Why less than 7 hours' sleep can shorten your life

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So you think you get enough sleep, do you? Think you can exist on six, maybe seven hours a night? If, when your alarm goes off in the morning, you feel as though you could keep snoozing, then you’re likely not getting enough good quality sleep at night. If you can’t function without coffee before noon, you’re probably sleep-deprived. And if you’re sleep-deprived, you’re not alone: according to the World Health Organization, we are in the midst of a global sleep-deprivation epidemic.

Not getting enough shut-eye won’t just make you yawn on the Tube or wish for nap-time at your desk. According to one of the world’s leading sleep scientists, the less you sleep, the shorter your life will be. Matthew Walker is a professor of neuroscience and psychology at the University of California and he’s just published the definitive manifesto on sleep science, called Why We Sleep – out this week.

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