Kate McCarthy swears by sleeping in socks-doesn’t matter the style or pair. She resisted buying into the Bombas trend for quite a while, but now she's officially sold on the popular brand. Sarah Hagman says her choice of whether to sock or not depends on the night. He opts for a pair of Smartwool Crew socks, some of which are made from merino wool. In a short time, he saw a “notable difference” in his sleep based on sleep tracker data. Sunil Doshi recently started wearing socks to bed, as he heard it could help reduce core temperature. In the healthy population, a nighttime change in circadian rhythm causes “ distal vasodilation,” meaning the blood vessels in the feet and hands expand, allowing heat to circulate away from your core and dropping your core body temperature. It tells us when it’s time to wind down for sleep, or wake up for the day. Our bodies run on a 24-hour clock that largely corresponds to sunlight. “Indeed, cold feet and the inability to vasodilate may be a physiological cause of some sleep disturbances, particularly in the elderly,” the authors state. “Whether the cold cold feet are uncomfortable and that keeps you awake, or whether as the body goes into sleep that the blood flow improves, feet get perfused better because it's part of the resting phenomena.” Either way: Feet that are too cold could keep you awake, and research has shown it.Īccording to one research study, cold extremities may correspond to poor vasodilation, or the widening of blood vessels, which typically happens as body temperature drops in the evening. ![]() “It's not clear if it's chicken or egg,” Malhotra says. It’s difficult to pinpoint why cold feet cause sleep disturbances and increase sleep latency (or the time it takes you to doze off).
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