Hey Reader,

For THIRTY years, he assumed the exhaustion was just what work felt like.

Last week, I launched my 'User Manual' for introverts and the first testimonial I received echoed something I've heard many times from members of my community:

Performing extroversion comes at a cost, and it's a cost we often only realise years - or even decades - later than we should.

This customer also told me in a DM that, "Sadly I really needed this information about 25 years ago".

I think what he wrote in his testimonial may resonate with you too:

It definitely resonated with me.

And what really stood out was the word assumed; he hadn't questioned it. He'd just absorbed the exhaustion as the price of working life and kept going.

Most introverts spend years doing exactly that.

Absorbing the cost quietly, without a framework to explain it to themselves or anyone else. The feedback never quite named it. Leadership sensed something was missing but couldn't say what - and neither could you.

The gap between how you operate naturally and what the room seems to require just gets filed under things to fix about yourself.

I know I definitely spent my years as an employee feeling like there was something wrong with me, and constantly physically and mentally unwell. It's why began working for myself.

Here's the biology in plain language: introvert brains run at a higher baseline level of arousal than extrovert brains.

Research suggests that means the same meeting, the same open plan floor, the same afternoon of back-to-back interaction that reads as a normal Tuesday for the person next to you is - for your nervous system - significantly louder.

The stimulation is real.

The cost is real.

Most of what you've been quietly absorbing traces back to that biology, NOT to a gap in your character.

A character assessment sends you toward personal development: push through, adapt, be more visible, speak up faster.

Biology sends you somewhere else entirely - toward a framework built around how your brain actually works, rather than one built around how everyone else's does.

That's the starting point for everything in the Introvert OS™ User Manual - the biology first, because everything else follows from it.

So this week's question:

The exhaustion you've never questioned because you assumed everyone felt it too.

Sit with it. And if something comes up, hit reply. I read everything.

In your corner always,

Sam 💛

P.S. If any part of his experience feels familiar, you’ll recognise yourself in it. Get the User Manual here.

Sam Sheppard Introvert Strategist Neuroscience-backed insights for introverts who are tired of adapting to a world that wasn't built for them.