Survey shows women need 8 hours of sleep

　　Researchers who looked at 71,000 women over a 10-year period found that those who slept five hours or less a night had a 45 percent greater risk of coronary artery narrowing than those who got eight hours of sleep a night.

　　Excluding factors such as smoking and weight, compared with eight hours of sleep, women who slept an average of six hours a night had an 18% higher risk of heart disease, and women who slept an average of seven hours had a 9% higher risk of the disease.

　　However, Brigham Obstetrics and Gynecology in Boston, USA Hospital What surprised the researchers was that women who slept an average of 9 to 11 hours a night also had a 38% higher risk, the researchers said in an article published in the Journal of Internal Medicine.

　　Previous research has found that short-term sleep deprivation has a negative impact on healthy effects, including increased blood pressure, irregular heartbeat, Grape Decreased sugar tolerance and increased hydrocortisone levels. But researchers note that little is known about the impact of chronic sleep deprivation and oversleeping on health issues such as heart attack and coronary heart disease. The researchers said: "This finding sends an important message to workaholics who like to watch TV and surf the Internet late into the night, saying that getting enough sleep every day is not only lucky, but also an important part of a healthy lifestyle. ”