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The book Why We Sleep by the American writer Matthew Walker talks about the many advantages of sleep,
The correct sleep, as the writer talks about, extends your life, strengthens your memory, makes you maintain your grace, makes you more beautiful in the eyes of onlookers, opens your appetite for food better, protects you from the evil of cancer and Alzheimer’s, protects you from the possibility of disease and makes you happy in your life and keeps you away from depression, worry and gloom. And more, you just have to sleep between 7 to 9 hours every night, and take some measures to get a good sleep every night.

The application of the book Why We Sleep by the American writer Matthew Walker explains very much the three main pillars of human health: sleep, diet and exercise. The writer goes further, saying that sleep is the solid foundation without which neither diet nor exercise will benefit you.
The author, a professor of neuroscience at the University of Berkeley, is based in this book largely on the research carried out by himself or a group of specialists in sleep science, which has made a great leap during the past two decades.
The book is divided into four sections. The first section introduces the nature and types of sleep, the biological/evolutionary history of sleep (do animals also sleep and how, when sleep appears, etc.), in addition to changing the nature of human sleep through the various stages of his life.
The second section answers the question of why we should sleep and reviews the consequences of not getting enough sleep every night, before moving to talk about the world of dreams in the third section, to answer the question of how we dream and why, and whether dreams play an important role in the information life cycle in our minds, or is it just a side issue. Before closing the book with a chapter on the consequences of lack of sleep at the level of societies (not just individuals)
The author infers a set of experiments on mice, where they were prevented from sleeping for several days, and compared to a group of mice that were deprived of food. It was found that mice that were deprived of sleep all died before those that were forbidden to eat, and many studies have shown that there is a direct relationship between insufficient sleep and several Diseases such as high blood pressure, diabetes and even Alzheimer's disease
The writer points out that there are two great politicians who are known for their poor sleep, Margaret Thatcher and Ronald Reagan, both of whom ended up suffering from Alzheimer's disease.
Unfortunately, no sleep loss can be compensated for. Sleeping long during the weekend is not enough to make up for the shortfall you recorded during the week, and every missing hour of sleep has a direct impact on all aspects of your life and your mental and physical health.
We cannot summarize this book here. If you are concerned about your health, all you have to do is download this book and read it carefully.
The book application Why do we sleep by the American writer Matthew Walker is a very small application and does not take up much space in the phone memory, designed to fit all devices

Application features:
- User-friendly interface
The book is divided into parts
- clear reading
Sleep pictures and information
- Summary of the book read and audio

Go to bed at the same time every day to set your biological clock.
Give yourself time to relax before bed
Dim all the lights in the sleeping area
Avoid using your phone or computer while trying to fall asleep.
Avoid stimulants such as caffeine for 8 hours before your bedtime.