Human Engineering: What If We Thought About People as Adaptive Systems?

I began my working life as an engineer.

At the time, I could not have imagined that the way of thinking I was learning — understanding systems, looking for relationships, identifying where energy was being wasted, anticipating failure and asking why something was not working effectively — would eventually shape the way I thought about people.

Engineering teaches you to look beyond the obvious fault.

If a component fails, replacing it may solve the immediate problem. But a good engineer also wants to know why it failed. Was it overloaded? Poorly aligned? Was there unnecessary friction? Had the system gradually moved outside its useful operating range?

Years later, working with movement, rehabilitation, coaching and human behaviour, I realised that I was asking remarkably similar questions.

Not because human beings are machines. They clearly are not.

But because human beings are systems.

And systems have relationships.

They receive information. They respond to changing conditions. They organise resources. They develop patterns. They learn from experience. They compensate when something becomes unavailable.

Most importantly, they adapt.

That observation became the starting point for my new book, Human Engineering: A Systems Approach to Movement, Rehabilitation and Human Performance.

Looking Beyond the Problem

Consider something as ordinary as standing up from a chair.

We could look at leg strength. We could examine joint range. We could assess balance. If pain is present, we could investigate the painful structure.

All of those perspectives can be useful.

But the person standing from the chair is doing far more than contracting a collection of muscles.

They are simultaneously organising their feet, body mass, joints, muscles, breathing, vision, balance, attention, expectations and previous experience. They are responding to the chair, the floor and the environment around them. They may even be anticipating pain or instability before movement begins.

There isn't a convenient point at which the physical person ends and the perceptual or emotional person begins.

There is simply a human being attempting to meet a demand.

That is the territory I have come to think of as Human Engineering.

What Is the System Trying to Achieve?

This changes the questions we ask.

Instead of looking only at what has gone wrong, we can become curious about how the person is currently organising themselves.

What is the system trying to achieve?

What information is it responding to?

Where is unnecessary effort occurring?

What is it predicting will happen?

What options does it have available?

And perhaps most importantly:

How can this system organise itself more effectively with the resources already available to it?

This does not mean ignoring pathology, strength, mobility, pain or any of the other things rehabilitation professionals quite rightly assess.

It means placing them within a larger system.

Capability is not simply what somebody possesses. It is what they can organise and make available when a situation requires it.

A person might possess considerable strength but be unable to use it effectively when their balance is threatened. Someone might perform an exercise perfectly in a clinic yet struggle to reproduce the same organisation while climbing their own stairs.

Another person may be physically capable of a movement but, through previous pain, injury or experience, have learned not to trust it.

The question beneath Human Engineering therefore became:

How do human beings maintain and recover their capability throughout life?

Principles Before Exercises

We like exercises.

They are tangible. We can demonstrate them, photograph them, write them on a sheet and count them.

Three sets of ten. Twice a day. Six weeks. Then review.

There is nothing inherently wrong with that.

Exercises can develop strength, mobility and cardiovascular capacity. They can help restore confidence and provide the repetition through which learning occurs.

But an exercise is not a principle.

Exercises are context-specific; principles are transferable.

An exercise may work within a particular set of circumstances. A principle can travel.

From the clinic to the kitchen.

From a Tai Chi class to a staircase.

From rehabilitation to sport.

From standing up from a chair to recovering from an unexpected stumble.

From practising movement to living.

This distinction eventually led me to six organising principles:

Alignment — Relaxation — Centre — Breathing — Balance — Confidence

They are not six independent techniques or a hierarchy to work through. They interact as parts of the same organised human system.

Alignment asks how forces are being managed for the task.

Relaxation asks where effort is necessary and where it is not.

Centre provides a practical reference for organising body mass and weight transfer.

Breathing interacts with movement, posture, attention and emotional regulation.

Balance is not simply the ability to remain still. It is the continuing capacity to detect change, make appropriate corrections and recover.

And confidence is more than positive thinking. It develops through credible experiences that provide evidence that we have sufficient resources to respond to what happens next.

An exercise gives us something to do.

A principle gives us something to investigate.

Why Tai Chi?

Tai Chi has inevitably influenced this way of thinking.

I have practised and taught Tai Chi for more than thirty years, initially approaching it primarily as a martial art. Over time, however, I began to see something else within it.

Tai Chi provides an unusually rich laboratory for investigating human movement.

Slow movement makes organisation easier to observe.

Weight transfer makes balance tangible.

Relaxation exposes unnecessary effort.

Alignment changes how forces are distributed.

Breathing changes internal organisation.

Variation creates contrast.

And attention turns movement into investigation.

The interesting questions therefore become less about reproducing the outward appearance of a Tai Chi movement and more about investigating what happens within the person:

What happens when I reduce unnecessary tension?

What happens when I organise my movement from my centre?

What happens when my whole body participates?

What happens when I become unstable and, rather than immediately stiffening, allow myself to respond?

What happens when I organise rather than force?

These are experiments.

The body provides the laboratory.
Movement provides the intervention.
Sensation provides feedback.
Experience provides evidence.
And curiosity provides the method.

But Human Engineering is not a book about learning Tai Chi.

Nor is it an attempt to claim that contemporary science somehow “proves” traditional Tai Chi.

Tai Chi is one of the places from which the questions emerged.

The questions themselves are much broader.

From Correction to Curiosity

There is another important shift within this approach.

When we see the human being as an adaptive system, a difficulty is not automatically evidence that the system is defective.

Sometimes the current organisation may have developed because, at some point, it was useful.

Someone who has experienced pain may protect an area.

Someone who has fallen may reduce their movement.

Someone who feels unstable may increase muscular tension.

Someone who expects difficulty may begin organising themselves for that difficulty before it occurs.

The strategy may make sense within the circumstances in which it developed.

The problem is that circumstances change.

A protective response that was useful immediately following an injury may eventually restrict movement. Increased stiffness that initially created a sense of security may later interfere with adaptable balance.

This invites curiosity rather than simply correction.

Instead of asking only, “What is wrong?”, we can also ask:

“What problem is the system currently trying to solve?”

And then:

“Can we create experiences through which it discovers another option?”

From Repetition to Adaptability

This leads to another distinction that became increasingly important while writing the book.

Successful rehabilitation cannot simply mean becoming good at performing the rehabilitation exercise.

Life is variable.

The chair changes.

The surface changes.

Attention changes.

Fatigue changes.

The environment changes.

And the person changes from one day to another.

A capability that exists only under one carefully controlled set of circumstances is therefore limited.

The aim is not to create one permanently perfect solution.

It is to develop useful options.

This is why variability, feedback and adaptation become so important. The person needs opportunities not merely to repeat a solution, but to learn how to reorganise when circumstances change.

Resilience emerges from this same idea.

It does not require that nothing ever disturbs us.

In movement, losing balance is not necessarily the most interesting event. The more useful question may be:

What happened next?

Did the person stiffen?

Freeze?

Reach?

Step?

Adjust?

Recover?

Sometimes the recovery tells us more about capability than the wobble.

As I write in the book, resilience is the capacity to maintain, recover or reorganise meaningful capability when circumstances change.

Resilience does not come from certainty.

It comes from having options.

Why I Wrote Human Engineering

For much of my professional life, engineering, Tai Chi, coaching, therapeutic work and rehabilitation appeared to occupy different worlds.

Increasingly, I realised that I was asking variations of the same questions within all of them.

How does the system organise itself?

What information is it using?

What feedback is available?

What happens when one variable changes?

Where is unnecessary effort occurring?

And what does the system learn from the result?

Human Engineering: A Systems Approach to Movement, Rehabilitation and Human Performance brings those questions together.

It is not intended to provide another rigid methodology or collection of exercises. Nor does it suggest that engineering, neuroscience, rehabilitation, coaching and Tai Chi are simply different names for the same thing.

They are different maps.

But sometimes different maps help us explore the same territory.

The book moves from understanding the adaptive human system, through creating conditions for change, towards variability, resilience and adaptable capability.

At its heart remains the question that has followed me throughout this journey:

How can we help human beings organise, develop, maintain and recover their capability throughout life?

Because ultimately, rehabilitation is not simply about restoring a particular movement.

Movement matters because of what it allows us to do.

To stand.

To walk.

To work.

To participate.

To practise.

To play.

To respond when something unexpected happens.

To continue doing the things that give life meaning.

The aim is not perfect movement.

It is a more adaptable human being.

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Human Engineering: A Systems Approach to Movement, Rehabilitation and Human Performance

By Mark Peters

Understand the system. Develop the options. Expand the capability.

Interested in buying a copy of the book?

It is available on Amazon at https://www.amazon.co.uk/dp/B0HKV25MX5