Three Kinds of Tired That Look Identical
Three people told you they were tired in the last fortnight. Mary said it in a one-to-one meeting. John said it in the corridor and laughed afterwards. David typed it in Slack at 9:40pm and then apologized for typing it.
You made a note to watch their workloads. Two of them will be worse in a month.
In 2010, Jesús Montero-Marín and Javier García-Campayo published a 36-item instrument in BMC Public Health that splits burnout into three clinical subtypes according to how someone responds when pressure rises: frenetic, under-challenged, and worn-out. Same exhaustion at the surface, three different engines underneath.
Two of the three below come from that line of research. The third sits outside it, which is part of why it gets missed.
The practical stake is high, because the standard managerial response to all three is identical. Protect the workload, suggest some leave, check in next month. This response repairs one of them, does nothing for the second, and actively damages the third.
The one that comes from too much
Mary is a senior analyst four years in, and she is the reason the quarter closed. When something breaks on a Thursday, she works until it doesn't. When a second thing breaks, she works Saturday. Her involvement in the job is total and her ambition is real, and both of those are the fuel.
The combination of involvement, ambition, and overload is what Montero-Marín's frenetic profile measures. The person under pressure responds by adding hours.
Give Mary a week off and she will return to the same beliefs and the same inbox and rebuild the pile inside nine days. What actually moves her is written permission to do something worse. Pick one recurring deliverable, define what good enough looks like on it with a number, and put it in the shared doc so she can point at it later. The Thursday report gets forty minutes and goes out at ninety percent. She will argue with you. Leave it in the doc anyway.
Boredom is heavier than it sounds
John finished the intercompany reconciliation at 2:10pm on Tuesday and made it last until 5:40 because nothing came after it. Three years, same file, same fields.
Nobody is overloading him, and the exhaustion is still real. Turning up to work that asks nothing of you costs something to sustain.
Lotta Harju, Jari Hakanen, and Wilmar Schaufeli followed 1,630 Finnish employees across three years and found that people who actively sought out more challenging work reported less boredom and more engagement at the next measurement point. The same study found the reverse running too: bored employees became less likely to go looking for challenge at all. So it sets, like concrete, and the person who could have crafted their way out stops trying.
The move with John is one problem you don't already have the answer to, with real stakes and a date on it. "Our error rate on the intercompany line jumped in Q2, and nobody knows why. Take three weeks. " Then watch whether 2:10pm stays empty.
When the work goes against the grain
David was told in January to hold refund approvals an extra billing cycle to protect the quarter. He does it. He explains it to roughly thirty customers a week, in his own voice, to people he can hear getting upset.
He is not overloaded and he is not bored. He is tired in a way that annual leave will not reach.
Brett Litz and colleagues named this in 2009 while working with veterans: moral injury, the lasting damage that follows perpetrating, failing to prevent, or witnessing acts that transgress deeply held moral beliefs. The research travelled out of the military. A 2025 study in the Journal of General Internal Medicine surveyed nationally representative samples and found 50.8% of healthcare workers reported exposure to a potentially morally injurious event, alongside 49.3% of combat veterans in the same study.
The office version is smaller and continuous. The apology you don't believe as you send it. The number you present in a review, knowing exactly how it was built. The candidate you tell there were stronger applicants when the role was filled internally in week one.
None of that is dramatic. It accumulates, and it accumulates fastest in the people who deal directly with whoever is on the receiving end, which usually means your support, service, and frontline staff and almost never means you.
Rest makes this one worse, because the thing is still true on the Monday, and now they've had a week alone with it. What helps is changing the instruction or telling them straight why it stands and until when. Vague reassurance gets read as complicity, and they are right to read it that way.
How to tell them apart on a Wednesday
Three questions, in this order, in a room with the door shut. It takes about eight minutes.
- "When something goes wrong this week, what's your first instinct?" Working later points to overload. A shrug or a sigh points to worn-out or to the moral kind. "Why bother, it's the same file anyway" points to under-challenge.
- "What's the last thing you did here that you'd tell a friend about?" If they have to reach back past this quarter to find one, you're looking at boredom, whatever their hours say.
- "Is there anything we ask you to do that you'd be uncomfortable explaining to someone outside work?" This one is awkward. Ask it anyway, and stay quiet for a full five seconds after you do.
The answers sort into treatments that contradict each other. Time off repairs the overloaded person only when you also change what she believes she owes you. Time off does nothing for John and hands David a week alone with the thing.
Run all three questions even when you're confident after the first. The overloaded person is often also the person quietly carrying the moral one, because the people who work weekends for you are the people who care what the work does.
The one thing this week
One line in your notebook for each person who used the word: which tired, and what you're changing. Three names, three lines, one Wednesday.
They all said the same thing to you. You have eight minutes to find out what any of them meant.
