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This is the Goldilocks principle: not too much, not too little.
Not getting enough sleep can lead to health problems – this has been studied many times. But a new seven-year study conducted by the University of Colorado at Boulder with nearly half a million people has shown that having too much sleep can increase your risk of heart attack.
The research, which was
published Monday in the journal of the American College of Cardiology
, found that the healthiest time that a person can sleep is between six and nine o'clock.
Celine Vetter, Senior Author and Assistant Professor of Integrative Physiology at CU Boulder, and co-authors at Massachusetts General Hospital and the University of Manchester, analyzed genetic information, self-reported sleep patterns, and medical records. 461,000 British. Biobank participants aged 40 to 69 who had never had a heart attack. The study followed the participants for seven years.
According to the researchers, participants who slept less than six hours were 20% more likely to have a heart attack during the study period. Those who slept more than nine hours were 34% more likely. The greater the number of people who fell outside the 6 to 9 hour window, the more likely they were to have a heart attack.
When the researchers looked at participants with a genetic predisposition to heart disease, they found that those who slept between six and nine hours reduced their risk of heart attack by 18%.
"This provides the strongest evidence to date that sleep duration is a determining factor for heart health, and that's for everyone," said Vetter.
Research has long pointed to an association between sleep and heart health, but with countless other factors, researchers have not been able to determine whether poor sleep causes heart problems or Conversely. In this new study, researchers combined observational and genetic research to ask questions in a new way and incorporate 30 other factors, including body composition and physical activity.
They then discovered that sleep duration influenced the risk of heart attack independently of other factors.
Lead author Iyas Daghlas, a medical student at Harvard University, said he hoped this message could bring hope to the public.
"Regardless of your inherited risk of heart attack, getting enough sleep can reduce that risk, just like eating healthy, not smoking and adopting another lifestyle, perhaps," he said.
Read the full study here in the Journal of the American College of Cardiology online here
.
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