🚀 The Book in 3 Sentences

  1. In order to have a better performance and better health, we should sleep 7-9 hours
  2. Sleep is our superpower
  3. If we prioritise sleep over work hours, our work hours could be more productive
Juan David Otálora-Díaz (@juanotalo) - Profile Photo



Book Summaries

Why We Sleep

by Matthew Walker


It all comes from the notion of circadian rhythm, which is simply your 24-hour rhythm. If we make it change constantly, by waking up at a different hour everyday of most of the days, it will not be able for our body to regulate our energy-levels.

  • It made me more aware of the importance of sleep
  • It made me realize how our society is priving us from enjoying better performance
  • It made me change my habits, now 7-9h of sleep for me are a must

This is one of my favourite books of all time, I have always known about the importance of sleep, but after reading this book, I started to take sleep really serious, making it the engine of my "productivity machine"

I think everyone should read it, it is definitely directed to everyone, since all of us has to conmute to bed every single day. Maybe, it is a great way to introduce yourself to health-related topics, the way the author explains the topic makes it accesible to all of us.

  • It boosts memory retention
  • It helps preventing plenty of diseases
  • It improves athletic performance

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There are two main reasons we go to sleep:

  • Circadian rhythm: Every living creature on the planet has some sort of sleep-wake cycle
  • Sleep pressure: Every second you’re awake, a chemical called adenosine is compiling up in your brain. The concentration of this substance is increasing your desire to sleep
Why We Sleep

by Matthew Walker

Early theories about dreaming

Sigmund Freud and Carl Jung put forth some of the most well-known theories of dreaming.

  • Freud's theory was that dreaming allows us to sort through unresolved and repressed wishes.
  • Carl Jung also believed dreams had psychological importance but differed about their meaning.


....sleep next to their smartphones. 

It makes it much harder to go back to sleep,  since the blue light emitted acts as a stimulant. 

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