Updated 04 October 2002, 10.55

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And they do particularly badly at important subjects like maths and English.

			Fact File
	Snoring study
		The study looked at 1,100 kids
		114 of these were snorers
		Heavy snorers regularly got Ds in Maths and English
		But only 16 % of kids who never snored got Ds!

This is because snoring means you actually breathe in less oxygen while you're asleep, so you don't get such a good night's sleep and your body doesn't recover properly from the day.

So children find it harder to concentrate at school the next day.

Scientists think this is such a big deal, they're telling parents to watch their kids sleeping, to see if they snore.

And if they do, they should get medical help. Snoring can be caused by about 50 different conditions, but most of them can be easily treated.

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