Danger Lies at Both Ends of Sleep: Too Little and Too Much

How much sleep should a healthy person get?  Most experts put the amount at seven to eight hours a night. And when reseachers at the University of Warwick and University College London
examined sleep patterns and death rates over two decades among 10,308
civil servants, they went with the seven hour ideal. BBC reports that the scientists found that people who cut their sleeping from seven to five hours a night
had twice the risk of a fatal cardiovascular problem of those who stuck
to the recommended seven hours a night. The same researchers were more surprised to learn that those who increased their sleep to eight hours or more a night
were more than twice as likely to die during the period of the study as
those who had not changed their habit.
Read more from the BBC.