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How much sleep do we really need ?

We have talked about Sleep Debt and Modafinil pills can help you stay awake for several days in a row.

But how many hours of sleep is sufficient for us ? Although many factors influence how much sleep we really need, the common recommendation has been eight hours a night. But now a contrasting opinion has emerged on the internet.

Neil Stanley, sleep research expert, believes that everyone has their own individual "sleep need" which can be anywhere between three and 11 hours. "If you’re a three-hour-a-night person, you need three; if you're 11, you need 11."

Stanley has a simple solution to find out the amount of sleep that you require. Simply sleep until you wake naturally, without the aid of an alarm clock. Feel rested? That’s your sleep need.

Related: How Dreams Work ? Can we control them ?