100 comments

  1. Mathew is very knowledgeable, into his field, and a great communicator. Sleep always been a very interesting thing to me and it's awesome seeing someone like him studying and spreading information in this field.

  2. SOMETHING IS HAPPENING TO ME…I HAVE NOT SLEPT ONE WINK OF SLEEP IN OVER 3 YEARS AND NO ONE BELIEVES ME…i SPEND MY NIGHTS IN A 6 HOUR HYPNOGOGIC STATE , MEDITATING AND PRAYING WHICH i BELIEVE WITH ALL MY HEART IS THE ONLY REASON I'M ALIVE TODAY …i CAN LEAVE MY PHYSICAL BODY AT WILL BUT I CAN ONLY GO SO FAR AWAY FROM IT…i FEEL LIKE MY BODY IS DYING BUT MY MIND AND SOUL IS MORE ALIVE THAN I HAVE EVER BEEN…MY WIFE AND MY MOTHER ARE THE ONLY ONES WHO KNOW THIS IS REAL…i HAVE LOST 35 POUND IN THIS PAST YEAR WHICH MAKES ME A WOPPING 125 LBS….4 YEARS AGO i WAS 180… i DON'T EVEN KNOW WHY I'M SENDING THIS TO YOU…I GUESS JUST TO LET PEOPLE KNOW I SUPPOSE. i'M WILLING TO TAKE ANY TEST, SLEEP STUDY OR ANYTHING TO PROVE MY CASE…PLEASE HELP ME!!!! i'M 37 YEARS OLD FROM RHODE ISLAND…I;M NOT A LIAR..

  3. Matthew Walker is a genius! I made a video about his book Why We Sleep on my channel, here is the link if you fancy checking it out, the book is awesome 馃檪 https://youtu.be/bujnek18uu8

  4. is virtual reality through dreams sequence real? Are they able to hear your thoughts? Are people able to read your mind ?

  5. I've been working in a place for 3 years of constant sleep deprivation regularly doing 20 hr work marathons with half hour naps here and there, I've no excuse for that, but that's the time I started loosing hair on alarming scale, I was looking like a professional alcoholic, of course I was consuming lots of bread and sugar too, but sleep improved my health considerable after quitting the job and sleeping well for several months.

  6. Absolutely the best lecture I have ever heard. I might be over 30 years too late. I have had chronic fatigue insomnia for over 25 years. I learned that sleep was an important factor amongst other things long time ago. I have been on sleep medications since then which still only gave me 5-6 hours sleep every night. I have been a caffeine addict because I felt that was the only thing that gave me noticeable amount of energy. After doing all kinds of diets supplements and exercises I realise sleep is the single most important thing above anything else. I have such a lot of memory problems, fatigue and loads of other symptoms. I don't know if I can reverse 30 years of damage, but If I can halt full blown dementia and other conditions, I will be happy. So my New Year resolution is to work on my sleep a top priority. Which means- exercise early , go in the sun, good diet, meditate, try to control stresses, no caffeine after 2 and try to wean off it. No blue light after 9. Go to bed by 10 and sleep in the dark. Try to wake up naturally and work on getting 8 hours sleep. Thank you so so much!

  7. I lived in Argentina for four years as a kid. There you have the option to go to school in the morning or in the afternoon! Amazing! I went to the afternoon school and was never happier as a kid

  8. Good talk, but the audio, multi billion dollar company, nobody knows how to setup the mans microphone/compressor. It's horrible. Jabbing away the sound every minute for seconds on end. Barely able to listen to it. In video terms, you are listening to 144p audio quality, on top of the wrong compressor settings. Really guys?

  9. I wonder if vehicle accident reduction at 16:50 can be attributed to a different traffic pattern vs more sleep

  10. Fabulous presentation! Question: With sleep deprivation MRIs resembling those of all psychiatric illnesses, have any studies be done on the effects of inducing sleep in psychiatric patients for longer periods of time, say 10 hours or more per night while monitoring sleep cycles? Does induced sleep through the use of sleeping pills illicit the same effects as natural sleep? Can the effects of years of lost sleep be mitigated by adherence to an 8 hour sleep cycle? Thank you very much for making these lectures public!

  11. You do understand Dr I lost my sleep completely when you said my body produces cancer
    Give me advice if I have a lifestyle where I work during the night and sleep during the day ?

  12. I don't know why we dream
    But I've the answer of why we sleep….. it's not a ordinary same answer…… I just crack it yesterday night
    I hope it's caught Google attention

  13. I need help. I have lost so much with insomnia. I鈥檝e tried so much & given up hope of getting good sleep. Now I鈥檓 thinking if I don鈥檛 get help I鈥檒l have full blown Alzheimer鈥檚 within a few short years.

  14. I am a Muslim and surprisingly enough much of the things he is saying are Islamic teachings and prophetic practices as that of going to sleep early and giving the body it's right to proper sleep and rest and also morning time being efficient to learning activities.

  15. I don't doubt the main points, but that thing about daylight savings time causing heart attacks seems to be mostly bogus. Have a look at this interpretation, for instance: https://youtu.be/XZGs5Im9f8Q

  16. Oh that part about the placebo effect is most probably wrong. As I understand, modern research shows that placebo effect does not objectively improve anything, It is just an illusion of an improvement based on biased perception. In other words, it only affects subjective judgement of symptoms, not health.

  17. Unfortunately I鈥檓 discovering this true too late. As an international airline pilot, I wish I knew this information 25 years ago. Don鈥檛 let you children to become a pilot for the sake of their health

  18. Dang…. I was really curious about how naps factor into these cognitive changes especially in relation to these studies. If anyone has a lead on that information (hopefully from Matthew Walker) please let me know, thanks!

    Also curious about the effects of sleeping with audio and if different types of audio affect sleeping stages in particular ways.

  19. Actually, sleep is necessary to resynchronize the mind, which is a temporal structure, with the body, which is a spatial structure. Study the Reciprocal System and prove it for yourself. www.reciprocalsystem.guru

  20. Watch this twice.

    Once for the info

    Another time to observe how well he planned this lecture. Great speaker.

  21. This did not feel like almost 55 minutes. Fantastically articulate and well structured speech. Some shocking findings in here!

  22. If the room is still occupied by the same people could Talks at Google consider not cutting of the video?

  23. My body used to sleep 5-6 hours and i am getting up automatically in specific time, what shall i do to get back as i used to sleep 7 or 8 hours

  24. Public schools that get kids up so early are guilty of child abuse and parents should withhold paying their property taxes until the abuse stops. See https://youtu.be/TGNuCCjRpGo

  25. Here's my review of Matthew Walker's book, Why We Sleep: https://www.youtube.com/playlist?list=PLGjySL94COVTSpprsxIKJAlFwz4IkRpLG

  26. Schools start too early in some areas because the working class need to get to work, so the kids aren鈥檛 learning at 7:30 they are given breakfast and it鈥檚 basically a daycare situation. And so starts a lifetime of sleep deprivation which is tragically unavoidable for many. Adequate sleep has become a luxury. That鈥檚 why homeless people are insane. They are chronically sleep deprived. When they do get a bed to sleep in, they can鈥檛 relax, they are cramped in like sardines, and they are forced out too early.

  27. I work a swing shift. 3 different shifts and we change every single week. I sleep exactly 8 hours at the exact same time relative to each shift.

  28. what a shame – the speaker mentioned evolution, which is dead and never was viable. otherwise an informative talk.

  29. Ok, but have you examinated what were the results after sleeping too much? Ten hours is worse than eight? Moreover, this speaker use numerous logical mistakes and simplifications, for example you cannot shift experiments in mice to human, or he said that it had happened within a day so imagine what would happen for a week.

  30. Memento is an amazing movie! Still not sure I can fully piece it together, even after wathing it 3 or 4 times. I don't sleep well, haven't since I was a teenager, now in my late 30s I honestly feel like my life is that movie. Just a feeling of being constantly confused, really poor executive memory, groggy when i wake up, sleepy during strange times of the day, constantly forgetful. I wonder if it's an acumulative effect of years of poor sleep. I wonder if that's one of the reasons why old people start to experience mental impairment too? You tend to sleep less and less as you age. Not sure why that is.

    On a completely unrelated note… Why did they put him behind a wall?

    Edit: Just got my answer about old people. I'm clearly a genuis! And that's despite my poor sleep. 馃榿

  31. There are so many people who have done great things and sleep only 4 hours a day and are healthier than normal. Your sample size study is v small you are not taking into consideration lifestyles tge food they eat the type of weather the people live in the culture and practices of the study group how much exercise did the subject get any underlying genetic disease etc etc. This is quite unscientific when you just make such statements without taking into consideration so many other factors.

  32. I agree with a lot he says, But are meant to be awake during daylight and sleep at night that's why we don't have night vision. People who sleep half the day use the term night owl as a lame excuse.

  33. This past year I sleep time average is less than 8 hours total per week. Often much less. Complete destruction of every asspect of life. Chin up! My mind will fail before my flesh. Diapers before death! Likely spent in prison! Good night!

  34. Working in Japanese school system.
    Students in their final year of junior highschool before going to HS, go to bed after 00:00 midnight and wake up around 5-6am.
    Have a full day of classes, then club activities until 6pm, then majority of them have cram school until 10pm. Followed by going home, doing HW, studying, and repeating it over again.

    Some days they have to wake up earlier to do morning sports club practice. Every day they do morning practice, their first 2 lessons are absolutely pointless as their motivation and energy is non-existent.

    But the school system and the stupidity of the teachers who perpetuate this is what causes this from happening.

    No wonder there is so much suicide and depression among student here.

  35. some people like me wake up automatically 2 hours after falling asleep and then have a hard time to fall back asleep until 3 hours later. That's when I get a deep sleep for an hour. I don't smoke, no tv in my room, go to bed at same time, take some sleeping natural supplements like valeriana and chamomille and glycyne and melatonine but still no matter what I wake up at 2.30 or 3 am. And then my brain cannot stop thinking for another 3 hours.

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