Why Your Brain Feels Full All the Time: The Cognitive Load Problem in High Performers

Many high-performing professionals reach a point where something begins to feel… off.

Their focus becomes inconsistent.
Their mental clarity fluctuates.
Tasks that once felt straightforward begin to require significantly more effort.

For individuals who are used to operating at a high level, this can feel both confusing and frustrating.

If this is happening to you, it’s important to understand:

You are not losing your capability.

What you may be experiencing is cognitive overload - a state where the brain is holding more information than it can efficiently process (Sweller, 1988; Paas et al., 2003).

The Cognitive Load Problem

Cognitive load refers to the total amount of mental effort being used in working memory.

Working memory is limited in capacity. When this system becomes overloaded, performance declines - not because of a lack of ability, but because of a lack of available cognitive resources (Baddeley, 2012).

This directly impacts executive functions such as:

• working memory

• task initiation

• planning and prioritisation

• sustained attention

If you want a deeper understanding of how these show up in daily life, you can explore more in my article on executive function and real-world performance:
👉 Read How Your Executive Functioning Runs The Show

Why High Performers Are More Vulnerable

High performers often operate with:

• high responsibility loads

• multiple competing priorities

• internalised task tracking

• high personal standards

Over time, this creates a build-up of “open loops” - unfinished tasks and decisions that the brain continues to track in the background (Masicampo & Baumeister, 2011).

This is often where clients start to say:

“I just feel… full.”

ADHD, Executive Function, and Mental Load

ADHD is not a deficit of intelligence or effort.

It is a difference in how the brain activates and regulates attention.

The ADHD brain is uniquely wired and requires:

• interest

• clarity

• structure

to access focus effectively.

If you’ve ever found yourself stuck, overwhelmed, or unable to start, this may resonate:
👉 Read about Procrastination & Task Paralysis here

When cognitive load increases, these systems become harder to access, leading to:

• overwhelm

• inconsistency

• mental fatigue

The Role of “Open Loops” in Mental Overload

Unfinished tasks don’t disappear.

They stay active in the brain, consuming cognitive resources - a phenomenon linked to the Zeigarnik effect (Masicampo & Baumeister, 2011).

This is why you can feel overwhelmed even when you’re not actively doing anything.

Your brain is still holding everything.

Why Pushing Through Stops Working

Many high performers respond to this by increasing effort.

But more effort does not increase cognitive capacity.

In fact, it often leads to:
overload → reduced performance → self-criticism → more effort → burnout

If this cycle feels familiar, you may also resonate with this free resource:
👉 A Focus and Clarity Framework for High  Performers with ADHD Traits

A More Effective Approach: Reducing Cognitive Load

The shift is simple - but powerful:

👉 Stop holding everything in your head.

1. Externalising Cognitive Load

Getting things out of your head reduces pressure on working memory.

This is something I teach inside my Focus and Clarity Framework Guide (you have the link above)

This process - known as cognitive offloading—has been shown to improve performance and reduce mental fatigue (Risko & Gilbert, 2016).

2. Closing Open Loops

When tasks are:

• written down

• scheduled

• delegated

your brain no longer needs to track them.

This frees up capacity for focus and decision-making.

3. Creating Supportive Structure

Your brain performs best when the environment supports it.

At TAP, we don’t try to “fix” the individual - we optimise the system around them.

This concept is something I work on deeply with clients inside my coaching programs.

You Are Not Falling Behind

If your brain feels full, it’s not a sign that you’re failing.

It’s a sign that your current load is unsustainable.

And this is exactly the work we do inside Unstuck: Reclaim Your Rhythm™.

Ready to Reduce the Load?

If you’re finding that your usual strategies are no longer working, this is often the point where support makes the biggest difference.

Option 1: Start Small

Download the free guide:
👉 5 Steps to Clarity & Focus Framework

Option 2: Work With Me

Unstuck: Reclaim Your Rhythm™ is a 6-week group coaching program designed for high-performing womennnavigating:

• cognitive overload

• inconsistent focus

• mental fatigue

Inside the program, we focus on:

• reducing cognitive load

• rebuilding sustainable structure

• understanding how your brain works

👉 Join the waitlist here

Option 3: Get Personalised Support

If you’re ready for tailored support, you can book a Clarity Call with me.

This is a space to:

• unpack what’s going on in your world

• identify your biggest cognitive load points

• map out your next steps

👉 Book for Clarity Call here

Until next time,

Caroline 

Commonly Asked Questions

What is cognitive load in simple terms?

Cognitive load is the amount of information your brain is trying to process at once. When it exceeds capacity, performance drops (Sweller, 1988).

Why do I feel overwhelmed even when I’m capable?

Because overwhelm is often a capacity issue, not a capability issue. Your brain is overloaded, not underperforming (Baddeley, 2012).

Is cognitive overload linked to ADHD?

Yes. ADHD impacts executive functions like working memory and attention, making individuals more sensitive to overload (Barkley, 2012).

How do I know if I need more support?

If you’re:

• constantly feeling mentally full

• struggling to start tasks

• relying on pressure to perform

…it may be time to shift from coping to structured support.

References

Baddeley, A. (2012). Working memory: Theories, models, and controversies. Annual Review of Psychology, 63, 1–29.

Barkley, R. A. (2012). Executive functions: What they are, how they work, and why they evolved. Guilford Press.

Masicampo, E. J., & Baumeister, R. F. (2011). Consider it done! Journal of Personality and Social Psychology, 101(4), 667–683.

Paas, F., Renkl, A., & Sweller, J. (2003). Cognitive load theory. Educational Psychologist, 38(1), 1–4.

Risko, E. F., & Gilbert, S. J. (2016). Cognitive offloading. Trends in Cognitive Sciences, 20(9), 676–688.

Sweller, J. (1988). Cognitive load during problem solving. Cognitive Science, 12(2), 257–285.