Stress Isn’t Just About Load. It’s About Fit.

One of the most common misconceptions about stress is that it’s simply the result of having too much to do.

We often hear advice like:

“Reduce your workload.”

“Simplify your schedule.”

“Manage your stress better.”

While these suggestions can be helpful, they overlook something fundamental.

Stress is rarely determined by workload alone.

Two people can face the same objective demands and have completely different experiences. One may finish the day feeling challenged but energized. Another may feel mentally exhausted, emotionally depleted, or physically overwhelmed before the day is even over.

That difference isn’t simply about willpower, resilience, or motivation.

More often, it’s about the interaction between the person and the environment.

Research spanning decades suggests that stress reflects the relationship between external demands and an individual’s available resources, appraisal of those demands, physiological state, and the degree of fit between the person and their environment (Lazarus & Folkman, 1984; Kristof-Brown et al., 2005; McEwen, 1998).

In other words:

The same demand does not create the same cost for every nervous system.

The Hidden Cost of Adaptation

When most people think about stress, they focus on what is visible:

• deadlines

• meetings

• parenting

• financial pressures

• caregiving

• work responsibilities

Those certainly matter.

But there is another layer that often remains invisible.

For many people—particularly those with ADHD, autism, or other forms of neurodivergence—the greatest source of fatigue is not always the task itself.

It’s the constant energy required to adapt.

That adaptation might include:

• filtering sensory information

• suppressing natural behaviors through masking or camouflaging

• shifting attention between competing demands

• decoding implicit social expectations

• managing uncertainty

• compensating for executive functioning differences

• continuously monitoring one’s own behavior while trying to meet environmental expectations

Each of these processes requires cognitive, emotional, and physiological resources.

Research increasingly supports the idea that executive functioning differences, sensory processing differences, and social camouflaging all contribute to increased cognitive effort and fatigue in many neurodivergent individuals (American Psychiatric Association, 2022; Faraone et al., 2021; Hull et al., 2017; Livingston et al., 2019).

The task hasn’t changed.

The cost of performing the task has.

Performance Doesn’t Tell the Whole Story

One of the assumptions we often make is that if someone is performing well, they must be functioning well.

That isn’t always true.

Someone may earn excellent grades.

Build a successful career.

Raise children.

Lead meetings.

Appear calm.

Smile.

Meet every deadline.

From the outside, everything appears fine.

Yet internally, they may be operating at the edge of their available capacity.

This is particularly relevant for many twice-exceptional (2e) individuals, whose high cognitive ability may allow them to compensate for learning differences or neurodevelopmental challenges for years before the cumulative cost becomes apparent (Foley-Nicpon et al., 2013).

Likewise, autistic adults frequently describe social camouflaging as requiring significant mental effort, even when it successfully hides their difficulties from others (Hull et al., 2017; Livingston et al., 2019).

This distinction has become increasingly important in my own clinical thinking.

Performance is what other people can observe.

Processing cost is what the nervous system had to spend to produce that performance.

Those are not always the same thing.

In fact, they can be dramatically different.

Two people may produce identical work.

One may finish with energy remaining.

The other may need hours—or even days—to recover.

Observable performance alone cannot tell us how expensive that performance was.

Recovery Is Part of the Equation

Another piece that is often overlooked is recovery.

Stress is not simply about what we expend.

It’s also about what we restore.

Bruce McEwen’s work on allostatic load demonstrates that repeated activation of stress-response systems without adequate recovery can create cumulative physiological wear and tear over time (McEwen, 1998).

Recovery is not laziness.

It is a biological necessity.

When recovery consistently fails to keep pace with the cumulative cost of adaptation, the nervous system has fewer available resources to respond to future demands.

Tasks that once felt manageable may begin to feel overwhelming.

Attention becomes harder to sustain.

Emotional regulation becomes more difficult.

Executive functioning declines.

Stress tolerance narrows.

The workload may not have changed at all.

The available capacity has.

Why Environmental Fit Matters

Research on person–environment fit has consistently shown that well-being, job satisfaction, performance, and psychological health are influenced not only by individual characteristics, but also by how well those characteristics align with the environment (Kristof-Brown et al., 2005).

Sometimes the problem isn’t the person.

Sometimes the environment asks for a style of processing that comes at an exceptionally high cost.

A noisy office may consume enormous sensory resources.

Frequent task switching may disproportionately tax executive functioning.

Ambiguous expectations may require continuous cognitive monitoring.

Social environments that reward constant masking may quietly drain energy long before anyone notices.

Improving environmental fit doesn’t eliminate stress.

But it often reduces unnecessary processing costs.

A Bandwidth Model™ Perspective

The Bandwidth Model™ builds on these established areas of research while offering a broader conceptual framework for understanding why functioning changes from day to day.

From this perspective, available bandwidth reflects the interaction among:

• neurodevelopmental architecture

• environmental fit

• cumulative allostatic load

• physiological state

• executive functioning demands

• recovery opportunities

• ongoing processing costs

Rather than viewing functioning as a fixed trait, the Bandwidth Model™ conceptualizes capacity as dynamic and responsive to changing internal and external conditions.

The model also emphasizes an important distinction:

Potential is not always the same as availability.

A person may possess the knowledge, intelligence, or skill to complete a task while lacking the available bandwidth to access those abilities in that moment.

That distinction can help explain why functioning often fluctuates across contexts, environments, and periods of increased stress or burnout.

Perhaps We Need Better Questions

Instead of asking,

“Why can’t I handle this?”

Perhaps we should begin asking:

• How much processing cost is hidden beneath my performance?

• Does this environment fit the way my nervous system processes information?

• Am I expecting recovery to occur without making space for it?

• What adaptations would reduce unnecessary cognitive and physiological load?

• Am I measuring success by productivity alone while ignoring sustainability?

Sometimes the answer isn’t simply working harder.

Sometimes it isn’t doing less.

Sometimes it’s creating a better fit.

The Bandwidth Model™ is an original evidence-informed conceptual framework developed by Darcy Stephens, LPCC. It synthesizes findings from neuroscience, psychology, neurodevelopment, executive functioning, stress physiology, environmental fit, sensory processing, and nervous system regulation. While informed by the scientific literature, the Bandwidth Model™ itself has not yet been empirically evaluated and should be considered a conceptual framework rather than an empirically validated scientific model.

Darcy Stephens, LPCC

References

American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.). https://doi.org/10.1176/appi.books.9780890425787

Faraone, S. V., Asherson, P., Banaschewski, T., et al. (2021). The World Federation of ADHD International Consensus Statement: 208 evidence-based conclusions about the disorder. Neuroscience & Biobehavioral Reviews, 128, 789–818. https://doi.org/10.1016/j.neubiorev.2021.01.022

Foley-Nicpon, M., Assouline, S. G., & Colangelo, N. (2013). Twice-exceptional learners: Who needs to know what? Gifted Child Quarterly, 57(3), 169–180. https://doi.org/10.1177/0016986213490021

Higgins, J. M., Arnold, S. R. C., Weise, J., Pellicano, E., & Trollor, J. (2021). Defining autistic burnout through experts by lived experience: Grounded Delphi method investigating #AutisticBurnout. Autism, 25(8), 2356–2369. https://doi.org/10.1177/13623613211019858

Hull, L., Petrides, K. V., Allison, C., et al. (2017). “Putting on My Best Normal”: Social camouflaging in adults with autism spectrum conditions. Journal of Autism and Developmental Disorders, 47(8), 2519–2534. https://doi.org/10.1007/s10803-017-3166-5

Kristof-Brown, A. L., Zimmerman, R. D., & Johnson, E. C. (2005). Consequences of individuals’ fit at work: A meta-analysis of person-job, person-organization, person-group, and person-supervisor fit. Personnel Psychology, 58(2), 281–342. https://doi.org/10.1111/j.1744-6570.2005.00672.x

Lazarus, R. S., & Folkman, S. (1984). Stress, Appraisal, and Coping. Springer.

Livingston, L. A., Shah, P., & Happé, F. (2019). Compensatory strategies below the behavioural surface in autism: A qualitative study. The Lancet Psychiatry, 6(9), 766–777. https://doi.org/10.1016/S2215-0366(19)30224-X

McEwen, B. S. (1998). Protective and damaging effects of stress mediators. New England Journal of Medicine, 338(3), 171–179. https://doi.org/10.1056/NEJM199801153380307

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