Althoughthe shearstrengthoffrozenclayisonlyincreasingwith the temperaturedecreasing, there is a tendency that the angleof internal friction is dropping with the loweringoftemperature.
If you're planning on taking a polar bear plunge, Tipton says you can prime your body for the event several days before by gradually lowering the temperatureof your shower.
"We aren't sure why activity primes your body for sleep so well, but it's likely a combination of factors, including lowering your core body temperature, increasing the sleep-promoting hormone melatonin and supporting a biological need to restore energy levels and repair cells and tissues when you sleep, " Cardinal says.