A group of Norwegian researchers asked over 52,000 men and women to fill out health questionnaires and after receiving the results, they followed the subjects for over eleven years. Researchers then compared the subjects with people who never had sleep problems. Subjects who had trouble falling asleep had an increased 45% risk of heart attack. People with problems staying asleep had a 30% increased risk, and finally, those who woke up tired had a 27% increase in risk.
– Winnie Zhang