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詼諧的語言，生動的內(nèi)容一分鐘快速掌握科技最新動態(tài)

本期節(jié)目音頻下載

Mice Exposed to Night Light Get Heavy

You’ve tried everything to lose weight: portion control, fasting, liquid diets, even eating meals on a treadmill. Now, a new study suggests that maybe you should try turning out the lights. Because, at least in mice, exposure to light at night leads to weight gain. The work appears in the Proceedings of the National Academy of Sciences. [Laura Fonken et al., "Light at Night Increases Body Mass by Shifting the Time of Food Intake"]

為了減肥，人們真是用盡千方百計：控制攝入量、禁食、食用流質(zhì)食物，更有甚者邊在跑步機上運動邊吃飯……不過，日前一項新研究表明，也許你可以試著把燈關了以助你減肥。至少老鼠在晚上要是暴露在燈光底下活動的話體重會增加。該研究報告發(fā)表在《美國國家科學院院刊》上。

Obesity is an epidemic. Maybe it’s because we eat too much and spend too much time in our seats. But another factor could be that these days we’re never really in the dark. Streetlamps and indoor light sources now brighten our nights. And that light pollution could be messing with our circadian rhythms, which control not only sleep, but metabolism. In fact, mutant mice that have no circadian clocks tend to be chunky.

肥胖現(xiàn)象相當普遍，有可能是因為人們吃得太多，又常坐在椅子上不起來活動，但還有可能是因為人們很少真正置身漆黑的夜晚。其實街燈、室內(nèi)燈在為人們照亮黑夜的同時，也會導致人們生理節(jié)奏紊亂。而生理節(jié)奏不僅控制著人們的睡眠，還控制著人們的新陳代謝。比如無生物鐘的變種小鼠身形就趨于矮胖。

To test the connection between photons and fat, scientists took mice and lit up their cages. And they found that mice that were exposed to even dim light at night were chubbier than mice who spent their evenings in the dark. Though they all ate the same amount, the fat mice snacked more when they were less active, perhaps failing to burn off those calories.

為證明光和脂肪之間的聯(lián)系，科學家在小鼠身上做了個實驗。他們將小鼠的籠子照亮，經(jīng)觀察后發(fā)現(xiàn)，即使是暴露在昏暗燈光下的小鼠也要比在黑暗中活動的小鼠身形圓潤。雖然它們的進食量總量相等，但肥鼠懶起來的時候吃的就多了，可能就沒辦法燃燒這些熱量了。

So maybe skip the night light. Especially the one that lights up when you open up the fridge.

所以晚上還是把燈關掉吧，最好是把冰箱燈給卸了，省得你在夜里偷吃O(∩_∩)O哈哈~

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