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Too Little and Too Much Sleep Bad For Health

By jeremyc | August 6, 2018

Sleeping more than recommended 7-8 hours at night increases your risk of developing cardiovascular disease, as does sleeping for fewer hours than recommended. However, sleeping more is linked with greater risk to cardiovascular disease than sleeping less. In other words, excess sleep is more harmful to health than insufficient sleep.

These were the findings of a new study.

While other studies, too, have investigated the link between sleep duration and cardiovascular risk, this is the first study to evaluate how every hour increment or decrement in sleep affects health. It is also the first one to investigate the effect of sleep quality on cardiovascular risk.

In this study, the researchers found that more you sleep over 7-8 hours, greater the negative impact on health. For instance, people who sleep for 9 hours were found to have 14 percent greater mortality risk. On the other hand, this risk rose 30 percent when sleep duration was 10 hours.

The researchers also noted that poor-quality sleep was associated with 44 percent greater risk of developing coronary artery disease.

An umbrella term, cardiovascular disease is used for referring heart and blood vessel disorders, such as heart attack, stroke, heart disease, and atherosclerosis.

Heart disease is the number one cause of death in the U.S. and accounts for 610,000 deaths every year.

Both insufficient and excessive sleep are linked with other negative health outcomes also. For instance, insufficient sleep is linked to increased inflammation, which in turn is linked to cancer and cardiovascular disease. Insufficient sleep is also believed to promote obesity.

Excess sleep, on the other hand, might be associated with heart disease because of underlying conditions which increase fatigue, such as anemia or increased inflammation.



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