You’re Trying to Change Too Fast for Your Nervous System
If you keep starting strong and then falling off your habits, this isn’t a discipline problem. It’s your nervous system. In this post, I break down the psychology behind why change feels so hard, how your subconscious drives your behaviour, and how to finally build consistency in a way that actually lasts.
Table of Contents
Introduction
Let’s play a game of put your finger down if…
Put your finger down if you’ve ever said you want to do something new…
You put it in your diary, you commit, you show up for a few weeks…
And then suddenly it starts to feel overwhelming.
Other things take priority.
You decide it’s “not that important anyway”…
You quit.
You feel guilty.
And before you know it, you’re right back where you started.
…yeah, same.
Why You Keep Falling Off Habits (It’s Not a Discipline Problem)
Whenever we decide to change something in our lives, we usually start off highly motivated. We feel good about ourselves. We feel in control.
But then the momentum fades.
And what we’re left with is something most people completely overlook:
A triggered nervous system trying to pull us back to safety
Because here’s the thing…
To your nervous system and subconscious mind:
safety = familiarity
Not success.
Not happiness.
Not your dream life.
Just what’s familiar.
The psychology behind it (in simple terms)
As children (and throughout our lives), we learn behaviours based on what we believe will keep us safe.
This idea is grounded in Attachment Theory, originally developed by John Bowlby, which explains how early relationships shape our sense of safety, behaviour, and emotional responses.
For example:
If showing emotion was met with dismissal, we may learn that expressing feelings isn’t safe. So we adapt. We suppress. We stay “easy”.
At the time, this is intelligent.
We literally rely on others to survive.
But when a behaviour is repeated, your brain strengthens the connection between
Action = Outcome
This is supported by principles of Hebbian Theory, often summarised as “neurons that fire together, wire together”
Over time, this becomes automatic. A belief.
A default setting.
And while these behaviours once protected you…
They can become limiting in adulthood.
Why this matters for habits
Let’s use a common example:
“I want to start exercising.”
If you’ve tried multiple times and stopped multiple times, it’s very likely your system has learnt something like:
- “I’m not an active person”
- “I’m not good at exercise”
- “I never stick to this”
Even if you don’t consciously think these things, they still shape your behaviour.
Because if being inactive is what’s familiar then your nervous system has labelled that as safe
So when you suddenly start going to the gym?
Your system flags it as:
“This is unfamiliar. This might not be safe.”
And it responds accordingly:
- Overwhelm
- Avoidance
- Loss of motivation
- Procrastination
- Suddenly being “too busy”
Not because you’re lazy.
Because your body is trying to protect you.
How Your Brain Learns “Safe” Behaviours (And Why That Matters)
“But it’s just the gym… why does it feel so deep?”
I get it. It sounds dramatic.
But resistance usually has roots.
From a learning perspective, this can be understood through Classical Conditioning and Operant Conditioning, pioneered by Ivan Pavlov and B. F. Skinner.
If exercise has been paired with emotions and states such as embarrassment, punishment, pain or failure…
Your brain learns to associate it with something negative.
So of course your body resists it.
Some common experiences that can shape your relationship with exercise include:
- Being shamed about your body growing up
- Exercise being used as punishment
- Repeated cycles of starting and “failing”
- Being labelled “unathletic”
- Associating movement with dieting or restriction
- Past injury or physical pain
- Feeling judged, watched, or uncomfortable in your body
- Negative experiences in PE or group sports
- All-or-nothing or perfectionist environments
- Being pushed too hard, too fast in the past
These experiences don’t just disappear.
Your body remembers.
And research suggests that past experiences are stored not just cognitively, but physically – influencing how we respond to situations in the present.
So… are we just stuck like this?
No.
Phew!
This is where it gets exciting.
Research on Neuroplasticity shows that your brain is capable of change.
You can create new neural pathways.
You can shift your default settings.
But – and this is the part most people miss:
You can’t just think your way into new behaviour
.
You have to bring your nervous system with you.
What your nervous system is actually doing
Your nervous system is constantly scanning for safety.
This process – called neuroception – was introduced by Stephen Porges through the Polyvagal Theory.
It happens automatically.
Before logic, motivation or discipline kicks in.
It has three main states:
Regulated (safe): calm, focused, open to action
Fight/Flight (activated): anxious, overwhelmed, avoidant
Freeze (shutdown): stuck, numb, unmotivated
When you try to change a habit, your nervous system doesn’t ask:
“Is this good for me?”
It asks:
“Is this familiar?”
If the answer is no… it creates resistance.
This is why you “fall off”
You’re not inconsistent.
Research in social psychology by John A. Bargh and Tanya L. Chartrand suggests that a large proportion of our daily behaviour is automatic and unconscious.
Which means:
You’re trying to consciously override patterns that are running automatically.
So you might:
Start strong
Stay consistent for a few weeks
Then suddenly feel overwhelmed and stop
Not because you failed.
Because your system pulled you back to what feels safe.
If you want real, lasting change, you need to work with your nervous system, not against it.
Here’s how:
1. Start smaller than you think
Start smaller than your ego wants. This aligns with behaviour change research like Self-Efficacy Theory by Albert Bandura.
Small wins build belief.
Belief builds action.
2. Prioritise safety over intensity
Sustainable change is more likely when behaviours feel achievable and low-threat.
3. Regulate before you act
You can’t build consistent habits from a disregulated state.
4. Build evidence slowly
Every small follow-through reinforces identity.
5. Don’t personalise resistance
Resistance is information, not a character flaw.
6. Use repetition to create safety
Repetition is what wires new patterns.
Conclusion
The goal isn’t to force yourself into a new life overnight.
It’s not to suddenly become “that girl” who wakes up at 5am, journals, works out, eats perfectly and never misses a day.
Because if your nervous system isn’t on board?
That version of you won’t stick.
The real goal is this:
To make your new behaviours feel safe enough to repeat.
Because when your nervous system feels safe:
You stop relying on motivation
You stop needing constant discipline
You stop swinging between extremes
And instead…
You become consistent.
And this is where identity starts to shift.
According to self-perception theory by Daryl Bem:
We form our identity by observing our own behaviour.
So instead of:
“I’ll believe it when I become consistent”
It becomes: “I become consistent because I see myself showing up”
This concept is also backed by habit research by Phillippa Lally (2009), which shows habits form through repetition, not intensity.
And from a neuroscience perspective…
Thanks to neuroplasticity, your brain adapts based on what you repeatedly do.
What once felt unfamiliar… becomes normal. What once felt unsafe… becomes safe.
So identity isn’t something you force
It’s something you build.
Through:
Safe repetition
Regulated action
Small, consistent proof
The bottom line?
You’re not lazy. You’re not undisciplined. You’re not broken.
You’re trying to build a new life with a nervous system that hasn’t caught up yet.
And when you stop fighting it… and start working with it?
That’s when everything changes.