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    Why Lack of Sleep Could Be Making You Fatter

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    簡介:徹夜不眠會毀了你第二天的心情,有伴侶的朋友們都希望在GREnjieyingyuzhufu/ target=_blank class=infotextkey>情人節當天以最佳狀態面對心愛的人,或者陪他(她)外出觀光游玩,那么前一天睡個好覺是不可或缺的任務。但缺覺還有一個不為人知的重大危害,就是會讓人發胖,我們一起來看看原因為何。

    Sleepless nights don’t just ruin your mood the next day—they could also damage your waistline. According to new research in the August issue of the American Journal of Clinical Nutrition, sleep deprivation can cause people to pack on extra pounds.

    Researchers at the New York Obesity Nutrition Research Center at St. Luke’s-Roosevelt Hospital found that sleep-deprived people seem to burn the same number of calories as the well-rested, but they consume about 300 more calories a day. Given that it takes just 3,500 calories to add a pound to your body, those calories can quickly turn into extra weight.

    But there are several other reasons that sleep loss could lead to weight gain, says sleep disorder specialist Michael Breus. When we get too little shut-eye, our metabolism slows down to conserve energy. That slowdown triggers the release of the hormone cortisol, which increases appetite. Your body thinks it needs more energy, so it asks for more food.

    In a vicious cycle, sleep loss also causes our bodies to release more ghrelin, another hormone that signals hunger, and less leptin, the hormone that tells your stomach that it’s full. With your hormones off-kilter, your body wants more food and lacks the sensitivity to know when to stop eating. Not to mention that being awake more hours gives you more time to snack.

    “The later you’re up at night, the GREater the likelihood that you’re going to eat,” Breus says. And “you’re more likely to eat high-fat, high-carb foods.”

    One other contributing factor to such weight gain is that the body burns the most calories during REM sleep, a deeply restful phase. And less sleep means less time in REM.

    For optimal health, experts say you should try to get 7.5 hours of sleep a night. If you have trouble sleeping, stick to a nightly routine, exercise during the day, banish worries to a journal, and keep pre-bedtime activities relaxing.

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