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Is 4 hours of Sleep Enough? How to Feel Rested


A good night's sleep not only makes you feel good, but it also promotes your brain function and overall health. The majority of humans require more than seven hours of sleep per night for optimal health. Children and adolescents require much more development support. Teenagers should sleep 8 to 10 hours per night, elementary students 9 to 12 hours, and toddlers 10 to 13 hours. Many individuals wonder if it's possible to "hack" their sleep so that they may spend less time in bed and still feel rested and productive upon waking. The brief response is both yes and no, but largely no. The quality of your sleep influences how refreshed you will feel upon awakening. Improving the quality of your sleep can lower the number of hours you must spend in bed.

Even if your sleep quality is excellent, sleeping less than the required number of hours is damaging to your health and mental efficiency. You might be able to do it for a few days, but ultimately your lack of sleep will catch up with you. Continue reading to learn why it is impossible to feel rested after receiving only four hours of sleep per night for an extended length of time. We will also investigate why some people appear to require considerably less sleep than others.

Related Link: Natural Sleep Aids: Remedies to Get to Sleep Fast




Is Four Hours of Sleep Per Night Healthy?

No matter how well a person sleeps, 4 hours of sleep per night is insufficient for the majority of people to feel relaxed and cognitively aware upon waking. There is no evidence that the body properly adjusts to chronic sleep deprivation, despite the widespread belief that it is possible. In addition, habitual exercisers frequently require more than the minimum suggested hours of sleep to allow their bodies to recover from the added physical stress. A study of the sleep patterns of more than 10,000 people revealed that receiving 4 hours of sleep every night was equivalent to adding 8 years to the participants' brains.

Long-term exposure to less than seven hours of sleep per night may raise the risk of acquiring issues such as:

  • Depression
  • Obesity
  • Hypertension 
  • Anxiety 
  • Diabetes 
  • Sleep apnea 
  • Stroke
  • Psychosis 
  • Coronary artery disease
  • Sleep need genetic mutation

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Genetic Mutation

Regarding how much sleep you need, there is one caveat: everyone's body is different, and some people can live on fewer hours of sleep than others. Scientists have identified an uncommon mutation of the ADRB1 gene in individuals who can feel refreshed on less than 6.5 hours of sleep per night without evident negative health effects. Though you inherit this gene mutation, you may feel refreshed even if you habitually sleep less hours than the recommended amount.

Polyphasic Sleep

Polyphasic sleep is defined as sleeping numerous times throughout a 24-hour period, as opposed to sleeping once every night. There are numerous polyphasic approaches available. Taking six twenty-minute naps equally spaced throughout the day for a total of three hours per day is one of the most common strategies. Numerous folks believe that polyphasic sleep allows you to sleep more effectively and receive the same amount of rest in less hours. There is no scientific evidence that polyphasic sleep is superior to regular sleep. Sleep deprivation associated with polyphasic programs probably has the same detrimental health effects as other forms of sleep loss. Since the vast majority of people who follow polyphasic programs only adhere to them for a brief period of time, there is limited study on these types of programs.

How to Sleep Less and Gain Energy

It's not a good idea to cut your sleep short on a regular basis, but when life gets hectic, it's often impossible to sleep adequately for a few nights. The more nights you sacrifice sleep, the greater your "sleep debt" will be. As with financial debt, the more your sleep debt, the more difficult it is to pay it off.

There is no magical method to improve energy while reducing sleep. However, the following approaches may help you endure brief episodes of sleeplessness.

  • Get some light exercise. Light exercise can momentarily boost blood flow to the brain and make you feel more alert. However, vigorous exercise may leave you feeling even more exhausted.
  • Avoid screen usage one hour prior to bedtime. Screens emit blue light, which may interfere with the circadian cycle and melatonin production of the human body.
  • Keep electronic devices and other interruptions out of your bedroom. Removing your phone and other potential distractions from your bedroom can help you reduce sleep-robbing inactivity.
  • Make sure your room is dark. Bright lights in your bedroom may inhibit your body's natural melatonin production.
  • Reduce caffeine consumption. Caffeine is a central nervous system stimulant that can alleviate sleepiness.
  • Eat a nutritious diet. Eating a balanced diet could provide you with extra energy throughout the day.
  • Avoid alcohol. Alcohol has a sedative effect that lowers central nervous system activity and can cause drowsiness.
  • Avoid drinks before bed. Avoiding drinks minimizes the likelihood of having to use the restroom in the middle of the night.
  • Try napping. Taking 20-minute naps throughout the day may help you refresh without inducing drowsiness.
  • Spend time outdoors. By boosting the creation of serotonin, exposure to sunlight may increase one's concentration.

Negative Implications of Insufficient Sleep

If you experience the following side effects, it's likely an indication that you need more sleep. The next several nights should be spent prioritizing sleep until your mental function returns to normal.

  • Sleepiness 
  • Irritability and mood swings 
  • Changes in appetite 
  • Frequent yawning 
  • Low productivity and concentration 
  • Poor decision-making 
  • Forgetfulness 
  • Recurrent illness

Function of the Sleep Cycle

During the night, your body passes through four stages of sleep. One cycle lasts around 90 minutes. During a typical night of sleep, you will cycle between four and six times through each stage. If you restrict your sleep to four hours, you will only have time to cycle through these stages twice.

The Stages of Sleep

  • N1. This stage of sleep is the lightest and lasts between 1 and 5 minutes. During this phase, your respiration, pulse rate, and muscles relax.
  • N2. This phase lasts between 30 and 60 minutes. Your respiration and heart rate reduce further, and your body temperature decreases.
  • N3. Deep sleep is also known as the third stage of sleep. During this interval, which lasts between 20 and 40 minutes, the body heals damaged cells and tissues.
  • Rapid eye movement (REM). REM is the sleep stage most commonly linked with dreaming. The initial REM cycle lasts approximately 10 minutes, while the final one might last up to an hour.

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Getting Enough Rest

When it comes to the amount of sleep we need, there is no one-size-fits-all answer. However, most adults generally need between 7 and 8 hours of sleep each night to feel rested and function at their best. If you’re regularly getting less than 4 hours of sleep, it’s likely that you’re not getting enough rest. Not getting enough sleep can lead to a number of health problems, including anxiety, depression, weight gain, and more. If you want to improve your energy levels and overall well-being, make sure you’re getting enough rest. Sleep is an important part of our daily routine and should be given the attention it deserves. 

Related Link: How to Not Be Tired in the Morning: Best Ways

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