[Ted Vietsub] Ngủ bao nhiêu tiếng 1 ngày là tốt cho sức khỏe của bạn ?

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in 1965 17-year old high-school student
Randy garner stayed awake for 264 hours
that’s 11 days to see how he’d cope
without sleep
on the second day his eyes stopped
focusing next he lost the ability to
identify objects by touch by day 3
Garner was Moody and uncoordinated at
the end of the experiment he was
struggling to concentrate had trouble
with short-term memory became paranoid
and started hallucinating
although garner recovered without
long-term psychological or physical
damage for others losing shut-eye can
result in hormonal imbalance illness and
in extreme cases death we’re only
beginning to understand why we sleep to
begin with but we do know it’s essential
adults need seven to eight hours of
sleep a night and adolescents need about
ten we grow sleepy due to signals from
our body telling our brain we are tired
and signals from the environment telling
us it’s dark outside the rise in sleep
inducing chemicals like adenosine and
melatonin send us into a light doze that
grows deeper making our breathing and
heart rate slowed down and our muscles
relaxed this non REM sleep is when DNA
is repaired and our bodies replenish
themselves for the day ahead in the
United States it’s estimated that 30% of
adults and 66% of adolescents are
regularly sleep-deprived this isn’t just
a minor inconvenience staying awake can
cause serious bodily harm when we lose
sleep learning memory mood and reaction
time are affected sleeplessness may also
cause inflammation hallucinations high
blood pressure and it’s even been linked
to diabetes and obesity in 2014 a
devoted soccer fan died after staying
awake for 48 hours to watch the World
Cup while his untimely death was due to
a stroke
studies show that chronically sleeping
fewer than 6 hours at night
increases stroke risk by four and a half
times compared to those getting a
consistent seven to eight hours of
shut-eye for a handful of people on the
planet who carry a rare inherited
genetic mutation sleeplessness is a
daily reality this condition known as
fatal familial insomnia places the body
in a nightmarish state of wakefulness
forbidding it from entering the
sanctuary of sleep within months or
years this progressively worsening
condition leads to dementia and death
how can sleep deprivation cause such
immense suffering scientists think the
answer lies with the accumulation of
waste products in the brain during our
waking hours our cells are busy using on
our days energy sources which get broken
down into various byproducts including
adenosine as adenosine builds up it
increases the urge to sleep also known
as sleep pressure in fact caffeine works
by blocking adenosine receptor pathways
other waste products also build up in
the brain and if they’re not cleared
away they collectively overload the
brain and are thought to lead to the
many negative symptoms of sleep
deprivation so what’s happening in our
brain when we sleep to prevent this
scientists found something called the
glymphatic system a clean up mechanism
that removes this buildup and is much
more active when we’re asleep it works
by using cerebrospinal fluid to flush
away toxic byproducts that accumulate
between cells lymphatic vessels which
serve as pathways for immune cells have
recently been discovered in the brain
and they may also play a role in
clearing out the brains daily waste
while scientists continue exploring the
restorative mechanisms behind sleep we
can be sure that slipping into slumber
is a necessity if we want to maintain
our health and our sanity

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