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為什么過度勞累時(shí)難以入睡？（通訊員稿）
Why is it so difficult to fall asleep when you are overtired?
[ 2006-11-08 10:54 ]
特別累的時(shí)候都想好好休息一番，可有時(shí)卻怎么也睡不著，這讓人非常痛苦。怎樣才能解決這個(gè)讓人頭痛的問題呢？看看下面這篇文章的說法吧！
 Why is it so difficult to fall asleep when you are overtired? There is no one answer that applies to every individual. But many people fail to note the distinction between fatigue -- physical tiredness -- and sleepiness, the inability to stay awake. It's possible to feel "tired" physically and still be unable to fall asleep, because while your body may be exhausted, you don't feel sleepy. To fall asleep, you need adequate time to unwind, even if you feel fatigued. It's not so easy to simply "turn off."
Lack of sleep complicates matters even more. Experts say adults need at least 7 to 8 hours of sleep a night to function properly. When you get less sleep than that on consecutive nights, you begin toaccrue"sleep debt." As sleep debt increases (and functionality decreases), your body experiences a stress response and begins to releaseadrenaline. Now avicious cyclehas been created: You experience the feeling of being more and more tired, but your body is increasingly stimulated. "Power sleeping" for more hours on weekends is only a temporary solution. There is no substitute for getting a good night's sleep on a regular basis.
unwind: 放松
accrue: 產(chǎn)生
adrenaline: 腎上腺素
vicious cycle: 惡性循環(huán)
power sleeping: 補(bǔ)覺
（改編自：外語教育網(wǎng) 北京林業(yè)大學(xué)通訊員刑元媛供稿 英語點(diǎn)津 Annabel編輯）
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