According to research supported by the American Heart Association, warming the feet can help the body lower its core temperature more efficiently at bedtime. Falling asleep requires a slight drop in internal temperature. When your feet are warm, blood vessels expand in a process called vasodilation, allowing heat to move away from the body’s core. This signals to the brain that it is time to sleep.
A 2023 study published in Sleep Medicine found that people who wore socks to bed fell into deep sleep up to 20 percent faster than those who slept barefoot. Entering deep sleep sooner may improve overall sleep quality and help the body recover more effectively overnight.
