Why High Performing Adults Struggle
- Brittany Miller
- 3 days ago
- 3 min read
It is one of the most frustrating experiences: you are intelligent, capable, and highly motivated, yet you find yourself paralyzed by a simple email or staring at a project for hours without making a dent.
In research, this is often called the Knowing-Doing Gap. It is the hallmark of Executive Function (EF) struggles in adults, and understanding the science behind it is the first step toward reclaiming your productivity.
All Decisions & Tasks Require Processing
Executive Function is not a measure of your IQ; it is a measure of your brain's efficiency and chemical balances that drive our behavior. While you know exactly what needs to be done, your executive brain, the prefrontal cortex, is responsible for the timing, sequencing, and initiation of those actions.
Research shows that for many adults, the prefrontal cortex is under-resourced for today's complex world. When the demands of a high-pressure career, demanding project or a complex family life exceed the brain’s executive capacity, your prefrontal cortex becomes overwhelmed with the to-do list or lacks the chemicals needed, such as dopamine, to start up - the system stalls. It's a matter of cognitive load.

Research-Backed Reasons Why High Performing Adults Struggle
1. The Procrastination-Stress Loop
Many believe procrastination is about poor time management. Research suggests it is actually a strategy for mood regulation. The brain does not like stress. When a task feels overwhelming, the brain’s amygdala, the threat center, perceives it as a danger. To protect you from stress, it redirects you to a safe task, like checking email or social media. This provides temporary relief but creates a long-term cycle of stress and shame as what you genuinely needed to get done was not addressed.
2. Cognitive Fatigue and the Decision Tax
Every time you use your executive functions to prioritize a list, inhibit an impulse, or shift between tasks you deplete a finite resource called Working Memory. For adults, parents, and professionals who spend most of day making a million decisions of every size, their brain get fatigued just like the body when its constantly in motion. This includes the demand of regulating emotions and impulsive responses under stress. By the afternoon, the brain’s ability to self-regulate and make decisions is significantly diminished, leading to the afternoon slump or burnout.
3. The Myth of Multitasking
The human brain cannot multitask; it can only task-switch. Switching back and forth between complex tasks can cost up to 40% of someone's productive time. The more tasks you try to simultaneously manage, the higher the time cost, leading to the feeling of being busy all day without actually accomplishing anything.

How to Close the Knowing-Doing Gap
The good news is that the brain is flexible and adaptable. It learns and grows stronger connections throughout our lives. Just like learning to draw, executive functions are not fixed traits, they are skills that can be strengthened through intentional intervention and environmental scaffolding.
Externalize the Information
Since Working Memory is a finite resource, research suggests externalizing it. This means moving information out of your head and onto paper or digital systems. But the key is simplicity. A complex system creates more cognitive load. A simple, visible system reduces it.
Strategic Chunking
Large projects trigger the brain's threat response. By breaking down a large task into chunks of steps that takes less than ten minutes, you bypass the amygdala's threat response and allow the prefrontal cortex to take the lead.
Harness the Power of the Peer Group
Research into body doubling and peer accountability shows that the presence of others, even virtually, can significantly improve task initiation and sustained attention. This is why coaching in all its forms is so effective: it provides the external structure your brain needs to build its own internal strength.
Reframe the Narrative
Struggling with executive function as an adult is not a sign of incompetence. It is a sign that your current environment and demand is outstripping your brain's current capacity. We all struggle in different ways, and have different strengths and weaknesses.
By shifting the focus from trying harder to strategizing smarter, you can close the gap between what you know you can do and what you actually achieve.
