One study which analyzed the data of at least 130,000 men and women aged 40 to 69 years old found out that sleeping less than 6 hours per night could be linked to metabolic syndrome. Interestingly, the researchers also found the link to oversleeping (10 hours or more).
Metabolic Syndrome is a group of risk factors or conditions that could heighten the risk of developing heart diseases and other health problems such as diabetes and stroke.
Remarkably, some studies found links between oversleeping and diabetes as well as stroke.
How to too much sleep affects the body can manifest in a higher risk for certain conditions, such as an increased risk of diabetes.
In one study involving 9,000 Americans, researchers found out that the participants who slept for more than 9 hours had 50% more risk of developing diabetes than those who had 7 hours of sleep each night.
The scientist still couldn’t find a solid connection between oversleeping and diabetes, but they suspect something. It’s possible that oversleeping is “indicative” of another health condition that makes people more at risk of diabetes.
Another thing that should be noted is that the increased risk could also be found in people who sleep for less than 5 hours a night.
Heart Diseases and Stroke
When it comes to how too much sleep affects the body, stroke is another concern.
In one study featured in the journal of American Heart Foundation (AHA), researchers found out that people who sleep for more than 10 hours each night are 56% more at risk of dying because of stroke.
Additionally, participants who overslept are 4% more at risk of dying due to cardiovascular diseases.
This study by the AHA reviewed 74 studies with more than 3 million participants.
Once again, the solid connection between oversleeping and stroke and heart diseases has not been established yet.