Nervous System Capacity: How to Hold Success & Health | True Nature Nutrition

There is a particular kind of woman I have become increasingly interested in working with.

She is capable, intelligent and ambitious. She has built a successful career, a business or a life that she is genuinely proud of. She knows how to set a goal and make it happen. She can perform under pressure, solve problems quickly and carry considerable responsibility.

From the outside, she is doing exceptionally well.

But internally, life can feel very different.

She may be tired but unable to switch off. She may spend much of her day moving from one demand to another without ever really feeling present. She may be highly disciplined with her work but struggle to create consistency with food, exercise or recovery. She may know exactly what she “should” be doing for her health and still find herself unable to sustain it when life becomes demanding.

This is where the concept of nervous system capacity becomes interesting.

It gives us another way to think about health, performance and sustainability. Rather than asking only what a woman is doing, we can also ask what her body and nervous system currently have the capacity to hold.

Capacity is more than the ability to cope

When we talk about capacity, we often mean how much we can accomplish.

How much work can we get through? How many people can we manage? How much responsibility can we take on? How hard can we train?

But there is another dimension to capacity that receives considerably less attention: our ability to move between activation and recovery.

The human body is designed to respond to demands. Our autonomic nervous system plays an important role in coordinating physiological processes that occur largely outside conscious control, including cardiovascular, respiratory and digestive functions.

When we encounter a demand, our physiology can mobilise. Heart rate and breathing can change, attention can narrow and the body can prepare for action. This response is useful. We need it to exercise, compete, work under pressure and respond to challenges.

The problem is not activation itself.

The problem arises when high levels of demand become the default and recovery becomes increasingly difficult.

A person can become extraordinarily good at operating under pressure while becoming less practised at coming out of it.

That distinction matters.

Polyvagal Theory and the idea of nervous system states

One framework that has contributed significantly to contemporary conversations about the autonomic nervous system is Polyvagal Theory, developed by neuroscientist Stephen Porges.

The theory proposes that the autonomic nervous system contains different pathways and patterns of response associated with states including social engagement, mobilisation and immobilisation. It places particular emphasis on the vagus nerve and on how our physiology responds to cues of safety and threat.

Polyvagal Theory has influenced clinical, therapeutic and wellbeing practices, particularly approaches that work with bodily awareness, breathing, social connection and autonomic state.

It is also important to distinguish the popularity of a theory from scientific consensus. Several researchers have challenged aspects of Polyvagal Theory, including some of its anatomical, evolutionary and neurophysiological claims. Others, including Porges, have responded to these criticisms and continued to develop and defend the framework.

For that reason, I don’t think we need to treat Polyvagal Theory as a perfect map of the human nervous system.

I find it more useful as a lens.

It gives us a language for considering how our current physiological state may influence what feels available to us.

Mobilisation is not the enemy

One of the biggest misconceptions in the nervous system conversation is that sympathetic activation is inherently bad.

It isn’t.

We need activation.

A woman leading a business needs the ability to focus, make decisions, take action and have the capacity for challenge. A woman strength training needs to be able to generate effort. An athlete needs to mobilise. A mother responding to an unexpected situation needs energy and attention.

Activation is part of a healthy, functioning human system.

The goal is therefore not to spend our lives in a state of perfect calm.

The goal is flexibility.

• Can you increase your energy when the situation requires it and decrease it when the demand has passed?

• Can you move from focused work into dinner with your family?

• Can you train hard and then recover?

• Can you experience excitement without interpreting every sensation of activation as a problem?

• Can you rest without feeling that you should be doing something productive?

• Can you experience pleasure without immediately thinking about the next task?

These are questions of capacity.

When achievement becomes a nervous system pattern

This becomes particularly relevant for high-performing women because achievement can itself become a familiar physiological state.

If your life has required constant responsiveness for years, being busy can begin to feel normal.

• Urgency becomes normal.

• Solving problems becomes normal.

• Being needed becomes normal.

• Pushing through fatigue becomes normal.

• Even rest can begin to feel unfamiliar.

This doesn’t necessarily mean that someone is chronically “dysregulated”. The nervous system is considerably more complex than social media infographics suggest.

But it does raise an important question:

What happens when the physiological state that helped you create success becomes the state from which you experience your entire life?

You may become exceptionally effective at producing outcomes while having less capacity for presence, recovery and enjoyment.

And this is where I think our understanding of health needs to expand.

Health is not another performance project

High-achieving women are often very good at turning health into another project.

• There is a target weight.

• A calorie target.

• A training programme.

• A step count.

• A supplement protocol.

• A sleep score.

• A morning routine.

• Another metric to improve.

• Another goal to achieve.

There is nothing inherently wrong with structure or measurable goals. They can be extremely useful.

But when every aspect of health becomes another opportunity to perform, the pursuit of wellbeing can paradoxically become another source of pressure.

This is why I see nutrition, movement and nervous system capacity as complementary rather than competing approaches.

Nutrition provides the foundation for the physiological demands we place on the body. Adequate energy and protein support training, recovery and the maintenance and development of lean tissue.

Strength training develops physical capacity. Walking and other forms of movement support health and allow us to use the body in different ways.

Sleep and recovery provide the conditions in which adaptation can occur.

Breathwork and somatic practices can develop awareness of breathing, bodily sensations and changes in state. Rather than being another set of rules to follow, they can provide an opportunity to notice what is happening internally.

None of this requires us to become obsessed with whether we are “regulated”.

The aim is not another performance metric.

The aim is greater awareness and flexibility.

Building capacity rather than constantly reducing demand

There is another reason I find this concept so valuable.

Much of the conversation around stress focuses on removing things from our lives.

• Work less.

• Do less.

• Say no.

• Take a break.

• Slow down.

These can all be useful.

But they are not always possible, and they are not always the whole answer.

Sometimes the goal isn’t to make your life smaller, sometimes it is to build a body and a set of skills that allow you to meet a bigger life.

That means developing physical strength, eating enough to support the demands you place on your body, learning how to recover, understanding your own patterns, developing greater awareness of bodily state, creating opportunities for rest and connection, and becoming more comfortable moving between effort and recovery.

That is a very different proposition from telling women they need to become less ambitious.

The capacity to hold the life you’ve created

This is ultimately why I am interested in nervous system capacity.

• I don’t want health to require a woman to abandon the ambition that makes her who she is.

• I don’t want success to require her to sacrifice her body, and

• I don’t think wellbeing should become another full-time job.

The goal is something much more integrated.

• A strong body that can meet physical demands.

• A nourished body that has the resources to recover.

• A nervous system that can respond to challenge and return towards recovery.

• A mind that doesn’t need to turn every aspect of life into something to optimise.

• And enough capacity to actually experience the things you have worked so hard to create.

Because perhaps the next level of success isn’t simply being able to do more.

Perhaps it is being able to hold more without losing yourself in the process.

That is what nervous system capacity means to me.

• Not permanent calm.

• Not eliminating stress.

• Not becoming less ambitious.

It is developing the physical, physiological and emotional capacity to meet the demands of your life while still having enough space to experience it.

Because the goal isn’t simply to create a successful life.

The goal is to have the capacity to live it.