This is the myth that just won’t go away.
Former British Prime Minister Margaret Thatcher famously had a brief four hours a night. German Chancellor Angela Merkel has made similar claims, and swapping hours in bed for extra time in the office is not uncommon in tales of business or entrepreneurial success.
Yet the researchers said the belief that less than five hours’ shut-eye was healthy, was one of the most damaging myths to health.
“We have extensive evidence to show sleeping five hours or less consistently, increases your risk greatly for adverse health consequences,” said researcher Dr Rebecca Robbins.
These included cardiovascular diseases, such as heart attacks and strokes, and shorter life expectancy.
Instead, she recommends everyone should aim for a consistent seven to eight hours of sleep a night.