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Why is it important to get enough sleep?

Do you know the lack of sleep has the deep impact on your routine activities and on your personality? Many neglected this fact and next morning they take strong coffee or Energy drink to cheer. We will discuss why it is important to get enough sleep and why sleep is vital to our mental and physical health.

Why do we sleep?


The first question that scientists are trying to answer – why a person sleeps?

Scientists have developed several theories that explain why we spend a third of life in sleeping.

1.Theory energy conservation

According to this theory, the main function of sleep is to preserve resources of the body for the energy consumption during the day and evening. In nature, it so happened that the day and night time is the best for hunting and searching for food.

Studies have shown that human metabolism is reduced by 10% during the night, which supports this theory.

2. Theory of inactivity

According to this theory, sleep helps a person to survive because at night we are the most vulnerable because of darkness. At night we stay silent and motionless, that helps to avoid the eye of predators that might eat or kill us.

3. Recovery Theory

This theory is based on the fact that a full sleep helps the body restore its function.

Numerous studies on humans and animals have confirmed this theory. It has been discovered that muscle growth, cell regenration and protein synthesis occur during sleep.

4. The theory of brain functioning

One of the current theories argues that sleep affects brain functioning.

Sleep plays an important role in brain development of children because kids are sleeping about 13-14 hours a day.

And adult sleep reduces the ability for mastering new information and impairs productivity during the day.

As reflected in the health of the lack of sleep?

Each of us sees that lack of sleep negatively affects mood, besides feeling fatigue during the day and have no desire to do anything.

But most do not realize that regular lack of sleep contributes to the emergence of serious diseases such as high blood pressure, diabetes, cardiovascular and other diseases.

According to Harvard Medical School, chronic lack of sleep leads to the following consequences:

1. Weight gain due to changes in hormone levels

Lack of sleep is one of the causes of obesity. According to studies, people who sleep less than 6 hours per day have a higher body mass index, relative to those who sleep 8 hours.

During sleep, the body produces hormones that control appetite and glucose metabolism. When we do not get enough sleep, then there is an imbalance in hormone production. Increased stress hormone cortisol, increased secretion of the hormone insulin after a meal. Decreased levels of the hormone leptin, which sends a satiety signal to the brain, while ghrelin increases, which increases the appetite.

As a result, after a hearty dinner, again there is a desire to eat, increased craving for sweets as a quick source of energy.

2. The risk of heart disease

It is proved that people suffering from hypertension have increased pressure on the next day, after a sleepless night.

And people who sleep less than 6 hours a day, probably located in autonomic cardiovascular diseases.

These findings explain the link between lack of sleep and heart disease.

3. Reduced immunity

The study found that people who sleep at night to fully cope with the disease better. And people who regularly do not get enough sleep often get sick.

4. The reason for the bad mood and tiredness

Do you notice that the day after a sleepless night, you feel tired and easily annoyed at others?

This reason for anybody, not news, but studies have shown that the regular lack of sleep is very likely that you will always be in a bad mood.

5. Reduced ability to concentrate and memory impairment

The study investigated were up more than 16 hours. Reduced ability to concentrate, memory loss, drowsiness – the changes in brain activity that have been discovered by scientists using EEG.

Everyone who spent only one night without sleep concentration decreased significantly, logical thinking, mathematical potential and ability to assimilate new information.

How many hours of sleep you need?

The best way to answer this question – listen to yourself. How much hours you need to feel fully rested? 6-7 or 9-10 hours? Each person is different, there is nothing wiser own body, just need to learn how to hear.

The number of hours for a full sleep depends on genetic factors and your age. Scientists at Harvard University advised not to include the Service while on vacation and sleep as much as you want, so you will be able to determine the optimal amount of sleep hours for you.


Get enough sleep – a pledge of good mood, beautiful shape, vitality and good health.

Go to sleep in a room with the windows open, do not eat for 3-4 hours before bedtime, enjoy mint tea before going to bed and take away the bed away from the gadets like mobile phone, laptop, tablet. This will help you easily fall asleep and wake up cheerful!

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