PEOPLE WHO SLEEP LONGER
AT RISK OF HEART DISEASE
People who slept longer than eight hours had a higher risk of dying or developing diseases of the heart or blood vessels in the brain compared to those who slept for between six and eight hours.
Recent research examined data on 116,000 people aged between 35 and 70 from 21 different countries.
After an average follow-up period of nearly eight years, researchers recorded 4,381 deaths and 4,365 “major cardiovascular events.” Compared to people who slept six to eight hours, those who slept a total of eight to nine hours a day had a 5 per cent increased risk.
Those sleeping between nine and 10 hours a day had an increased risk of 17 per cent — and those sleeping more than 10 hours a day carried a 41 per cent increased risk of cardiovascular disease or death. The researchers also found a 9 per cent increased risk for people who slept a total of six or fewer hours. Lead author Chuangshi
Wang, a PHD student at Mcmaster and Peking Union Medical College, said: “Our study shows that the optimal duration of estimated sleep is six to eight hours per day for adults.”