A new study suggests that men in middle age who sleep five hours or less each night have twice the risk of developing a major cardiovascular event in the two decades following compared to men who sleep seven to eight hours a night.
“For people with busy lives, sleeping may feel like a waste of time but our study suggests that short sleep could be linked with future cardiovascular disease,” said study author Moa Bengtsson, of the University of Gothenburg, Sweden.
Previous data provide conflicting evidence as to whether short sleep is connected to a great chance of a future cardiovascular event. The new study appears to solidify the connection.
Not only that, the new data suggests that men who sleep five or fewer hours per night are more likely to have diabetes, obesity, low physical activity, high blood pressure, and poor sleep quality compared to those who get seven to eight hours per night.
“Men with the shortest sleep duration at the age of 50 were twice as likely to have had a cardiovascular event by age 71 than those who slept a normal amount, even when other risk factors were taken into account,” Bengtsson said.
“In our study, the magnitude of increased cardiovascular risk associated with insufficient sleep is similar to that of smoking or having diabetes at age 50,” she added. “This was an observational study so based on our findings we cannot conclude that short sleep causes cardiovascular disease, or say definitively that sleeping more will reduce risk. However, the findings do suggest that sleep is important—and that should be a wake-up call to all of us.”