The Science Behind Sleeping With Socks On
Millions of people around the world go to bed wearing socks. But are you curious about the science behind this practice and whether it is good for our sleep？
To understand why, you first need to grasp the relationship between core body temperature and sleep. During daylight hours, the human body hums along at an average temperature of 37 degrees Celsius. But at night, your core body temperature dips as much as 1.2 degrees Celsius over the course of six or seven hours of sleep. This gradual decrease in core body temperature, it turns out, is a key part of the complicated neurobiological dance of falling asleep and staying asleep. And the faster you can lower the core body temperature, the faster you will fall asleep.
One of the ways that your body regulates its temperature is through blood vessels in your skin. If the brain decides the body is too hot, it will widen blood vessels, redistributing warmer blood from the body's core through the rest of the body to cool it down. If the body is too cold, the brain signals the opposite reaction, restricting the flow of blood to the surface.
The palms of your hands and soles of your feet are the body's most efficient heat exchangers, since they are hairless and less insulated than other skin surfaces. Researchers have shown that warming the feet before going to sleep using a warm foot bath or by wearing socks promotes vasodilation, which in turn lowers the body's core temperature faster than going to sleep with cold, bare feet. This can be especially critical during chilly weather when the feet can get so cold that tossing and turning throughout the night becomes inevitable.
In addition to that, wearing socks can enhance our blood circulation. From heart failure to strokes and other life-threatening medical conditions, the lack of proper blood circulation can be detrimental to your health in diverse ways. The good news is that sleeping in socks can ramp up the supply of blood, oxygen, and nutrients to every part of the body, thus which keep the heart, liver, kidneys, and other important organs working at optimum levels.
1. hum v. 活跃，繁忙
2. dip n. (暂时的) 下降
3. neurobiological adj. 神经生物学的
4. sole n. 脚掌
5. insulated adj. 有隔热（或隔音、绝缘）保护的
6. vasodilation n. 血管舒张
7. tossing and turning 辗转反侧；翻来覆去难以入睡
8. detrimental adj. 有害的，不利的
9. ramp up 增加; 使增加