这能持续多长时间?大约需20分钟咖啡才能到达小肠,然后进入血液,最后作用于大脑。
So if you can time your nap to be just 20 minutes from the moment you've had your coffee, you should wake up feeling pretty great.
所以如果你能把午睡时间设定在喝完咖啡后的20分钟内,醒来之后你会感觉很好。
How does this work? The reason you were feeling crappy in the first place is a molecule called adenosine in your brain that's responsible for making you feel tired.
这是怎么做到的呢?你觉得糟糕的主要原因是你大脑中有一种腺苷分子,它会让你感到疲劳。
We produce different amounts of adenosine throughout the day - it's a by-product of brain activity, so at the end of the workday you're likely to experience a build-up of adenosine, which slows down your neurons and makes you feel tired.
我们在一天中会产生不同数量的腺苷,这是大脑活动的副产物,所以结束了一天的工作后,积累的腺苷会减缓你的神经元活动,使你感到疲劳。
What caffeine does is block off the adenosine from binding with receptors in the brain. And this is where a nap can really help. "The great thing about coffee naps is that sleep naturally clears out adenosine from the brain. So the caffeine doesn't even need to compete with the adenosine to fit into those receptors," says the Vox video team.
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