"My body is breaking down even though I'm not tired" — What happens during computer work
Before I know it, my neck and shoulders are stiff as a board.
My arms are locked up, and even my breathing is shallow.
But while I'm working, I don't notice any of that for a while.
It happens whether I'm making thumbnails, editing videos, or proofreading text.
I don't feel "tired!" like I would after climbing a mountain, but my body is breaking down nonetheless.
This time, instead of dismissing this phenomenon as just "being too focused" or "having bad posture,"
I will break down why "unnoticed fatigue" occursby looking at the division of labor between the brain and the body.
It's not that you aren't tired; it's that "the fatigue hasn't reached your consciousness."
What is happening in this state is not that the fatigue doesn't exist.
The fatigue is there.
However, it is not adopted as the sensation of being "tired" and does not surface in your consciousness.
A brain that is focused does not treat all information equally.
It allocates bandwidth to information it deems necessary right now,
and puts everything else on the back burner.
Especially during computer work,
visual information (screen, colors, layout, movement)
judgment (which is better, which is correct)
fine-tuning (adjusting by 1px, just a little more)
These types of processes tend to run at high density.
As a result, signals from the body such as shallow breathing, muscle tension, and poor posture are
deprioritized as "information not needed right now."
Rather than being ignored, it is closer to
being dropped during the editing phase.
Why we "don't notice": Body signals are weak, slow, and localized
Fatigue from climbing a mountain forces you to notice it.
Your heart rate goes up
Your breathing becomes irregular
Your legs feel heavy
You can't continue without resting
Fatigue signals are strong, spreading throughout the body and forcing a decision.
On the other hand, fatigue from computer work has a different nature.
Posture is fixed
Muscles remain tense for a long time with "weak force"
Fatigue accumulates locally (neck, shoulders, forearms, lower back)
Moreover, it progresses slowly
In other words, it is
local × sustained × low-noise fatigue.
This type has low "urgency" for the brain.
Therefore, it is rarely adopted as a reason to stop working.
As a result,
it can be continued under the impression that "I am not tired."
What stiffens the body: continuing to support it even though it is not moving.
During focused work, the body usually ends up like this.
Head moves forward (leaning forward)
Shoulder girdle is fixed (shoulders rise/shrug)
Forearms stiffen for fine hand operations
Pelvis tilts backward or bears weight on one side
The trouble with this state is that
even though you are not moving, you are exerting force.
Originally, the body recovers through a cycle of
"move → relax → move"
as a cycle.
But when you are focused,
you don't move (recovery does not occur)
but the tension does not release (fatigue accumulates)
Furthermore, you don't notice (the brakes don't engage)
Stiffness doesn't just happen because of "bad posture," it happens because
the cycle of recovery is broken.
There are "tasks that make it easy to leave your body behind"
This is important;
not all computer work is the same.
It is more explanatory to look at tasks based on
how the brain functions.
Tasks that make it easy to strongly leave your body behind (deep immersion)
Image editing/thumbnail production (refining subtle differences in color, placement, and balance)
Video editing cut refinement (fine-tuning the timeline)
UI design (continuously refining the alignment of appearance and meaning)
Programming while implementing logic (sinking into an abstract world)
The common points are:
There is no single correct answer
Making continuous judgments on subtle differences
Feedback is immediate, there is no stopping point, and it is completed entirely within the screen
Deep logical construction where you are building a massive castle of logic in your brain, and because breaking it once means starting over, you completely shut out the outside world
With this type, your consciousness tends to stick to the screen, and
your body is removed from the top priority.
Tasks where the body quietly disappears (reaching your limit before you notice)
Text proofreading/editing (continuously casting a net of attention)
Data checking (sustained error detection)
Subtitle checking/long-duration reading (monotonous but concentration is sustained)
Because the stimulation is weak, fatigue progresses quietly.
That is why you notice it late.
Tasks where the body remains relatively active (where consciousness is easily dispersed)
Rough brainstorming and decision-making (not refining details)
Handwritten structural notes (involving strokes that move the entire arm)
Organizing materials and sorting folders
Simple data entry and copy-paste tasks (creating a rhythm)
Transcribing audio files (using "auditory sense")
When the density of judgment is low, body signals are not completely cut off.
"Intense concentration" is a capability, but it has side effects.
To summarize what has been discussed so far,
Concentration is the ability to focus bandwidth on important processing.
At that time, body signals are easily deprioritized.
Fatigue from computer work is "localized x sustained x low noise," so it is hard to notice.
If you continue to hold a fixed posture without noticing, stiffness becomes inevitable.
Therefore, this is not simply "bad concentration."
It is also a side effect that occurs as a result of concentration working too well.as well.
The problem is,
that it continues unconsciously, without limits, and without switching.
The question that remains here
After saying all this, I don't want to end it with "So, let's do some stretching."
The next thing we should ask is probably something like this.
Is it necessary to fully restore bodily sensations?
Or, is it possible to design a system that only allows the minimum necessary signals to pass through?
What is needed to restore the cycle of recovery without breaking concentration?
Before "resting," there is the issue of
how to design the relationship between concentration and the body.