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  Too much sleep is 'bad for you'
Updated 15 February 2002, 14.45
Person asleep under duvet
Do you hate getting up for school and love lying in at the weekends?

Is your dream sleep an epic 12-hour kip?

Well scientists now reckon that sleeping too much is bad for your health.

Click here to try our sleepy quiz!

Penelope Cruz
Sleepy: Penelope Cruz
According to them, about six-and-a-half hours sleep is OK, but people who regularly have more than eight hours a day could be doing themselves harm.

But too little isn't good for you either.

15 hours a night

Former Prime Minister Margaret Thatcher famously survived on four hours a night, but sleep experts say that's not enough for most people.

But Vanilla Sky actress Penelope Cruz says her beauty secret is that she gets up to 15 hours a night.

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