People who sometimes sleep a lot and when a little and those who fall asleep at very different times, face a greater cardiovascular risk. The more irregular the duration of their sleep, the greater the risk of developing cardiovascular disease due to a biological clock disturbance affecting metabolism, blood pressure and heart rate, according to a new US scientific study.
Investigators, led by Assistant Professor of Sleep Epidemiology Tianyi Huang of Harvard University School of Medicine and Brigham Hospital & Boston Women’s, which made the relevant publication in the journal of the American College of Cardiology, studied in depth of almost five years 2.000 people 45 to 84 years. Participants did not have cardiovascular disease at the beginning of the study and were asked to wear a special sleep recorder on their wrist. During the research 111 people suffered a heart attack, stroke or other cardiovascular event.
It was found that those who had the most irregular sleep (deviation of at least two hours during sleep each night), were more than twice as likely to have a cardiovascular problem. Those who had the most normal sleep schedule (deviation of up to one hour from night to night), were less at risk. The same risk difference existed with regard to the deviation of the time one fell into bed to sleep: those who differed by at least 90 minutes from night to night, were more at risk than those who differed the most against 30 minutes.
"Usually when we talk about sleep, we tend to focus on its duration, how many hours you sleep at night and not how irregular your sleep is, how many erratic hours he falls into bed and how much the duration of his sleep differs from one night to the next. Our study shows that healthy sleep is not just about getting enough sleep, but also the one who is not irregular ", said Dr. Huang.
Another American research, led by Dr. Nur Macarem of Columbia University College of Medicine, New York, which was done in 1.920 middle-aged people 69 years, confirms that if all three are combined - adequate sleep, quality sleep and at regular intervals- then the risk of heart attack is reduced, stroke and other cardiovascular problems.
Alongside, this helps, especially women, in maintaining a normal weight. Those who fall asleep at the same time every night, lose weight more easily.
The indications that the little one is constantly increasing, Poor and irregular sleep increases the risk of heart disease, hypertension, diabetes, obesity etc.. In fact, many scientists argue that sleep should now be considered the eighth indicator of cardiovascular health., along with smoking, body weight, the diet, physical exercise, cholesterol, blood pressure and sugar level.
The second study found that people with healthier sleep duration (seven to eight hours each night) is 61% less likely to be diagnosed with a heart problem. Those who get quality and not irregular sleep, they have 59% lower risk of heart attack or stroke and 44% less likely to develop heart disease within the next five years.
End, a third American study, headed by Dr.. Maurice Ohio, Stanford University, California, which took place in almost 11.000 and was presented at a conference of the American Academy of Neurology in Toronto, concluded that the elderly who show drowsiness during the day, may be more at risk of developing new diseases, such as diabetes, hypertension or cancer. This is especially true for seniors who are drowsy during the day, although they have slept at least seven hours a night.
"Focusing on the drowsiness of the elderly can help doctors predict and prevent future medical conditions", said Macarem. For example, according to the study, the elderly with frequent drowsiness, they had 2,3 times more likely to develop diabetes or hypertension, 2,5 times the risk of heart disease and twice the risk of cancer after three years.