A 5-day, 8-hour work week, nervous-system fatigue, and the post-meal sugar crash
You get home from work. You eat dinner. You lie down for a minute. Next thing you know, you've been out for hours.
Say, from 7 p.m. to 10 p.m.
When that happens, a little guilt creeps in.
"I fell asleep again." "I wasted my whole evening." "I wanted to work on my app." "I wanted to write an article." "Maybe I just don't have much stamina."
But it isn't necessarily plain laziness.
If you spend all day on high alert at work, your body may drop into forced recovery mode the moment you reach a place where you feel safe. And if dinner or snacks were heavy on sugar and fat, the blood sugar swings and the full-stomach feeling after eating could be making you much sleepier.
In other words, crashing after work could be the result of all of these piling up:
- Work exhaustion
- Nervous-system fatigue
- Lack of sleep
- Blood sugar swings after meals
- The load of household chores
- Not enough recovery in your life overall
A post on social media got a huge response recently. People who need a lot of sleep, or who just don't have much stamina, said they basically collapse when they get home from work. The real question behind it: for some people, isn't the standard setup of "five days a week, eight hours a day" simply too much?
I get that feeling completely.
Especially when your job isn't just "sitting for eight hours," falling asleep after you get home is pretty much what you'd expect.
Vague, undefined tasks. Pressure from coworkers. Having blame dumped on you. Meetings. Coordinating with other departments. Getting dragged into other people's efforts to avoid getting yelled at. Looking after the new hires. Chores when you get home. And on top of that, the app, the articles, the landing page, the app store submission, the bug fixes.
If you're doing all of that, sleeping for hours after dinner may just be your body reacting honestly.
Work Doesn't Stop After 8 Hours
When you hear "five days a week, eight hours a day," it looks simple:
You work 8 hours a day The other 16 are free
In reality, it isn't that simple.
A workday comes with all of this, in both time and energy:
- Getting up
- Getting ready
- The commute
- Prep before work starts
- Concentration during work
- Dealing with people
- Meetings
- Handling anger and stress
- Getting home
- Meals
- Laundry
- Bath
- Cleaning
- Preparing for tomorrow
- Sleep
- Recovery
So eight hours of work isn't an event that uses up only eight hours.
It drags the hours around it along. It wears down your nerves. It carries over into the time you need to recover once you're home.
If you live alone, nobody is waiting at home to take care of things for you.
Cooking. Washing dishes. Doing laundry. Keeping the room livable. Taking out the trash. Keeping daily life running.
You pay for all of that out of your own time and energy.
So when someone says "now study," "start a side hustle," "work on yourself" after work, your body's first reaction can be:
No, let me recover first.
Falling Asleep After Work May Be Your Nervous System Shutting Down by Force
Eating and then passing out after work can be more than ordinary sleepiness. It can look a lot like a forced nervous-system shutdown.
At work, you're on guard.
People are watching you. You can't make mistakes. Someone keeps talking to you. There are meetings. Unplanned tasks land on you. You take pressure from your boss. You have to coordinate with other departments. Responsibility for things that weren't even your fault comes raining down.
In that state, your body is tense.
Your sympathetic nervous system, the "fight or flight" side, kicks in and you get through the moment somehow.
Then you go home. You eat. You step into your room. You're back somewhere safe.
And your body drops all at once.
It's safe now. Time to recover. Shutting down.
And so you sleep from 7 to 10.
That's less a failure of willpower than a reaction that collects the nerve energy you burned through during the day.
On days when you got hit by the lousy trio of vague tasks, having blame dumped on you, and being singled out as the target, or when you were made to absorb someone else's panic about avoiding a scolding, your MP, to use gaming terms, gets drained far beyond what the actual workload would explain.
You get sleepy from nervous strain, not from the amount of work.
The Post-Meal "Crash" After a Lot of Sugar Is Also a Suspect
Still, blaming everything on stress alone is sloppy.
If you get very sleepy after eating, you should look at what you ate.
For example, some days look like this:
- A sweet bread roll
- A cream puff
- A pudding
- Squeezing whipped cream straight into your mouth
- And then a bowl of unadon (grilled eel over rice)
That is plainly a lot of sugar, fat, and total calories.
Of course, there are days when you want a meal like that. After a day that wore your nerves down, your body can crave sweet or fatty food.
Still, if you pile all of that in after getting home, it's an easy suspect for the sleepiness.
When you eat carbohydrates, your blood sugar rises. Normally insulin kicks in and brings it back down. But with a large amount of carbs, fast eating, eating a lot at once, a long gap since your last meal, lack of sleep, or stress piling on, your blood sugar swings tend to get bigger after meals.
This is what people loosely call a blood sugar spike.
The e-Health Net site run by Japan's Ministry of Health, Labour and Welfare explains that everyone's blood sugar rises temporarily after a meal, but insulin is normally released and it returns to normal within about two hours. Blood sugar that is still high after the two-hour mark is called postprandial hyperglycemia.
The Japan Diabetes Society's "Healthy Eating Start Book" explains that carbohydrates raise blood sugar and dietary fiber helps hold that rise back. And e-Health Net's information on diet for diabetes also recommends avoiding eating a lot at once and eating slowly.
So this route is entirely plausible:
Work wore your nerves down You ate a sugar- and fat-heavy meal after getting home Your blood sugar swung hard Feeling full and safe, your tension let go Sleepiness hit all at once
This isn't a simple "carbs are bad" story.
Carbohydrates are needed as an energy source. What matters is the amount, the timing, how you eat them, what you eat them with, and how tired you were that day.
If you tend to crash after getting home, it's worth checking a few things:
- Is dinner mostly white rice, noodles, bread, and sweets?
- Are you going from hungry to wolfing it down?
- Are you eating too fast?
- Is there too little vegetable, protein, or soup?
- Are you lying down right after eating?
- Are you especially sleepy on days when you're short on sleep or very stressed?
Look at this as your body's reaction, not as a matter of willpower.
Stress Fatigue and a Sugar Spike Hit Hard When They Combine
There's often more than one reason you sleep after getting home.
In real life, several causes usually stack up.
Here's what that can look like:
- Work wears down your nerves
- You get home with your HP, as in a game health bar, nearly at zero
- You're hungry
- You eat sweets and carbs all at once
- Your blood sugar swings hard
- You reach a safe place and the tension drops
- Your body shuts itself down
That's quite natural.
So what's behind falling asleep after work may be combined damage from:
Nervous-system fatigue × lack of sleep × a sugar spike × the cost of daily life
Dismissing this as "laziness" is a very low-resolution way of looking at it.
Society Is Built Around People With Lots of Stamina
Another reaction that came up a lot on social media was:
Isn't the 8-hour workday designed for people with plenty of stamina?
That's an important point.
The time people need to recover differs from person to person.
Some people can still move after the same 8 hours of work. Some people can't do anything once they're home. Some people fall asleep right after eating. Some people only recover by sleeping in on their days off.
Stamina, how much sleep you need, how sensitive your nervous system is, how long your commute is, your workplace, your household workload, the stress of relationships. All of these vary enormously between people.
And yet society often says:
Everyone works Study after work Start a side hustle Keep improving yourself Do your chores properly too Take care of your health too Value your relationships too
Look at my remaining HP, please.
Maybe someone with a lot of stamina can do it. But for people with low stamina, people who need long sleep, or people whose nerves get taxed easily, they're already close to zero HP after work.
Telling them they're "not trying hard enough" in that state is pretty harsh.
A Nagging Thought: Was the 8-Hour Day Built on Someone Else Doing the Housework?
Among the replies on social media, some pointed out that the 8-hour workday seems to assume someone else is handling the housework.
That's a sharp observation.
In the old standard way of working, there was often an unspoken division like this:
- The person who works at the company
- The person who handles the household
- The person responsible for keeping life at home running
- The person who handles the meals, laundry, and cleaning
Of course, the reality differed by household and by era. But at least the assumption that the working person could focus on work alone was very strong.
Today is different.
If you live alone, work and housework are both on you. In a dual-income household, work, housework, and childcare are shared. Some people care for aging parents or handle family matters. Some are even expected to do side jobs, study, or prepare for a career change.
In short, the cost of life outside work is quite heavy.
And yet "five days, eight hours" remains the standard for how we work.
That's where it strains.
People who get home from work and collapse aren't being lazy. They may be carrying both work and life alone, and their recovery time has ended up in deficit.
Japan's Health Ministry Sleep Guide Also Stresses Sleep and Feeling Rested
The Ministry of Health, Labour and Welfare's "Sleep Guide 2023 for Health Promotion" says that for adults, not only the length of sleep but also the feeling of being rested after sleep matters.
Lack of sleep and a low sense of being rested also affect physical and mental health and how you function during the day.
So it isn't just "how many hours did you sleep." You need to look at:
Do you feel recovered after sleeping? Can you function during the day? Is fatigue lingering? Is it getting in the way of daily life?
Sleeping for a few hours after getting home isn't automatically bad. It may be recovery your body needs.
That said, if you have strong sleepiness almost every day, you don't feel better after sleeping, it interferes with your days, you snore or have trouble breathing, you feel deeply low, or you can't get up in the morning for a long stretch, a sleep disorder, a mental health problem, or a physical illness could be hiding behind it.
In that case, don't try to power through. Keep seeing a doctor or a consultation service as an option.
What I'm saying here is not:
People who fall asleep are lazy
but:
People who fall asleep may be so short on recovery time that they crash
It's Absurd That I Was Also Fixing Apps During a Busy May
Let me use my own case.
May was very busy at work. On the company side, I had undefined tasks, dealing with my boss, meetings, blame getting dumped on me, looking after a new hire, and the regular daily work.
And yet I was also running my apps at the same time.
- Fixing the app
- Handling app store review
- Adjusting the store text
- Improving the landing page
- SEO articles (writing to get found on search engines)
- ASO (optimizing how the app appears in the app store)
- Everything around AdSense (Google's ad program)
- Feeding tasks to Codex (an AI coding tool)
- Fixing bugs
- Mass-producing article files in Markdown
- Preparing app releases
Honestly, that's a lot.
If you only look at "I got home and fell asleep," it might look like slacking.
But look at the whole month and it's different.
I was patching holes at the company and still watering my own app garden.
That's a heavy load.
So even if I ate dinner and slept for hours after getting home, I wasn't just slacking off.
My body may simply have been saying:
You've been running all May, you know. I'm taking you down for a bit.
"Start a Side Hustle After Work" Ignores Recovery Time
People often tell you to study after work, start a side hustle, invest in yourself.
That isn't wrong in itself.
Building assets outside your job matters. A side job, apps, articles, testing an investment strategy, preparing for a career change can all lead to future freedom.
But there's a precondition:
You have to have enough room left to recover
Without that, a side hustle after work is rough.
If your HP is at 0 when you get home, a side hustle isn't happening. You eat and sleep, and that's the day. Taking a bath is already impressive. If you brushed your teeth and made it to bed, you won.
Telling someone in that state:
Don't be so soft Everyone does it You make time for what matters Do one hour before bed
is pretty harsh.
It may not be weak willpower. The day's work and the cost of living may already have put your recovery time in the red.
Plan for Falling Asleep Instead of Fighting It With Willpower
There's no need to blame yourself for sleeping after you get home.
That said, if it happens every single time, your daily setup needs a small change.
What matters is not:
Gritting your teeth to avoid falling asleep
It's:
Assuming you'll fall asleep, and designing for a minimum of recovery and a minimum of building something for yourself
1. Don't schedule heavy work right after you get home
Put recovery first right after you walk in.
Drink some water. Eat. Take a shower. Dim the room. Lie down once.
2. Make dinner in a form that's less likely to knock you out
You don't have to cut carbs completely.
But on days when you tend to crash, it's worth trying things like:
- Don't eat too many sweets at once
- Start with soup or protein
- Add vegetables or fiber
- Don't stack sweet rolls, pudding, and cream puffs on top of a full rice meal like unadon
- Before lying down after the meal, do a little tidying or take a short walk
- Eat a bit more slowly instead of wolfing it down
This isn't a strict diet. It's an adjustment to protect your evening MP.
3. Set up just a three-tap capture first
If heavy work is out of reach, leave one line by voice input.
Something that bugged me today An article title Something I want to fix in the app What to do tomorrow
Even that much turns into something you can build on the next day.
4. Finish the smallest task before the sleepiness hits
For example:
- Leave a note on GitHub
- Send one task to Codex
- Fix one line of store text
- Just check the screenshots
- Just come up with an article title
That's enough.
5. Count falling asleep as recovery
Don't treat it as a failure.
My body recovered I got back the MP that the blame-game meeting drained I made sure I can move again tomorrow
Treat it like that.
6. Use days off for the side where you build your own assets
If your nerves are truly worn down, taking a paid day off to get away is a fine option.
On that day, don't patch holes at the company. Water your own apps, articles, and landing pages.
This isn't running away. It's recovering your MP and reinvesting it.
Collapsing After Work Is Also a Problem With the Water Quality of Society
If many people collapse after getting home, blaming only the individual is wrong.
Of course, looking after your own health matters. Sleep habits, diet, exercise, baths, phone time, and how you handle stress all play a part.
But that isn't all.
You also have to look at the "water quality" on society's side.
- Five days, eight hours is the standard
- There's a commute
- There's housework
- If you live alone, you also carry all of daily upkeep yourself
- You're expected to improve yourself after work, too
- Relationship stress at work is heavy
- Resting feels guilty
- Differences in stamina between people are brushed off
Ignoring all of this and saying:
Going home and sleeping is sloppy
means not checking the water.
When a lot of fish die, you check the water, not just the fish. If a lot of people collapse after getting home, you should look at the water quality of how we work, not just at the people.
Summary: Falling Asleep May Be a Log Your Body Is Writing
You get home from work. You eat. You sleep for hours.
That isn't necessarily just laziness.
The nerves you used up during the day. Stress at work. The cost of daily life. Housework. The commute. Living alone. A side hustle or app development after work. A dinner heavy in sugar and fat. After carrying all of that, your body may be demanding recovery.
Five days, eight hours treats the cost of life outside work too lightly.
If someone collapses after getting home, wrapping it up with
They have no stamina They're being soft They're sloppy
is sloppy thinking.
Look at the differences in stamina between people. Look at the load of daily life. Look at stress. Look at sleep and the feeling of being rested. Look at blood sugar swings after meals. Look at the water quality of how we work.
Then do what you can on your own side too.
Don't pile heavy work onto your time after getting home. Don't stack too much sugar at once. Set up just a three-tap capture. Count falling asleep as recovery. Take a day off when you're truly worn down. Put your MP back into your own apps, articles, and landing pages.
You don't have to blame yourself for falling asleep.
Your body is telling you your limits, clearly.
And if, after you've slept and recovered, you manage to water your own garden a little again, that is simply a win.
