When it comes to quality sleep, you may say, I know! Sleeping eight hours a night is enough. But you know what? The eight hours of sleep theory has not been scientifically proven, and if you are constantly obsessing over getting a full eight hours of sleep every night, you might end up more stressed about not sleeping enough on the days you are too busy. So why is eight-hour sleep time illogical? According to this book, sleep is different from one person to another, and it is not necessary to focus on the length of sleep but to view sleep as a process of restoring the body and mind 24 hours a day, seven days a week. How can we achieve this? We will elaborate it later.

This book provides us with a program to improve the quality of sleep, which will overturn the traditional 8-hour sleep theory and help us adjust our sleep in all aspects, starting from the R90 sleep cycle. You will learn to monitor your sleep quality by days, weeks, and months, reducing unnecessary anxieties and enabling you to get quality sleep even in stressful situations.