Sleeping with socks on in a cool room promotes faster sleep onset by passively warming the feet, which signals to the body that it is time to sleep.

noli's read

The idea that warming one's feet in a cool environment helps with falling asleep is based on a well-established principle of thermal regulation. Indeed, an experimental study conducted by Seoul National University (Ko & Lee, 2018) showed that wearing bed socks allowed participants to fall asleep approximately 7.5 minutes faster and increased total sleep time by 32 minutes. In terms of circadian biology, research published in the scientific journal Nature by researcher Kurt Kräuchi confirms that warming the extremities dilates the blood vessels in the feet. This phenomenon allows for the release of internal heat and lowers the core body temperature, thereby sending a natural sleep signal to the brain. It is therefore a gentle and validated method of thermal optimization, particularly effective for individuals who tend to have cold feet before going to bed. Shelby's advice is based on solid scientific foundations and is presented quite accurately.

the sources

1. 1Lan L, Tsuzuki K, Liu YF, Lian ZW. 2017
2. 2Brown TM et al. 2022