms of the approaches and findings," said Shahab Haghayegh, lead author on the paper.
"The only way to make an accurate determination of whether sleep can, in fact, be improved was to combine all the past data and look at it through a new lens."
In collaboration with the UT Health Science Center at Houston and the University of Southern California, the researchers reviewed 5 322 studies.