THE SLEEP-TRACKER WATCH
Despite my advocacy of waking up at the same time every morning, it has a flaw.
A normal alarm cannot tell where you are in a sleep cycle.
Your brain cycles through the different stages of sleep,
oscillating between Deep sleep,
and light/REM sleep at a period of about 90 minutes.
Deep sleep is very important for cognitive performance.
A lot of “neural housecleaning” occurs during deep sleep,
which makes it so important for mood,
performance,
motor skills,
productivity,
and
creativity.
Deep sleep has specifically been evolutionarily programmed to not be interrupted.
Some researchers suspect that one of the main reasons light sleep evolved was to act as a transition stage to and from deep sleep and to provide opportunities for awakening.
During deep sleep your cerebral cortex – the consciousness part of your brain – nearly shuts off.
Neural activity in the cerebral cortex break down into little islands that can't talk to one another.
This is why we feel groggy when we’re woken up from deep sleep.
Our cerebral cortex (i.e. our consciousness) is turned off!
It takes 20 min of waking activity for it to reboot itself.
There are thought to be health consequences too,
since you’re not giving your brain the opportunity to finish what it started.
A cool sleep hacker tool is the Honor band 4 ( SleepTracker watch ).
You wear it at night like any watch,
but it can detect where you are in a sleep cycle.
In light stages your body tosses and turns a bit,
although we never know it.
In REM our bodies are paralyzed and in deep sleep our muscles are relaxed and motionless.
The SleepTracker watch can detect movement from light stages,
so it always knows when you’re in a light stage and when you’re in a non-light stage.
Its alarm only goes off during light stages.
You wake up feeling refreshed and energetic.
Much to my surprise,
it actually works…
But I’ve heard that if we just sleep in 90 min intervals we will always wake up at the right time…
Err….
That’s a toughie.
There’s been a lot of buzz about sleeping in 90 minute intervals.
Some people claim that this guarantees we wake up at the end of a sleep cycle (which are on average 90 minutes long).
The real situation is much more complicated, unfortunately.
Sleep stage architecture is highly variable.
Drink a bit of alcohol before you sleep and you’re unlikely to see any evidence of 90-minute cycles.
And even as we age our sleep architecture becomes more broken.
The pure 90-minute cycle thing is more of a textbook example,
a simplified model that loses applicability in real-world situations.
Have Mastery Remove Mystery
A normal alarm cannot tell where you are in a sleep cycle.
Your brain cycles through the different stages of sleep,
oscillating between Deep sleep,
and light/REM sleep at a period of about 90 minutes.
Deep sleep is very important for cognitive performance.
A lot of “neural housecleaning” occurs during deep sleep,
which makes it so important for mood,
performance,
motor skills,
productivity,
and
creativity.
Deep sleep has specifically been evolutionarily programmed to not be interrupted.
Some researchers suspect that one of the main reasons light sleep evolved was to act as a transition stage to and from deep sleep and to provide opportunities for awakening.
During deep sleep your cerebral cortex – the consciousness part of your brain – nearly shuts off.
Neural activity in the cerebral cortex break down into little islands that can't talk to one another.
This is why we feel groggy when we’re woken up from deep sleep.
Our cerebral cortex (i.e. our consciousness) is turned off!
It takes 20 min of waking activity for it to reboot itself.
There are thought to be health consequences too,
since you’re not giving your brain the opportunity to finish what it started.
A cool sleep hacker tool is the Honor band 4 ( SleepTracker watch ).
You wear it at night like any watch,
but it can detect where you are in a sleep cycle.
In light stages your body tosses and turns a bit,
although we never know it.
In REM our bodies are paralyzed and in deep sleep our muscles are relaxed and motionless.
The SleepTracker watch can detect movement from light stages,
so it always knows when you’re in a light stage and when you’re in a non-light stage.
Its alarm only goes off during light stages.
You wake up feeling refreshed and energetic.
Much to my surprise,
it actually works…
But I’ve heard that if we just sleep in 90 min intervals we will always wake up at the right time…
Err….
That’s a toughie.
There’s been a lot of buzz about sleeping in 90 minute intervals.
Some people claim that this guarantees we wake up at the end of a sleep cycle (which are on average 90 minutes long).
The real situation is much more complicated, unfortunately.
Sleep stage architecture is highly variable.
Drink a bit of alcohol before you sleep and you’re unlikely to see any evidence of 90-minute cycles.
And even as we age our sleep architecture becomes more broken.
The pure 90-minute cycle thing is more of a textbook example,
a simplified model that loses applicability in real-world situations.
Have Mastery Remove Mystery
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