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Why You Shouldn't Oversleep? 8 Facts With Research

Drew is a professional pharmacist and researcher. Knowledgeable about herbal plants through pharmacognosy.

Although it is also true that sleep is a necessity for better health. All things in excess can be bad. Unfortunately, that includes diving into your dream world too much.

The thing is, most of us treat oversleeping as something normal. We love to link it to simple fatigue or anything else under the sun. You might even have considered it as a mere response of your body to hangovers, overwork, and others.

Still, have you ever asked yourselves, what does oversleeping do to me? I guess a few of you might have asked this question.

Let’s get straight to the point. Is oversleeping bad for my health? The answer is a big fat yes. Hey, do you expect something else? Hypersomnia, also known as oversleeping, is unhealthy just like lack of sleep. It happens when you get as many as 10-12 hours of sleep.

Anyway, many bed huggers will scowl from this information. To convince you, let me show you research-based facts from reputable journals.

What are we waiting for? Let’s flip those veils and mattresses away. Here are ten reasons why you shouldn’t oversleep. Time to start reading

1. Oversleeping Increases Risk of Diabetes

It’s a bit hard to believe right? Even so, evidence points out that oversleeping is associated with and diabetes.

A study from PLOS One showed that oversleeping increases the risk of diabetes. Yep, just like lack of sleep. It goes on both sides. The best thing is going for the just-right amount of sleep.

A study from Taiwan showed that sleeping for 7-8 hours is the perfect number. This right range of sleep will tip down your chances of getting type 2 diabetes. Consistent and uninterrupted sleep is also a big factor to taper diabetes risk.

So, if you have a family history of diabetes mixed with other risk factors. You should strive to get the perfect nap time. If we can cut down the risk, why not right?

2. Oversleeping, Migraines, and Headaches

Experiencing those stinging headaches after waking up from sleep? Though, it might simply be a hangover. It can also be a headache induced by excessive sleep.

An article from Cerebrum showed oversleeping can cause headaches such as migraines. Staying up too late, or waking up earlier than usual can also cause these nasty headaches.

Oh, don’t forget lack of sleep can also trigger migraines and headaches. It goes both ways.

So, how much sleep is enough? Let's check the sleeping duration recommended by the National Sleep Foundation.

Age GroupIdeal Sleep Duration

Newborns (0–3 months)

14–17 hours

Infants (4–11 months)

12–15 hours

Toddlers (1–2 years)

11–14 hours

Preschoolers (3–5 years)

10–13 hours

School children (6–13 years)

9–11 hours

Teenagers (14–17 years)

8–10 hours

Adults (18–64 years)

7–9 hours

Older adults (65+)

7–8 hours

3. Oversleeping, Depression, and Anxiety

You might have thought that depression and anxiety only make it hard to sleep. Friends, you are wrong. You might not have heard of this. Oversleeping and depression are also connected. Who says? Well, scientific data and studies show us that fact.

Studies have shown that oversleeping can also be a sign of depression as well as anxiety. Most of the time, it can also be accompanied by over-eating.

However, oversleeping as a depression symptom is atypical most of the time. Atypical what? Heck, it only means that it happens in a limited group of people. So not everyone, okay?

4. Oversleeping Is Bad for the Heart

Oversleeping is not heart-smart. Yep, researchers have bothered themselves to associate oversleeping with heart disease.

Studies showed that sleeping more than nine hours can increase the risk of ischemic stroke. The risk increases further, especially in postmenopausal women.

Researchers also suggest that oversleeping increases their chances of getting a hypertensive disease

A study in Japan showed that oversleeping increases the risk of arterial stiffness. I’m sorry for the bothersome words, again. Anyway, arterial stiffness is linked to two well-known diseases - atherosclerosis and arteriosclerosis.

Still, feeling confused? Google has the answers. Just be sure to go on authoritative sites.

5. Oversleeping, Dementia, Alzheimer's, and Cognitive Impairment

Many of you might have experienced brain fog. Researchers have shown that oversleeping can affect our memory and cognitive faculties. In what way? The bad way.

Studies have shown that oversleeping increases their risk of dementia by at least 35%. It also increases the risk of mild cognitive impairment by the same percentage. The risk may even increase along with old age as well as other co-morbidities.

Do you know that oversleeping also increases your risk of dementia? Or worse, Alzheimer’s disease. Yep, you read it right.

Oversleeping can also increase your chances of getting Alzheimer’s disease. After all, dementia is the common beginning of Alzheimer’s disease most of the time.

6. Oversleeping Lowers Chance of Conceiving

6. Oversleeping Lowers Chances of Conceiving

For couples wishing to have a child, oversleeping can hamper chances of conceiving.

A published study at Sleep Medicine Reviews showed us an interesting finding. Oversleeping, just like lack of sleep, can lessen your chances of having that lovely baby.

Oversleeping can suppress, augment, and affect reproductive hormones responsible for conceiving.

So if you want to have that child, try fixing your sleeping habits. Set your time of sleep and stick to it. Try looking out for tips that can make your sleep better and healthier.

7. Oversleeping and Hateful Weight Gain

Oh, this one is my favorite topic. Well, maybe not only me.

Let’s zero toward the main question. Does oversleeping cause weight gain? The answer is yes.

A study from the Sleep Journal showed that oversleeping can indeed make you gain weight. Well, extra sleep is equal to extra pounds. Long sleepers live with an increased risk of higher body weight and fat gain.

So if you want to shed weight, getting the right sleep is essential. One must sleep not too little, but also not too much. Just the perfect amount of sleep. Oh, don’t forget to exercise regularly and eat the right food for better results.

8. Oversleeping and Higher Risk of Death

A lot of you might have overslept simply because of overwork and fatigue? But have you considered that oversleeping is also linked to higher death risk? Yep folks, researchers have found that oversleeping is associated with higher death risk. That excessive sleep can send you faster to your grave.

How come? Well, how about looking at the other effects of oversleeping above. Had a good look? Oversleeping is linked to various diseases that can literally shorten our lifespan.

So, can over oversleeping cause death? Well, not oversleeping, but the risk tied with it. Simply put, the health risk correlated with oversleeping might send you to an early grave.

Long sleep duration has been associated with various health issues. Adverse health outcomes such as depression, cardiovascular diseases, and stroke. It also increases your risk of obesity, diabetes, and coronary heart disease. No wonder long sleep is linked to an early death.

Oversleeping with difficulties in sleeping and daytime sleepiness increases death risk further.

So better arrange not only your sleeping time but also your wake up time. A simple fix can get you a long way.

The Takeaway

Hey, just to be clearer than glass. Sleep is not bad. But once abuse, that’s a different story. You must set both your sleeping time and waking time. If you are a long sleeper or short sleeper. It is in your best interest to get that good sleep. Get that right amount.

Do try looking for that perfect alarm clock to wake you up. It can be your smartphone alarm if you want. After all, it’s far cheaper and effective.

You can also set your sleeping schedule. Practice waking up and sleeping at a specific time every day. It will help your body to set its own alarm. Believe me, you will be surprised by the results.

More Oversleep Effects? Let's Watch


  • Lin, C. L., Tsai, Y. H., & Yeh, M. C. (2016). Associations between sleep duration and type 2 diabetes in Taiwanese adults. A population-based study. Journal of the Formosan Medical Association. Taiwan Yi Zhi, 115(9), 779–785.
  • Cappuccio, F. P., et al. (2010). Quantity and quality of sleep and incidence of type 2 diabetes. A systematic review and meta-analysis. Diabetes Care, 33(2), 414–420.
  • Ahn, A. H., & Goadsby, P. J. (2013). Migraine and sleep: new connections. Cerebrum: The Dana Forum on Brain Science, 2013, 15.
  • Koffel, E., & Watson, D. (2009). The two-factor structure of sleep complaints and its relation to depression and anxiety. Journal of Abnormal Psychology, 118(1), 183–194.
  • Chen, J. C., et al. (2008). Sleep duration and the risk of ischemic stroke in postmenopausal women. Stroke, 39(12), 3185–3192.
  • Yoshioka, E., et al. (2011). The relation between self-reported sleep duration and arterial stiffness. A cross-sectional study of middle-aged Japanese civil servants. Sleep, 34(12), 1681–1686.
  • Chen, J. C., et al. (2016). Sleep duration, cognitive decline, and dementia risk in older women. Alzheimer's and dementia. The Journal of the Alzheimer's Association, 12(1), 21–33.
  • Kloss, J. D., et al. (2015). Sleep, sleep disturbance, and fertility in women. Sleep Medicine Reviews, 22, 78–87.
  • Chaput, J. P., et al. (2008). The association between sleep duration and weight gain in adults. A 6-year prospective study from the Quebec Family Study. Sleep, 31(4), 517–523.
  • Hedström, A. K., et al. (2019). Association Between Insomnia And Mortality Is Only Evident Among Long Sleepers. Nature and Science of Sleep, 11, 333–342.

This content is for informational purposes only and does not substitute for formal and individualized diagnosis, prognosis, treatment, prescription, and/or dietary advice from a licensed medical professional. Do not stop or alter your current course of treatment. If pregnant or nursing, consult with a qualified provider on an individual basis. Seek immediate help if you are experiencing a medical emergency.

© 2020 Drew Agravante


Drew Agravante (author) from Philippines, Currently in Qatar on September 07, 2020:

Hi Dora,

Even I discovered and learned a lot during my research about oversleeping. Anyway, I'm glad it helped. Thanks for reading.

Dora Weithers from The Caribbean on September 07, 2020:

Lots of surprises here. Number 6 is at the top, for me. Thanks for the research and the presentation.

Drew Agravante (author) from Philippines, Currently in Qatar on September 06, 2020:

Hi Denise,

I can totally relate to that. Personally, I am also suffering from oversleeping. That's why I always put my morning alarm at full volume. Thanks for reading.

Denise McGill from Fresno CA on September 06, 2020:

I've had a problem with oversleeping in the past and I believe it is connected with weight gain and with depression. It is a hard habit to break.



Drew Agravante (author) from Philippines, Currently in Qatar on September 04, 2020:

Thanks for reading, Adrienne. I am glad my article was able to confirm and clear some of your thoughts.

Adrienne Farricelli on September 03, 2020:

This is very interesting. My hubby has suffered from week-end migraines for years and I attributed this to changes in sleeping patterns as he used to sleep longer. Your article provides the evidence I needed for something that I assumed to be anecdotal.

Drew Agravante (author) from Philippines, Currently in Qatar on September 03, 2020:

It's nice to hear from you, Vikram. I'm glad I was able to share some interesting information with you. I better make more then.

Drew Agravante (author) from Philippines, Currently in Qatar on September 03, 2020:

Thanks for Passing by Liza. It's really good to hear from you. As for me, I'm a bad sleeper. I go both ways. Sometimes too long, most of the time too short.

Vikram Brahma from Assam, India on September 03, 2020:

Good article my friend. Yes, you are right oversleeping has many disadvantages. I really enjoyed reading your article and get to know many things. Thanks for sharing your article.

Liza from USA on September 03, 2020:

Hi Drew, great article! As far as I remember, I am a good sleeper. I tend to sleep average (7-8 hours) as an adult woman. I prefer being on the bed on time so I get my 8-hour sleep and wake up on time. I feel like if I overslept, my body feels lazy and tired the next day. Thanks for the article, Drew.

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