Sleeping too much may have negative effects on a person's health, just like with getting too few hours of sleep, according to new research that was published in the Journal of the American Heart Association.

Various research have shown the effects of sleep deprivation, but the number of studies into why oversleeping is bad has been comparatively fewer. With all of them taken into account, how many hours of sleep should a person get every night?

Too Much Sleep May Lead To Early Death

The new research studied the relationship of sleep duration and quality with mortality and cardiovascular harm, based on 74 studies that involved 3.3 million participants. It revealed that sleeping too long may be bad for people and may also be a sign of other health problems.

According to the study, people who slept for 10 hours every night carried a 30 percent higher risk for premature death compared to people who only slept for 8 hours. The risk of death due to stroke and cardiovascular disease also increased, up by 56 percent and 49 percent, respectively.

Dr. Tara Narula, medical contributor for CBS News, said that the study may be showing that people who are sleeping longer have underlying medical conditions, such as weaker immune systems and adverse behavior when it comes to their health.

Narula added that people should strive for consistent and regular sleeping patterns following a regimen every night to keep the body accustomed to a set amount of sleep.

How Many Hours Of Sleep Should You Get?

The study suggests that people should not be getting more than 9 hours of sleep each night, as each hour beyond that places them in the danger zone. The research actually coincides with a study carried out by scientists from the Seoul National University College of Medicine, which found that sleeping for more than 10 hours could lead to the development of heart disease.

On the other end of the spectrum, sleep deprivation also has several negative effects on a person's health. People are recommended to get at least 7 hours of sleep each night to avoid diseases such as cancer, diabetes, Alzheimer's disease, and more.

Dr. Daniel Gartenberg, however, further narrows the window by saying that people need to get at least 8.5 hours of sleep every night because the modern world is bombarding them with information.

As such, it appears that the sweet spot for sleep is between 8.5 hours to 9 hours, which is ideally what people should be getting every night.