When we hear the word “ergonomics,” the first thing that comes to mind is posture. Desk height, monitor angle, lumbar support. The recommendations are clear, the standards exist, and with some effort, everything can be adjusted in a single evening. But the history of ergonomics as a science began far from the office chair — and understanding this changes what an “ergonomic workspace” actually means.

If you want to skip straight to practical steps — the section “What you can do about it” is at the end. But the context helps explain why these particular things matter.

In this article:

• How ergonomics became a science
• Three layers of ergonomics — two of which are rarely discussed
• How your workspace affects you without your awareness
• Why we stop noticing
• Why desk fatigue isn’t always about sleep
• What you can do about it

How ergonomics became a science — and what it was really about

The term “ergonomics” was formally introduced in 1949 by the British psychologist Hywel Murrell, when a group of researchers from different disciplines — physiology, psychology, engineering — came together to study the conditions of human work. But the problem itself had emerged earlier, during World War II, and it had little to do with comfort in the modern sense.

Pilots were making catastrophic errors — not necessarily because they were poorly trained, but because cockpit instrument panels had been designed without sufficient consideration of how humans process information under stress and high workload. Levers that were easy to confuse. Gauges that couldn’t be read quickly. Switches placed where the hand could easily reach the wrong one. Alphonse Chapanis, one of the founders of engineering psychology, demonstrated that many of these accidents could be better understood not simply as “human error,” but as mismatches between system design and human perceptual and motor capacities (Chapanis, 1949).

This was a turning point. Before it, the prevailing logic was selection: find people who can cope with the conditions. After it, a different logic emerged: change the conditions so that people can cope.

It’s worth pausing here, because this applies far beyond aviation. Every time we tell ourselves “I lack discipline,” “I can’t focus,” “I’m probably just lazy” — we are, in essence, applying that same pre-ergonomic logic. Looking for the problem in the person, not the conditions. Ergonomics began with the opposite question: what if it’s not the person?

Three layers of ergonomics — two of which are rarely discussed

The International Ergonomics Association (IEA) identifies three domains: physical, cognitive, and organizational ergonomics. In everyday usage, only the first has taken hold — the one concerned with posture, furniture, and the musculoskeletal system. The other two are less commonly discussed outside professional contexts, even though they often shape how a person feels by the end of a workday.

Cognitive ergonomics studies how the environment affects perception, attention, memory, and decision-making. Its foundations were laid in the work of Christopher Wickens, who developed the multiple resource theory of attention (Wickens, 2008). Wickens showed that attention is not a single stream that can simply be strengthened by willpower, but a system of parallel channels, each with limited capacity. The visual channel can become overloaded independently of the auditory one; spatial processing independently of verbal. When the environment places demands on multiple channels simultaneously, the total load can exceed the system’s capacity — even when each individual demand seems small.

For a home office or workspace, this means that visual complexity in the surroundings, background noise, the need to monitor what’s happening behind you, and the presence of distracting objects in your field of vision all compete for the same resources needed for focused work. The chair may be ergonomically sound, yet the person still feels exhausted — not because of posture, but because of demands on attention.

Daniel Kahneman described this as early as 1973 in Attention and Effort: attention is a limited resource, and its allocation depends not only on the person’s intentions but also on characteristics of the environment — such as pace, stimulus density, and predictability (Kahneman, 1973). The environment can support attention, or it can quietly spend it.

Organizational ergonomics — the third, even less familiar layer — concerns neither space nor perception, but the structure of the work process itself. How tasks are distributed across time. Whether there is an opportunity to complete one task before the next begins. How predictable the rhythm of the day is. Whether there are pauses — real pauses, not simply switching from one screen to another.

Gloria Mark, studying worker behavior in digital environments, found that uninterrupted work periods are often short and frequently interrupted by task switching (Mark et al., 2008). Returning to an interrupted task can take substantial time, and interruptions are associated with increased stress and reduced quality of attention. The exact duration varies, but the pattern is consistent: frequent switching carries a real cognitive cost.

Herbert Simon warned as early as 1971 that in a world saturated with information, the scarce resource is not information but attention (Simon, 1971). Organizational ergonomics addresses exactly this: how the structure of work either protects attention or depletes it — through interruptions, parallel streams, and the absence of completed cycles.

All three layers — physical, cognitive, and organizational — operate simultaneously. The body may be in a comfortable posture, but if the visual environment is demanding and the work process does not allow sustained focus, the overall experience by the end of the day can feel like heavy work.

How your workspace affects you without your awareness

In 1979, James Gibson published The Ecological Approach to Visual Perception, proposing a different view of the relationship between person and environment. For Gibson, the environment is not a passive backdrop, but a field of action possibilities. Every object and spatial configuration offers certain actions — what he called affordances (Gibson, 1979). A chair affords sitting, a button affords pressing, a horizontal surface affords placing or leaning. These possibilities are often perceived directly, without explicit conscious analysis.

Donald Norman, extending Gibson’s ideas into design, showed that well-designed environments reduce cognitive effort by making these affordances clear. When an object clearly suggests how it should be used, the action happens with minimal deliberation. When design is ambiguous or misleading, even small mismatches introduce friction and require additional cognitive effort (Norman, 2013).

A workspace contains many such signals. A phone in your field of vision acts as a constant cue for potential action. Research by Ward and colleagues shows that even the mere presence of a smartphone can reduce available cognitive capacity in demanding tasks, likely because part of attention is engaged in resisting it (Ward et al., 2017).

An open space behind your back can also affect how settled you feel. Some researchers, including Stephen Porges, suggest that the nervous system continuously evaluates environmental safety at an automatic level (Porges, 2011). While the mechanisms are debated, unpredictability in the environment is consistently linked to increased vigilance and reduced ease of sustained focus.

Most of these processes happen without conscious awareness. We don’t decide whether to react. The system responds first, and awareness follows — if it does at all.

Why we stop noticing — and why it matters

The situation is complicated by another well-studied mechanism: habituation. A repeated stimulus gradually ceases to be consciously perceived. We get used to noise, light conditions, and the placement of objects. Thompson and Spencer described habituation as a basic form of learning in which responses to repeated, non-significant stimuli diminish over time (Thompson & Spencer, 1966).

This mechanism is essential — without it, we would be overwhelmed by sensory input. But reduced awareness does not mean absence of effect. Some environmental factors — persistent noise, evening light exposure, visual overload — can continue to influence physiological and cognitive processes even after they disappear from conscious perception.

For example, exposure to short-wavelength (blue) light in the evening has been shown under controlled conditions to suppress melatonin production and shift circadian rhythms (Lockley et al., 2003). The strength of this effect depends on timing, intensity, and duration, but the direction is consistent.

Nilli Lavie, studying selective attention, showed that under high perceptual load, the ability to filter out irrelevant stimuli decreases (Lavie, 2005). An environment that already creates load simultaneously weakens the mechanism that could have protected against that load.

A person doesn’t experience all of this as separate effects. They experience the sum: fatigue, effortful concentration, a sense that work is harder than it should be. And since the sources of that load are no longer visible, the explanation shifts to the only thing that is: oneself.

Why desk fatigue isn’t always about sleep

Robert Hockey described a process called compensatory control: people can maintain performance under suboptimal conditions by increasing internal effort (Hockey, 1997).

This is where the trap appears. Productivity holds up, so everything seems fine. But the cost of compensation doesn’t show up in output. It shows up elsewhere: in accumulating fatigue, in declining stability of attention, in the sense that work takes more out of you than it used to.

Bruce McEwen described this as allostatic load — the cumulative burden on the body’s regulatory systems from ongoing adaptation (McEwen, 1998). It is not illness, but it reduces resilience over time.

Stephen Kaplan proposed an important distinction: some environments demand directed attention and fatigue it, while others allow attention to rest (Kaplan, 1995).

A workspace, by definition, demands attention. But there is a difference between an environment that supports this process and one that quietly drains it.

What you can do about it

Start not with purchases or rearrangements, but with observation. For one workday, notice when your attention drifts, when the urge to get up appears, when fatigue sets in. Not to control yourself, but to see whether any of it is linked to the space around you.

Below are several adjustments grounded in the mechanisms above.

Light

If your lighting stays the same throughout the day, it may be working against your natural rhythms. Cooler light supports alertness earlier in the day; warmer light in the evening aligns better with the body’s transition toward rest. Shifting light temperature after 4 PM can reduce unnecessary strain on the system.

The space behind you

If there is an open space or entrance behind you, part of your attention may be allocated to monitoring it. Turning your desk or adding a visual reference point often makes it easier to settle into work.

Your visual field

Look at what your eyes encounter every time they leave the screen. Objects that are irrelevant but attention-grabbing create continuous low-level competition for focus. Reducing visual clutter tends to make sustained attention easier.

Sound

Background noise is easy to ignore but not neutral. Working in quieter conditions tends to reduce interference on demanding tasks. If silence is uncomfortable, uniform sounds such as white or pink noise are less cognitively demanding than informational noise.

Body position

Posture affects both comfort and alertness. A more upright position is generally associated with higher engagement than prolonged forward-leaning. Raising the screen and separating keyboard and laptop often improves both.

The common thread

What unites these changes is simple: they do not require more discipline.

They change the conditions.

And when the conditions change, the environment begins to work with you instead of against you.

Each adjustment is small. But together, they determine whether the end of a workday feels like depletion or proportionate effort.

Try one change for one day. If you feel a difference, the environment was not neutral — it was part of what you were experiencing.

Not something to overhaul completely.

But something you no longer have to keep compensating for with yourself.

References

Chapanis, A. (1949). Applied Experimental Psychology: Human Factors in Engineering Design. Wiley.

Gibson, J. J. (1979). The Ecological Approach to Visual Perception. Houghton Mifflin.

Hockey, G. R. J. (1997). Compensatory control in the regulation of human performance under stress and high workload: A cognitive-energetical framework. Biological Psychology, 45(1-3), 73-93.

Kahneman, D. (1973). Attention and Effort. Prentice-Hall.

Kaplan, S. (1995). The restorative benefits of nature: Toward an integrative framework. Journal of Environmental Psychology, 15(3), 169-182.

Lavie, N. (2005). Distracted and confused?: Selective attention under load. Trends in Cognitive Sciences, 9(2), 75-82.

Lockley, S. W., Brainard, G. C., & Czeisler, C. A. (2003). High sensitivity of the human circadian melatonin rhythm to resetting by short wavelength light. Journal of Clinical Endocrinology & Metabolism, 88(9), 4502-4505.

Mark, G., Gudith, D., & Klocke, U. (2008). The cost of interrupted work: More speed and stress. Proceedings of CHI 2008, 107-110.

McEwen, B. S. (1998). Stress, adaptation, and disease: Allostasis and allostatic load. Annals of the New York Academy of Sciences, 840(1), 33-44.

Norman, D. (2013). The Design of Everyday Things: Revised and Expanded Edition. Basic Books.

Porges, S. W. (2011). The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-regulation. W. W. Norton & Company.

Simon, H. A. (1971). Designing organizations for an information-rich world. In M. Greenberger (Ed.), Computers, Communication, and the Public Interest (pp. 37-72). Johns Hopkins Press.

Thompson, R. F., & Spencer, W. A. (1966). Habituation: A model phenomenon for the study of neuronal substrates of behavior. Psychological Review, 73(1), 16-43.

Ward, A. F., Duke, K., Gneezy, A., & Bos, M. W. (2017). Brain drain: The mere presence of one’s own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2(2), 140-154.

Wickens, C. D. (2008). Multiple resources and mental workload. Human Factors, 50(3), 449-455.