There was a year at work where I don't remember anything significant from my personal life.
I hit a bunch of deadlines. We shipped product and made money. But ask me what happened outside of work that year, and I got nothing. No memories. Just a blur of work activities.
That was the first sign I was burning out.
When burnout hit a month later, I kept working but it felt like someone else was doing the activities. I was disengaged from work, not feeling the excitement and joy I was feeling before. I felt physically tired and thought I just needed more rest.
Had I taken the Maslach Burnout Inventory (MBI), a validated research tool that measures burnout, I would have scored high on emotional exhaustion, high on depersonalization, and dangerously low on a sense of personal accomplishment.
My nervous system was dysregulated, and I didn't even have the words for it yet. My brain wasn't just tired. It was actually rewiring itself in a physical and measurable way.
It took four months to recover. Four months to feel like myself again. I wish I knew it at the time and could see the signs earlier...
THE SCIENCE
Your prefrontal cortex is the front part of your brain. It handles working memory, impulse control, and judgment. It's your leadership center.
When stress becomes chronic, cortisol starts to shrink the connections there. The dendrites, tiny branches that neurons use to talk to each other, wither and pull back. The network weakens.
Your brain doesn't just regress, it reroutes. Control shifts to older, more reactive systems. Fight-or-flight kicks in. Habit loops take over. Emotional reactions replace careful thought.
Amy Arnsten has spent her career at Yale studying what stress does to the brain. In 2021, her team pulled together decades of research and landed on a clear conclusion that chronic stress degrades prefrontal function (Woo, Sansing, Arnsten, & Datta, 2021, Chronic Stress, 5). Most of the structural evidence comes from animal studies. But the direction of the effect is not in dispute.
This is not about feeling stressed. This is your brain's architecture changing under pressure.
THE TAKEAWAY
The flip side? These changes are reversible. Your brain can rebuild those connections when you give it the recovery it needs.
Recovery is not a reward for hard work. It is a performance input.
YOUR EDGE THIS WEEK
It's hard to see the early signs of burnout while you are in it. You have to find time to inspect. Are you disengaged? Are you feeling irritable/impatient/de-personalized? Are you losing a feeling of job satisfaction? If you are feeling these, it might be time to measure with a well established tool like MBI and proactively intervene in the stress response:
1. Protect one recovery block per day (at least). Put 30 minutes on your calendar where you do nothing productive. Walk. Sit outside. Let your brain idle. Guard it like a meeting with your CEO.
2. Name your stress response. When you notice yourself snapping or blanking, pause and inspect. Label it if you can (e.g., "That's cortisol, not me.") This tiny act of labeling shifts activity back toward your prefrontal cortex.
3. Sleep like it's your job. Because it is the foundation of high performance. Your brain clears stress byproducts and repairs connections during deep sleep. Seven hours minimum. No screens in the last hour.
Skip recovery and the hardware suffers.
Use recovery and your hardware adapts to higher levels of performance.
Be well,
Eric
P.S. Want to design your week for more of these breakthroughs? Try my Calendar Coding Exercise.
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