You Slept 8 Hours. So Why Are You Still Exhausted?

 

Why Do I Wake Up Tired After 8 Hours of Sleep? 12 Hidden Reasons Most People Never Consider
 

You had a good night's sleep.

You had a good night's sleep, 8 hours.

The alarm goes off. However, you don't feel rejuvenated, your body feels slow and lethargic, and your brain appears foggy. You hit snooze. If so, then try again. Before you drink your coffee in the morning, you're already asking yourself how you're going to make it through the day.

If this is in your experience, you are not alone. Many people think that as soon as they feel tired they should just get some rest.

 But the realities are more complex than that. The length of sleep is but part of the equation. The events of those eight hours could be as significant as the actual numbers.

Even if you're getting to bed and staying there long enough, it can make you feel tired because of poor sleep quality, undiagnosed breathing problems, stress levels, blood sugar changes, nutrient deficiencies or even what you think are normal routines.

 Let's delve into the possibility of why you may feel tired after waking up from a full night's rest – and how you can combat it.

 

The Short Answer

If you are getting a good night's rest and yet you are feeling tired in the morning, the most common causes are:

A lack of sleep is not necessarily a problem, but rather poor sleep quality.

Breaks in sleep that you don't recall

Sleep disorders including sleep apnea or insomnia Sleep disorders (including sleep apnea or insomnia)

Stress and overactivation of the nervous system. Overactivation of the nervous system and stress.

Drops and spikes in blood sugar levels throughout the night.

Dehydration

·       Too much caffeine or alcohol

·       Deficiencies of iron, vitamin D or B12

·       Hormonal imbalances

·       Underlying medical conditions

It's important to know what it is that is interfering with your healing.

 

 You're Sleeping Long Enough, But Not Deep Enough

Not every sleep is equally restorative

During the night, your body goes through various stages of sleep:

·       Light sleep

·       Deep sleep

·       REM sleep

 

A lot of the recovery takes place during deep sleep. At this phase – tissues heal, hormones are balanced and your immune system does an important housekeeping.

REM sleep is an important time for memory, learning and emotions. Even if they are broken up into multiple times in the bed, you can experience a lack of deep or REM sleep in 8 hours of bed.

If these stages of sleep are broken up into multiple times in bed, you can still come up short on getting enough deep or REM sleep in 8 hours.

 

Common causes include:

·       Stress

·       Noise

·       Alcohol

·       Sleep disorders

·       Blood sugar fluctuations

·       Breathing problems

The result?

You technically slept for eight hours, but your body never received the recovery benefits it needed.

 

2.    Sleep Inertia: Why Your Brain Feels Broken in the Morning

Even though you've just had a good night's sleep, your brain still feels foggy and on edge in the morning. Despite good sleep the morning brain is still broken and on edge.

Ever found yourself waking up and thinking, "Oh my brain isn't working properly today.

It's called sleep inertia. When one gets out of bed and feels groggy and less alert, he or she suffers from sleep inertia.

For some it may take a couple of minutes. In other people, it may last for an hour or more.

Sleep inertia is more severe if:

·       You are awakened when you're in deep sleep.

·       You're sleep deprived

·       You don't have a consistent bedtime routine.

·       Circadian rhythm is disturbed. Circadian rhythm is upset.

That's why it's recommended by experts to wait 20-30 minutes before determining how tired you actually are.

 

3.    Your Sleep Tracker Might Be Lying to You

 

People are more likely to rely on their smartwatch than their body.

That can be problem.

Consumer sleep trackers tend to be more reliant on patterns of movement and heart rate estimates than actual brain activity. Here's the problem:

 

What Your Tracker Sees	What May Actually Be Happening
You stayed still for 8 hours	you were awake with racing thoughts
Sleep score of 90%	Multiple sleep disruption occurred
A lot of deep sleep interrupted	Recovery was broken up
Good recovery score	Overnight stress was still high.

 

It's a new trend that has emerged and is known as orthosomnia: obsessive pursuit of achieving perfect sleep scores. Paradoxically, such anxiety can actually make sleep difficult.

Don't just think about an app score, ask yourself:

·       What is the wakefulness level 30 minutes after waking?

·       Am I over-caffeinating?

·       Is it that I am not doing well concentrating?

·       Am I feeling revitalised on most mornings?

The body can tell you more than the smartwatch!

 A Hidden Sleep Disorder Could Be Disrupting Recovery

 

The most common cause for waking up feeling tired is an undiagnosed sleep disorder.

Sleep Apnea

Sleep apnea is a condition where breathing stops or becomes so shallow that it restricts during sleep.

Every time you interrupt your sleep, your brain is forced to go back to a lighter sleep state, where it can restore the airflow.

These events may not have been in your memory.

Some of the warning signs are:

·       Loud snoring

·       Morning headaches

·       Daytime sleepiness

·       Waking up gasping

·       Poor concentration Insomnia

Insomnia

A large number of people have insomnia, and spend enough time in bed, but find it hard to get a good night's rest.

Restless Legs Syndrome

It may lead to uncomfortable sensations that lead to multiple disturbances of sleep.

If you have good sleep patterns, but still feel tired, it's worth talking to your health professional about having a sleep assessment.

5.    The Hidden Airway Problem Most People Never Consider

Most people think that breathing disorders of sleep are just a problem affecting older adults who snore excessively. Not necessarily so.

A somewhat less common disorder is Upper Airway Resistance Syndrome (UARS) which can impact younger, healthy and physically fit people.

Unlike typical sleep apnea, the airway doesn't totally collapse in UARS. Rather, it gets constricted and makes breathing difficult.

Your brain keeps having to elevate alertness in order to maintain the flow of air

The result:

·       Poor recovery

·       Daytime fatigue

·       Brain fog

·       Morning headaches

Look for these indications that you might have an airway problem.

·       Dry mouth when waking up.

·       Frequent morning headaches

·       Frequent daytime sleepiness despite getting good night's sleep

·       Teeth crowding

·       Narrow dental arches

·       A scalloped tongue

Sleep induced by breathing through the mouth

Numerous people don't realize that their body anatomy might be negatively impacting their sleep.

 

 

6.    The 3 AM Blood Sugar Crash

 

Waking up between 2 AM and 4 AM is a frequent occurrence?

Blood Sugar may be a factor.

Your body tightly controls blood glucose levels during sleep.

When blood sugar dips too low during the night, the body might release:

·       Cortisol

·       Adrenaline

·       Other stress hormones

These hormones can increase blood sugar levels, and may also cause you to wake up or enter lighter sleep cycles.

 

Potential triggers include:

Consuming big amounts of sugar before sleep

Heavy evening meals

Excess alcohol

Skipping meals for extended periods of time.

These nightly changes can cause some people to experience disrupted sleep patterns without them knowing.

 

7.    Your Nervous System May Be Stuck in Survival Mode

 

You may be in a Survival Mode of your nervous system.

There's a belief that when somebody sleeps, they are recovered.

Unfortunately, this is not always the case.

There are two states of the nervous system in your body:

Sympathetic State

Also known as "fight or flight.

Characteristics include:

·       Higher heart rate

·       Increased alertness

·       Elevated stress hormones

·       Parasympathetic State

·       Also referred to as "rest and digest.

 

Parasympathetic State

Often called "rest and digest."

Characteristics include:

·        Recovery

·        Tissue repair

·        Hormonal balance

·        Deep restorative sleep

 

 

When you're checking work emails, scrolling through stressful news or getting stressed about tomorrow right before bed, your nervous system might be partially activated all night. You may be sleeping but your body is still reacting to its need to stay awake.

 

8.    Your Brain's Nightly Cleaning System May Not Be Working Efficiently

 

A scientists' network has been discovered to clear waste—called the glymphatic system. This system is used to remove metabolic waste products from the brain that build up during the day while in deep sleep. If sleep is disturbed or broken up: It may cause brain fog to get worse.

There may be a reduction in mental acuity. Recovery may suffer That's why it's essential to get to the deep sleep phase. Resting isn't just about feeling rested. It's all about giving the brain the time it needs to undertake crucial maintenance.

 

9.    Everyday Habits That Quietly Drain Your Energy

 

Fatigue can be caused by a very simple reason sometimes.

Dehydration

Fatigue, headaches and difficulty concentrating are all symptoms of even slight dehydration.

Lots of people get up in the morning feeling fatigued due to dehydration.

 

Excess Caffeine

Alcohol often helps people fall asleep faster.

However, it can disrupt deeper sleep stages later in the night.

 

Skipping Meals

A low-blood-sugar, or energy crash, can be caused by irregular eating habits.

 

Chronic Stress

Stress uses up a tremendous amount of mental and physical energy.

Any level of stress can disrupt restful sleep.

 

 Nutrient Deficiencies Can Mimic Poor Sleep

 

Sometimes the issue isn't sleep itself.

Your body may lack the nutrients needed for optimal recovery.

 

Nutrient	Possible Signs
Iron (Ferritin)	Fatigue, heavy limbs, reduced endurance
Vitamin D	Low energy, poor mood, unrefreshing sleep
Vitamin B12	Brain fog, weakness, poor concentration
Magnesium	Muscle tension, difficulty relaxing
Folate	Fatigue and reduced recovery

 

 

One particular thing that should be considered is low ferritin. There are many individuals with normal iron levels, but low ferritin levels that may also cause fatigue and restless leg symptoms.

 

Hormonal and Medical Conditions Can Play a Role

 

If someone is constantly tired, it doesn't necessarily mean that they are not sleeping well. Other factors which may contribute to this include:

 

·       Thyroid disorders

·       Hormonal imbalances

·       Chronic inflammation

·       Diabetes Menopause-related changes

·       Autoimmune conditions

 

Medical evaluation is important if symptoms persist despite making lifestyle changes.

 

 

12.                   Blood Tests Worth Discussing With Your Healthcare Provider

 

A health care provider might want to consider testing for the following:

 

·       Ferritin

·       Complete blood count (CBC)

·       Vitamin D

·       Vitamin B12

·       Thyroid function tests

·       Blood glucose markers

·       Hormonal assessments

 

 

These tests may sometimes identify contributors to fatigue which are not evident by symptoms.

 

Sleep Myths vs Reality

 

·       Fact: If I sleep eight hours, I should feel great.

·       Truth: Sleep quality sometimes is as important as sleep quantity.

 

·       Myth: Alcohol helps you sleep.

·       Reality: Alcohol could help you fall sleep, but likely interfere with restful sleep later on.

·       Fact: Mythical Tracking: Your sleep tracker can't tell you how you slept.

·       Truth: Consumer products approximate sleep measurements and don't measure brain activity.

 

·       Fact: Breathing problems during sleep don't just happen to snorers.

·       The truth is that reality can be something that can happen to people who don't snore much.

 

Medical Advice – When?

 

 If you think you might need to talk to a health care provider, you should do so if: Fatigue lasts for several weeks or months.

 

Experiencing breathing problems and often waking up gasping for air. You have an excessive daytime sleepiness (excessive sleepiness during the day) Your symptoms interfere with work or with your daily activities You suspect that you have a sleep disorder Changes in lifestyle will not give you better energy.

 

When the cause of the persistent fatigue is known, it usually can be treated.

 

The Bottom Line

 

 

If you are tired after 8 hours of sleep, it doesn't necessarily mean you need more sleep. Sleep disturbances, breathing issues, stress and anxiety, blood sugar imbalance, nutritional deficiencies or medical conditions are all common factors to consider.

 

The positive news is that fatigue is frequently a red flag not a life sentence. Pay attention to what your body is telling you.

Not all the time the solution is to sleep more. It's enhancing the way you sleep while you sleep. It’s optimizing the way you sleep while you sleep.

 

 

 
Frequently Asked Questions

 

After sleeping for 8 hours, why am I feeling fatigued?

 

Getting eight hours of sleep may not equate to eight hours of restful sleep. Poor sleep, frequent awakenings, blood sugar swings, nutrient deficiencies, stress, and sleep apnea or Upper Airway Resistance Syndrome (UARS) are all factors that can keep you from getting a good night's sleep.

 

Is it possible to sleep 8 hours and be sleep deprived?

 

Yes. It is not only about the number of hours in bed that makes you sleep deprived. You may also wake up tired after having a full night's sleep if your sleep is interrupted on a regular basis or if you don't get enough deep and REM sleep.

 

I'm waking up at 3am every night, why?

 

Waking up multiple times from 2 – 4 AM have been associated with stress hormones, blood sugar issues, alcohol, sleep disturbances, environment factors, and/or hyperarousal from anxiety. If this occurs repeatedly, then it's a good idea to talk with a health care provider.

 

When I have a good night's sleep, my sleep tracker still says that I had a poor night's sleep. I have a good sleep but my sleep tracker says I had a bad sleep.

 

The majority of consumer sleep trackers rely on movement, heart rate and other indirect measures of sleep. They are not able to directly assess brain activity as a clinical sleep study can. This means, that if you had a poor sleep quality, your tracker can still give you a good sleep score.

 

Is there a correlation between stress and fatigue?

 

Absolutely. Chronic stress maintains an "alert state" in the nervous system. Even if you sleep for a long enough period, your body may not be able to go deep enough into the sleep cycles that are required for optimal physical and mental recovery.

 

Tiredness after sleep is due to which Vitamin Deficiency?

 

There are a number of nutritional deficiencies that can lead to fatigue:

 

Low ferritin levels (IDF), particularly, is a risk factor. Low ferritin levels (IDF) is a risk factor, particularly.

·       Vitamin D deficiency

·       Vitamin B12 deficiency

·       Folate deficiency

·       Magnesium deficiency

 

There's only one way to find out if your symptoms are due to a deficiency: proper testing.

 

I have a dry mouth and am tired in the morning, why?

 

If a patient complains of a dry mouth in the morning, it could be a sign of mouth breathing during sleep. Mouth breathing may lead to poor sleep quality, high airway resistance and to poor overnight recovery. It may also be a symptom of snoring, nasal congestion or sleep-disordered breathing.

 

Is dehydration capable of making you feel fatigued in the morning?

 

Yes. Mild dehydration can impact one's energy, concentration and mood. Not drinking enough fluids during the day may leave you feeling sluggish and fatigued the following morning.

 

Is it normal to feel tired every morning?

It's normal to have a few lazy mornings, particularly if the week has been hectic or the night's been long. When you feel tired more than one day a week after getting a good night's sleep, however, that's not something you should shrug off and could be a sign of a problem with your sleep, medical or lifestyle.

 

Is it possible to have a normal iron test and still be tired because of low iron?

 

Yes. Others have normal levels of iron but low levels of ferritin, indicating low levels of stored iron. The low levels of ferritin can lead to fatigue, restless leg syndrome and impaired recovery. Further testing may be needed and can be determined by a health care professional.

 

How can I find out if I have a sleep disorder?

 

Common Warning Signs are:

 

·       Loud snoring

·       Gaining consciousness gasping for breath

·       Excessive daytime sleepiness

·       Morning headaches

·       Difficulty concentrating

·       Restless sleep

·       Excessive sleepiness even when getting a good sleep

 

If you have these symptoms, it may be beneficial to have a medical evaluation.

 

If I have trouble getting up in the morning what should I try tonight?

 

There are three easy changes to make:

 

Avoid caffeine 8 hours prior to sleep time.

Maintain a regular sleep and waking up routine.

Try to limit screen time and bright lighting for 30-60 minutes prior to sleep.

 

If symptoms persist for several weeks after you have made good sleep strategies then consider talking to a health care professional.

 

Medical Disclaimer

 

The information contained in this article is for educational and informational purposes only and is not meant to be medical advice. Not intended to diagnose, treat, cure or prevent any medical condition. Many factors contribute to sleep problems, tiredness and lack of energy, some of which may be caused by underlying medical conditions that need medical evaluation.

 

If you have any of these symptoms, or you feel very tired or sleepy in the day, have loud snoring, breathing problems at night, or are feeling tired for no reason, please seek advice from your health care professional and get tested if necessary.

 

Don't overlook medical advice or put off going for a medical checkup due to advice contained in this article.

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