Racing Thoughts, Task Paralysis & the High-Performing Brain

 You built the systems. You're the one other people come to when they're overwhelmed. From the outside, nothing about you looks like someone struggling to function.

You may find yourself staring at the ceiling, replaying a conversation from nine hours ago while somehow also drafting tomorrow's email in your head and worrying about a decision you made back in March. Or: the deck is due in twenty minutes and you've read the same slide four times without absorbing a word of it, even though on a good day you could write this presentation in your sleep. Or: you walk out of back-to-back meetings and realise you can't actually remember what was decided in the first one.

If any of that sounds familiar, this is for you specifically - not the generic "everyone's a bit scattered these days" version of this conversation, but the one for people whose job is to hold an unreasonable amount in their head, all day, every day, and who are good enough at it that nobody around them has noticed the cost.

Key Takeaways

• Executive dysfunction doesn't look like underperformance in high performers - it looks like exhaustion behind a track record that still, somehow, holds up. Founders and executives are often the best at masking it, which is exactly why it often goes unaddressed.

• Racing or looping thoughts at night are one of the most common ways this shows up. Research links racing thoughts closely with both ADHD-type attention patterns and anxiety, and the two frequently occur together rather than as separate problems.
• The always-on, back-to-back nature of leadership roles is not a neutral backdrop. Focused attention on a single task has collapsed from roughly two and a half minutes in 2004 to under a minute today, and a real interruption takes over twenty minutes to recover from. A leader's day is often built almost entirely out of these costs.
• More than half of adults currently diagnosed with ADHD were diagnosed after age 18 - often well into a demanding career, after years of compensating through sheer capability.
• This isn't a discipline problem, and better time-blocking won't fix a system that's already at capacity. Structural change - reducing what your brain has to hold at once - tends to help more than trying harder does.

Why High Performers Are the Last to Notice

 Executive function is the brain's capacity to plan, start tasks, process and hold information in mind while using it, switch between competing demands, and manage your emotions while doing all of that at once. Harvard's Center on the Developing Child describes it as something like an air traffic control system - juggling multiple incoming signals and deciding, moment to moment, what happens next. 

Executive dysfunction is what happens when that system is asked to do more than it currently has capacity for. This is the part that catches Founders, executives and high performers off guard: the strong executive function skills that built your career - that got you promoted, that let you build the company, that made you the person who "can handle anything" - are often exactly what let you outrun this for years. You built more effective coping systems than most people ever need. Which means by the time those systems finally buckle under enough load, it doesn't look like a gentle warning sign. It looks like suddenly, inexplicably, falling short of what you used to be capable of.

This is why so many founders and executives only recognise themselves in a description of ADHD or executive dysfunction well into adulthood - often having spent years assuming the problem was that they simply hadn't found the right system yet. More than half of adults with a current ADHD diagnosis were diagnosed after turning 18, frequently in the middle of exactly this kind of high-stakes, demanding and high-responsibility career rather than before it.

The 1am Loop: Why Racing Thoughts Happen to the Most Capable People in the Room

 Racing minds and looping thoughts are two of the most common ways people describe this experience - and the research backs up why they show up together so often. A 2025 study examining the overlap between ADHD symptoms, rumination, racing thoughts, depression and anxiety found that these patterns cluster rather than occur in isolation: attention difficulties and the racing, crowded quality of thought are frequently part of the same underlying picture.

For a leader, this tends to show up at the worst possible time - the moment the day finally goes quiet. During the day, the sheer volume of decisions and inputs can act almost like white noise, keeping any one thought from looping for long. At night, with nothing left competing for attention, the loop finally appears centre stage. 

There's a separate but related body of research on rumination specifically - repetitive, stuck thinking that often overlaps with racing thoughts but isn't quite the same thing. Psychologist Susan Nolen-Hoeksema's long-running research found that people who habitually ruminate are considerably more likely to go on to experience major depression than those who don't. That's not a reason for alarm - it's a reason to take the pattern seriously rather than writing it off as just "how your brain is."

Your Calendar Is Not a Neutral Backdrop

 If your days are built almost entirely from meetings, context switches and interruptions - which, for most leadership roles, they are - you're working inside one of the most cognitively expensive environments that exists.

Dr. Gloria Mark, an informatics professor at UC Irvine who has spent two decades measuring real-world attention, found that the average time people spend focused on a single screen before switching has fallen from roughly two and a half minutes in 2004 to under a minute in more recent measurements. Her research also found that after a genuine interruption, it typically takes over twenty minutes to fully return to the original task - and in the meantime, people usually complete two other tasks, which is a fairly accurate description of most executive calendars.

These findings are linked to cognitive load theory, first developed by educational psychologist John Sweller. This theory discusses working memory having a strictly limited capacity, and once demand exceeds it, performance doesn't gently taper off - it stalls. If your day consists of back-to-back decisions with no recovery time between them, the fatigue and fog you feel by 4pm isn't a personal failing. It's a predictable outcome of the demands of your day. 

 It's Not Always ADHD - It is Worth Exploring, Not Ignoring

Racing thoughts, task paralysis and executive overload happen with ADHD, and they also happen with burnout, chronic stress, sleep debt, anxiety, and simply running a company or a large team for long enough without adequate recovery built in. You don't need a diagnosis for the experience to be real, and you don't need to wait for one before addressing it.

What isn't useful is the advice most high performers default to first: try harder, get a better planner, try a new "productivity hack", push through with more discipline. That approach asks an already-overloaded system to fix its own overload using the one resource that's in shortest supply - and it tends to work about as well as it sounds. Messy. 

What tends to help more:

• Getting things out of your head, not better organised inside it. Externalising reduces the actual working-memory load; a better mental filing system doesn't.
• Building real recovery time between high-stakes tasks, rather than assuming you'll snap straight back to full capacity after every meeting or decision.
• Treating the 1am loop as a signal, not a character flaw - it's telling you load is high, not that something is wrong with you.
• Getting support that starts from an accurate model of what's happening, rather than generic productivity advice aimed at a brain under much lower load than yours.

FAQ

Why do I only get racing thoughts at night, when I'm fine all day?
During the day, competing demands often crowd out any single looping thought. At night, with less external input, the loop finally has room to run. It's a common pattern, not a sign anything is uniquely wrong with you.

Can you have executive dysfunction without ADHD?
Yes. It also occurs with burnout, chronic stress, anxiety, depression and sustained high-responsibility roles, with or without a formal diagnosis.

Why didn't I struggle with this earlier in my career?
Strong executive function and good coping systems can mask underlying difficulty for years, especially in capable, high-achieving people - until the load finally exceeds what those systems can absorb. Many adults are diagnosed with ADHD well into adulthood for exactly this reason.

Is this just burnout?
It can overlap heavily with burnout, but not always - some people experience this pattern even in roles or seasons that don't look like classic burnout from the outside. Either way, the same underlying support tends to help.

What's the difference between this and imposter syndrome?
They can look similar but come from different places. Imposter syndrome is a belief about your competence; executive dysfunction is a functional difficulty with starting, sustaining or organising tasks. The two often show up together, since struggling to function while still performing well can itself feed the feeling of being a fraud.

Do I need a diagnosis before doing anything about this?
No. A proper assessment is worth pursuing if you suspect ADHD specifically, but the strategies that help with executive dysfunction are worth starting regardless of whether or when a diagnosis happens.

References

1. Center on the Developing Child at Harvard University. InBrief: Executive Function — Skills for Life and Learning.https://developingchild.harvard.edu
2. Staley, B.S. et al. (2024). Attention-Deficit/Hyperactivity Disorder Diagnosis, Treatment, and Telehealth Use in Adults. MMWR Morbidity and Mortality Weekly Report, 73(40), 890–895. Summarised via CHADD: https://chadd.org/about-adhd/general-prevalence-adults/
3. Devenish, B. (2025). The Role of Rumination and Racing Thoughts in Co-Occurrence of ADHD Symptoms, Depression and Anxiety Symptoms. Mendeley Data. https://data.mendeley.com/datasets/cwrtd5tbd8/1
4. Nolen-Hoeksema, S. Research on rumination and depression risk, summarised via Talkspace: https://talkspace.com/blog/what-is-rumination
5. Mark, G. (2023). Attention Span: A Groundbreaking Way to Restore Balance, Happiness and Productivity.Summary: https://www.blinkist.com/en/books/attention-span-en
6. Sweller, J. (1988). Cognitive load during problem solving: Effects on learning. Cognitive Science, 12, 257–285.