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A study found that people who sleep less tend to be fat, and experts said it’s time find if more sleep will fight obesity.

　　“We’ve put so much emphasis on diet and exercise that we’ve failed to recognize the value of good sleep,” said Fred Turek, a physician at North-western University.

　　本周一來自諾福克的西弗吉尼亞醫學院的一份對1000人做的研究表明，累計睡眠時間和體重指數剛好成反比，體重指數是一種以身高為基準來衡量體重的方法。

　　Men slept an average of 27 minutes less than women and overweight and obese patients slept less than patients with normal weights, it said. In general the fatter subjects slept about 1.8 hours a week less than those with normal weight.

　　“Americans experience insufficient sleep and corpulent bodies. Clinicians are aware of the burden of obesity on patients,” the study said.

　　“我們的研究結果表明大量地增加睡眠時間是沒有必要的，每晚多睡20分鐘對降低體重指數似乎有一定的幫助。”該研究補充道。

　　“我們警告說，該研究并沒有表明睡眠時間長短與肥胖之間有什么必然的因果關系。不過，調查顯示延長睡眠時間確實可以有效減輕體重，這對于證明這一關系非常有幫助。”

　　The study was published in the Archives of Internal Medicine along with an editorial by Turek and Northwestern colleague Joseph Bass commenting on it and related research.

　　In an interview with Reuters, Turek said some studies have shown sleep deprivation causes declines in an appetite suppressing protein hormone called leptin, and increases in another hormone that causes a craving for food. In addition neuropeptides in the brain governing sleep and obesity appear to overlap, he said.

　　該研究還提到，近年來發達國家肥胖癥狀以驚人的速度增長，在美國肥胖已成為一種普遍現象，并且引發了多種健康問題。