Working Yourself Sick: The Arithmetic Nobody Does

Every Kenyan professional knows someone who worked relentlessly for twenty years and then spent the last five in and out of hospital. The work stress health arithmetic is simple, and almost nobody does it: if the health cost of the last five years of overwork exceeds the money earned in them, the work was a bad investment.

This is not an argument against ambition. It is an argument against doing the arithmetic badly. Most people price their time at their salary and treat health as free. It is not free. It has a running cost, and overwork draws it down. Understanding work stress health means putting a number on that cost.

This article explains what chronic work stress does physiologically — genuinely, not metaphorically — and then lays out the arithmetic in a way you can apply to your own month.

Key points

- Chronic stress keeps cortisol and adrenaline elevated, and cortisol raises blood glucose by signalling the liver to release stored glucose.

- Chronic stress is also associated with disrupted sleep, and disrupted sleep is associated with reduced insulin sensitivity.

- The work stress health cost is paid in money, time and quality of life, usually years after the work is done.

- The arithmetic is: earnings over the period, minus the health cost of that period. Most people never compute the second number.

- This is not about quitting your job. It is about pricing your health honestly and protecting the two levers that matter most — sleep and movement.

What chronic stress actually does to your body

Stress is not a feeling. It is a hormonal state, and the hormones involved have measurable metabolic effects.

When you are under pressure, your body releases adrenaline and cortisol. This is the same system that wakes you up in the morning and gets you through a difficult afternoon. It is not a design flaw. It becomes a problem when the signal never switches off.

Here is the chain, in plain language.

| What happens | What it does to your body | Why it matters | |---|---|---| | Chronic work stress | Keeps cortisol and adrenaline elevated | The "danger" signal never resets | | Elevated cortisol | Signals the liver to release stored glucose | Blood glucose rises even without eating | | Elevated adrenaline | Raises heart rate and blood pressure | Extra load on the cardiovascular system | | Stress-driven poor sleep | Reduces sleep duration and quality | Sleep loss is associated with reduced insulin sensitivity | | Reduced insulin sensitivity | Cells respond less well to insulin | The body has to produce more insulin for the same job | | The combination | Higher glucose, more insulin, more appetite | The metabolic picture drifts in the wrong direction |

Note that none of this requires you to eat badly. Chronic stress alone shifts the hormonal environment in a direction that is unhelpful for blood sugar. Add poor sleep and skipped meals, which usually accompany overwork, and the effect compounds.

We cover the cortisol pathway in more detail in our article on how poor sleep raises cortisol and in our piece on cortisol and blood sugar.

The arithmetic, done properly

Most people compare two things: the salary and the alternative. There is no alternative on the table, so the salary wins by default. The comparison is wrong because it leaves out the second column. The work stress health calculation is what most people skip.

Here is the honest version.

  1. Earnings over the period. Total income from the role over, say, ten years.
  2. Health cost over the same period. Direct costs — consultations, medication, investigations, admissions. Plus indirect costs: leave taken, income lost, and the cost of care borne by family.
  3. Quality-of-life cost. The years of reduced function, the sleep you did not get, the family events missed. Harder to price, entirely real.
  4. The deferred bill. Many of the costs of overwork arrive in the decade after the work, when earning capacity may already be lower.

Subtract 2, 3 and 4 from 1. The difference is what the job was actually worth. For some people the number is still very positive, and the job was a good decision. For others, it is closer to zero than they expected.

Two worked comparisons:

  • Person A earns well for fifteen years, sleeps six hours, never moves, drinks coffee instead of lunch, feels fine, and discovers a metabolic problem at fifty-two. The medical costs arrive after the earnings have already been spent.
  • Person B earns the same, sleeps seven to eight hours, walks after dinner, takes leave properly, and reaches fifty-two with no diagnosis. Same earning, better arithmetic.

The difference between them is not willpower. It is whether the second column was ever calculated.

Why "I will rest when I make it" does not work

The plan most Kenyan professionals are running is: work hard now, rest later.

The problem with that plan is physiological. Rest is not a state you can bank. Recovery is a process, and it needs to run continuously. Sleep debt is not repaid by one long weekend. Cardiovascular and metabolic load accumulated over a decade does not reset with a holiday.

There is a second problem. The habits that make overwork possible — poor sleep, no movement, irregular eating, constant low-grade stress — are the same habits that become permanent. By the time you "make it", you are not resting. You are managing the consequences.

The fix is not dramatic. It is to protect two levers now, while the work is still happening. Both are central to work stress health.

Lever 1: Protect your sleep

Sleep is the highest-yield lever available to a person with a demanding job, and it is the one most willingly sacrificed.

What helps, in practical Kenyan terms:

  • Fix a wake time and let bedtime follow, rather than the other way round.
  • Set a hard stop for work screens 45 minutes before bed. The emails will still be there.
  • Stop caffeine after early afternoon. Caffeine's half-life is long enough that an evening cup can still be active at bedtime.
  • Make the room dark and cool. A curtain and a working fan do more than any supplement.
  • Do not use alcohol as a sleep aid. It shortens time to sleep and reduces sleep quality.

Read more: Sleep and Blood Sugar: The Hormone Link.

Lever 2: Protect your movement

The second lever is movement, and it does not need a gym. A 15 to 20 minute walk after dinner, five days a week, is genuinely enough to change the arithmetic.

We have written the full case for this in Walking After Meals: The Simplest Blood Sugar Tool. The short version: it is free, it counters the sitting, and it helps your muscles clear glucose at the moment your body is dealing with the most.

Where this fits. If long working days leave you reaching for a third sugary tea, some people prefer a sugar-free option such as Black Coffee Mixture with Ganoderma. It replaces a sweetened drink; it does not replace sleep or walking, and it makes no health claim.

Boundaries that protect the arithmetic

You do not need to become a different person. You need a small number of boundaries that survive contact with a real workload.

  • One hard stop time, most days, and a reason to keep it.
  • Lunch away from the desk at least three days a week, even if it is 20 minutes.
  • Leave taken, not accrued. Leave that is never used is not a benefit.
  • A weekly check-in with yourself: sleep hours, movement, and whether you are eating at reasonable times.
  • A named person who notices when you are not okay.
  • A check-up on a schedule, not only when something hurts.

If work stress is accompanied by persistent low mood, anxiety, or thoughts of self-harm, that is a medical matter and it deserves professional help. Do not wait for a holiday to fix it.

The client meeting that cost more than it earned

A Nairobi-based consultant took on a project with a demanding schedule — five months of 6 a.m. starts, client calls until 10 p.m., and weekends largely consumed. The project fee was decent. He delivered it well.

In the year after, he made three separate visits for investigations relating to symptoms that had started during the project: disrupted sleep, afternoon fatigue, and a fasting glucose result that had crept upward. Nothing catastrophic. But the total cost — consultations, tests, medication, and the reduced work capacity in that following year — came close to a fifth of what the project had paid.

He still took the next project. He simply started protecting sleep first and stopped treating rest as something owed to him later. That change cost nothing and changed the arithmetic.

Frequently asked questions: Work stress health: the arithmetic in one paragraph

Can work stress really raise blood sugar?

Yes. Cortisol signals the liver to release stored glucose, so blood glucose can rise even when you have not eaten. Chronic stress also tends to disrupt sleep, and poor sleep is associated with reduced insulin sensitivity. The effect is real physiology, not just a feeling.

How much sleep do I actually need?

Most adults do best with seven to nine hours. If you are consistently under seven, that is worth addressing before anything else. Quality matters as much as quantity — seven broken hours is not the same as seven continuous ones.

Is it worth seeing a doctor about stress?

Yes, if stress is affecting your sleep, your eating, your mood, or your blood pressure persistently. A clinician can check for the physical markers that stress affects and help you decide what to change first.

Can I fix this without changing jobs?

For most people, yes. The biggest gains come from protecting sleep and adding daily movement. Those two changes are compatible with a demanding job, and they change the arithmetic more than any other available step.

Does exercise cancel out chronic stress?

No. Regular activity is associated with better stress markers and better sleep, but it does not neutralise chronic overwork. It is one part of the picture, not a trade.

What is the single most important thing to do first?

Fix your sleep schedule. It is the highest-yield lever, it costs no money, and it improves almost every other marker that chronic stress affects.

The bottom line

Working hard is not the problem. Working without doing the arithmetic is. Add the second column — the health cost of the years you are spending — and the work stress health decision becomes much clearer.

Protect sleep. Walk after dinner. Take your leave. The money will still be there; the years will not.

Also read

This article is general information, not medical advice. It is not a substitute for diagnosis or treatment by a qualified health professional. If you have a diagnosed condition or take prescription medication, speak to your clinician before changing your diet, fasting routine or medication.