Cold plunging, a practice with historical roots and modern popularity, leverages controlled stress (hormesis) to trigger beneficial physiological adaptations, primarily by training the nervous system and enhancing metabolic efficiency, rather than being a magical cure-all.
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Hey everyone, welcome back
Cold plunges
These days it really feels like
you see them everywhere
What, 5 a.m. in the morning
standing next to a bucket
of water that's almost freezing
Like the colder the better
The more painful, the more effective
Have you guys also heard about
cold plunges
Some people
believe that
they can help them
burn fat
make their willpower stronger
and
boost their immunity
Some even say
it can extend lifespan
Cold plunges
Right now in
the longevity circle
and the health circle
their volume
is getting bigger and bigger
More and more people
are willing to try it
But the question is
Is it really that magical?
So let's sit down
and properly discuss this issue
Exactly
does cold plunging
actually give the body
real, tangible effects
or is it possibly just
beautifully packaged
Usually when I make these videos
I spend
a lot of time looking up information
and many hours
reading
research papers
and then
finally condense it into
a short roughly ten-minute video
so it's easier for you to absorb
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Let's first take a look
Actually cold plunging
isn't something new
It's basically
taking old things out again
As early as ancient Greece
they already used all kinds of
cold water bathing
or soaking
The famous Greek philosopher
Hippocrates
actually long ago
used cold therapy
to treat his patients
for fevers, swelling, joint problems
Actually
as early as ancient Greece
it already started being used
Later
it slowly became more
mainstream
especially around the year 2000
endurance athletes
for example marathon runners
and cyclists
in between consecutive races
they relied on
ice baths
to recover quickly
Among the most famous
should be Michael Phelps
During that Olympics
he probably
had several races in one day
he relied on
this
to recover quickly
But in 2010
it truly blew up
It should have started from
this person Wim Hof
who brought cold therapy
to the whole world
This person
I think is quite worth
talking about
The first question I want to ask about him is
his 10 toes
are they still there?
He's an extreme athlete
He once
climbed a mountain
wearing just shorts
and on the mountain
and he broke
multiple records
which is
his whole body
immersed in
ice-cold water
in a bathtub
for as long as 1 hour 52 minutes 42 seconds
He even claims
that his own body
can control
the response to cold
So some of his statements
make people feel
wait a second and think again
is what he says actually true?
But behind cold therapy
there actually is
a scientific concept
Just like
one very famous example
is
when you're fasting
your body is
introduced to something called
If there's no hunger
your body
will keep accumulating waste
And this is also
one of the most important drivers
of our aging
This concept
is actually called hormesis
It means that
short-term
controlled stress
can trigger long-term
beneficial adaptive responses
But the key point is
short-term
and controllable
If it's too much
or too long
it becomes
chronic stress
Exercise is hormesis
Fasting is hormesis
Cold plunge
cold therapy
is also hormesis
So when you do cold therapy
what happens
Actually
your body enters a
switch mode
Your nervous system
activates immediately
blood vessels constrict
then heart rate
starts to change rhythm
The brain directly enters
survival priority mode
and your body
only does one thing
which is
allocate resources
just to
help you survive
The goal is very simple
But the key point is
what really changes you
isn't just one cold exposure
but you have to
repeatedly
be exposed to cold
because only when
the body repeatedly receives this stimulus
will your nervous system
learn one thing
which is
I can actually get through this
Its real purpose
is to train your stress hormones
not to suddenly
spike massively
Mitochondria
become more efficient
Your body system
will overall
become calmer
and handle things in a more orderly way
when facing stress
This is the result you really want
If you keep being exposed continuously
actually your body
will adapt
So
it won't be like
the first time, so painful
In the end
the state you want is
it feels a bit uncomfortable
but
it's acceptable
Actually many people after doing it
their reaction is
they really feel like their mind becomes clearer
like the whole body is awakened
This is not an illusion
because studies found
when you do cold therapy
it can make your norepinephrine
rise by 530%
This
will make you feel
more awake
more alert
and stronger focus
At the same time
your dopamine
will also rise
by 250%
directly affecting your mood
bringing you
a sense of satisfaction and pleasure
This is why
many people like cold therapy
because after doing it
they feel
their mood for the whole day becomes better
and
their energy improves
And unlike caffeine
the feeling it gives you
this one
can give you
sustained
3 to 6 hours of pleasure
This is why
many enthusiasts say
it feels like
riding a high
and then being able to carry through
the entire workday
Besides it can
bring you pleasure
it actually has other effects
This is related to your fat
Your body
actually has two kinds of fat
white fat
which is the energy storage kind
the one you want to lose
And the other kind
is called brown fat
it's actually like a
furnace
Why is it called brown fat
because under the microscope
it looks brown
and it's packed full of mitochondria
Brown fat has a secret weapon
called UCP-1
When you are exposed to cold
this UCP-1 gets turned on
like flipping a switch
and tells your body
now is not the time to store energy
burn it quickly
Once activated
your body starts
massively burning
glucose
and fatty acids
just for one thing
which is
to prevent you from freezing to death
Actually from the body's perspective
it's actually raising your
metabolism
upgrading it
Over the long term
even if you're just sitting there
sitting at your desk
completely still
your body's burning ability
metabolic ability
will naturally get better
meaning the body
becomes better at consuming energy
There was one study she did
they found that
if brown fat activity
then their BMR is higher
In other words
even when they do nothing
at rest
without exercising
they can silently
burn more calories
And studies confirm
regular cold water immersion
can improve your insulin
sensitivity
by up to 43%
Why?
Because cold water immersion
can give your blood sugar
something to do
It's not just
floating around in your blood
It can actually
be taken up and used by cells
And of course mitochondrial efficiency
also improves along with it
But interestingly
body weight
doesn't change
but
your metabolism gets better
Now that we've reached here
you might ask
so should we now
just jump into
an ice-cold bathtub?
My answer is
not necessarily
Not just because it's trending now
so it means
you have to follow
but rather
first understand the science behind it
why
it helps you
and you need to understand
who it's suitable for
whether it's suitable to put in your life
What we're really most concerned about is actually
its temperature
and how long
No matter which method
whether cold shower
or full ice bath
it doesn't mean it has to be very cold
to be most effective
No need for ice cubes
even just a cold shower
can be effective
because
as long as it can
trigger your body's adaptive response
but not so cold that
you feel unsafe
So at the beginning
you don't have to jump into ice right away
Cold shower
is the best entry level
because you can expose large areas of the body to cold water
and also
immediately activate your nervous system
Even without freezing
for many people
this is enough
to stimulate their metabolism
and improve their nervous system
So cold shower
is a very good beginner version
It means
letting your body slowly
build up tolerance
Usually in studies
they prefer to use ice baths
or
direct cold water
in a tub
because they can control the temperature
So why do studies
prefer this method
The key is not that
it has to be very icy water
but rather after you go in
or during your cold shower
in the first 30 seconds to 60 seconds
do you immediately feel uncomfortable
You need to clearly feel uncomfortable
but you don't need to suffer
The goal is in the cold
can you stay calm
and
can you control your breathing
and let the body slowly adapt
But if the water is too cold
you panic right away
and can't breathe
then that means
your water
is really too cold
Simply put
choose one
method that you can repeat
keep using
repeated consistent cold showers
their benefits will be greater than
you only being able to endure one time
and never wanting to do it again
This applies to almost everything
So the question is
Is everyone suitable to do it?
or are there some people
who will particularly benefit from cold showers
The first group is what I just mentioned
The second group
because when you give your body
moderate low-level stress
it's equivalent to bringing your nervous system
back down
can reduce
your body's baseline reactivity
The third group
those who have been living
in a greenhouse for a long time
the group that's living too comfortably
Modern life
makes us live too well
eating full
and low activity
If there's cold shower
it's like giving your body a shock
forcing
your metabolism
to restart operation
The last group of course is
athletes
Finally I want to say
cold therapy is not a
cure-all
If today
your metabolism is already good
sleep is good
and
stress is low
usual activity level
is also decent
then the effect you see
actually won't be very big
Of course
like any exercise
these things definitely
still have their risks
So if today you're really
very interested
I think you should
do some proper homework
And I think cold showers
are the best entry method
this is something I can more accept
As long as I'm in ice water
I feel I can't handle it
But if you say
cold shower
you just
after finishing washing
the last 3 to 5 minutes
turn it to cold water
this is something I can accept
And the water doesn't need to be bone-chilling
Water temperature just needs to reach
uncomfortable
that's enough
If you can't
do 3 to 5 minutes
at the beginning 30 seconds
is also fine
Modern people
life is too comfortable
our bodies
just need to be given
a little low-level stress
to let the body's functions
restart
This is its basic concept
Okay, that's all I have today
See you next time
bye bye
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