What happens when we sleep?

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Sleep is central to maintaining your physical and mental health, but many people don't sleep enough. We all do it, but what happens to us when we sleep?

Every night almost everyone on the planet enters into a state of unconsciousness and paralysis - but what is really happening inside the body when we drift off, and what's the impact if we don't get enough sleep?

Sleep is regulated by your circadian rhythm, or body clock located in the brain. The body clock responds to light hews ramping up production of the hormone melatonin at night, and switching it off when it senses light.

There are four stages of sleep that the body experiences in cycles throughout the night. On a good night we cycle through these stages four or five times.

Stages one and two are light sleep. This is a transition from being awake to falling asleep. Heart rate and breathing begin to slow, body temperature falls, and muscles may twitch. Stage 3 is sometimes referred to as Delta sleep - because of the slow Delta brainwaves that are released during this stage. This is the first stage of deep sleep where our cells produce the most growth hormone to service bones and muscles, allowing the body to repair itself. Stage 4 is where we begin to dream. The body creates chemicals that render it temporarily paralyzed so that we do not act out our dreams. In this stage, the brain is extremely active and our eyes, although closed, dark back and forth as if we were awake.

Humans roughly spend one third of their lives asleep. Modern lifestyles, stress and the proliferation of Technology, mean that people is sleeping far less today than they were a century ago.

Sleeping less than seven hours per day is associated with an increased risk of developing chronic conditions which could reduce life expectancy.

So for a healthier longer life get some shut-eye

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As a person who have slept many times, I can confirm that this is what happens during sleep.

yamoonallemoon
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I will always find it funny that before we fall asleep, we PRETEND to be asleep. We close our eyes, and wait… wait for our body to enter sleep mode 😂

dyl
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I think the reason why we like to go to sleep late is because our day is so busy that sleeping is like ending your free time. So we stay up as late as we can and end up not getting enough sleep.

classicmatt
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The music in this video is just fantastic.

vladislav
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I'm watching this instead of sleeping 😴

HunterHonda
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"Sleep more for a longer life"
Schools: Let's pretend we never heard that..

swoyambaskota
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I need to show this to my mom. Thank you, you guys safe my life I can peacefully go to sleep now.

alekin
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Watching this as i stayed up all night. Currently 11am. 🙃 I now understand the importance of sleep and I'll gladly fix my sleep schedule and get sleep every night.

andrew-doxj
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I've actually witnessed how dreams begin a few times. The best way I can describe it is that my brain falls in some sort of subconscious state where I'm imaging these *thoughts* or *images* (like random shapes or whatever) as if I was going through my memories and it all seems normal and natural whilst I'm falling asleep. However, I've had this process interrupted a few times where I've *snapped out of it* and instantaneously forgot what I was seeing and couldn't remember what it was in the same way as we can never remember the beginning of our dreams. I am convinced that this is how everyone's dreams formulate

ksspqf
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Prioritizing sleep is the first imperative of living well.

novelynmorillo
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Sleep is just such a beautiful, peaceful phenomenon, i just love to sleep, there's a quote i say if I have a worse day.
Sleep for now and you'll recover till morning, if you didn't, you just didn't sleep enough

havanax
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"if you don't find a way to make money while you sleep you will have to work hard until you old". Spend less, invest more

lasvegasluca
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Im 26 and have already developed heart disease because of working/gaming at night.

Don’t do it. You can’t reverse the damage.

FromFame
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As a person who is watching this while asleep, I can confirm this is accurate

alphaquinon
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I can't wait to see what the content creator comes up with next. Subscribed!

ptztipb
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Love that this video is very detailed and very interesting. Such useful information. Love how it is explained

keaton
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Extremely concise, and accurate, bumper-sticker explanation. It's bite-sized for those of us who don't have the attention span we'd like to have because didn't get enough sleep.

troy
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I love this and shared it ❤thank you so much

ryu
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I like stage 4 sleep. I find when I dream deeply I am much better refreshed in the morning.

vittoriacolona
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This was so soothing to watch and listen to. 🥰 The body is such a magical thing. Great video!

whitrobinson