Winston Churchill and Margaret Thatcher swore by them for much needed energy. But it seems power naps might be bad for us. Those who steal forty winks in the day are more likely to suffer from high blood pressure, according to research.

The Mayo Clinic in Minnesota pooled data from nine studies with 112,267 participants. They found those who took a snooze in the middle of the day were between 13 and 19 per cent more likely to have hypertension.

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Source: http://www.dailymail.co.uk/