Understanding Your Window of Tolerance: Why You Feel Calm Some Days and Completely Overwhelmed on Others (Part 1).
understanding your window of tolerance
Have you ever had one of those days where everything seems manageable? The traffic doesn’t bother you, the kids are noisy but you cope, work is busy but you get through it and even when something unexpected happens, you take a deep breath and carry on.
Then there are other days.
Someone cuts you off in traffic and you feel irrationally angry. Your phone rings one too many times and suddenly you want to throw it across the room. A simple conversations with your partner turns into an argument. You burst into tears over something that wouldn’t normally upset you, or perhaps you find yourself shutting down completely and wanting everyone to leave you alone.
It can feel confusing. You might even wonder what’s wrong with you.
The answer is probably…nothing.
What you’re experiencing may simply be your nervous system telling you that you’ve moved outside what’s know as your Window of Tolerance.
Once you understand this concept, many confusing moments begin to make sense.
what is the window of tolerance?
The term Window of Tolerance was developed by psychiatrist Dr Dan Siegel to describe the zone where our nervous system feels balanced and regulated.
Think of it like the ‘sweet spot’ where your brain and body work well together.
Inside your window, you’re able to:
Think clearly
Make decisions
Solve problems
Listen to others
Regulate your emotions
Feel connected to yourself and the people around you
Recover from stress without falling apart
Life doesn’t suddenly become easy inside your window.
Stress still happens.
People still disappoint you.
Children still wake up during the night.
Your workload is still demanding.
The difference is that your nervous system has enough capacity to cope.
You’re responding rather than reacting.
Your window isn’t fixed
One of the biggest misconceptions is that your Window Of Tolerance stays the same every day.
It doesn’t.
Think about your phone battery.
When it’s sitting at 100% you can stream videos, answer calls, browse the net and use multiple apps without worrying.
When it’s sitting at 8% every notification feels irritating.
You start conserving energy.
You become selective.
Your nervous system works in much the same way.
After a good night’s sleep, regular meals, movement, supportive relationships and some downtime your window often becomes wider.
You’re more resilient.
But after weeks of poor sleep, workplace stress, caring responsibilities, relationship conflict, illness, hormonal changes or grief, your window naturally narrows.
It takes far less to push you outside it.
That doesn’t mean you’ve failed.
It means you’re human.
what happens when you leave your window?
Generally speaking, we move in one of two directions.
Hyperarousal -When Everything Feels Too Much
This is your body’s fight-or-flight response.
You may notice:
racing thoughts
anxiety
irritability
feeling overwhelmed
snapping at loved ones
muscle tension
a racing heart
difficulty concentrating
wanting to control everything
Many women describe it as feeling ‘wired but exhausted’.
Hypoarousal - When You Shut Down
The opposite can also happen.
Instead of feeling overwhelmed, you feel…nothing.
You may notice:
numbness
exhaustion
withdrawing from others
procrastination
feeling disconnected
low motivation
brain fog
wanting to stay in bed
feeling emotionally flat
People often mistake this for laziness.
It isn’t.
It’s another protective response from the nervous system.
Your body is trying to conserve energy because it believes you’ve reached your limit.
how does it feel when you’re inside your window?
Most of spend so much time talking about stress that we forget to recognise what regulation actually feels like.
Inside your window you might notice:
You can pause before reacting, instead of responding
You can hear someone else’s perspective without immediately becoming defensive
You feel present in conversations instead of mentally rehearsing what you’ll say next
You recover more quickly after something stressful
You laugh more easily
You sleep better
You remember things
You make decisions with less second-guessing
Most importantly, you feel like yourself
Not perfect…just yourself
learning to notice your own signs
Every nervous system speaks a lightly different language.
Part of building emotional wellbeing is learning to recognise your own early warning signs:
Perhaps you become short-tempered.
Perhaps you stop answering messages
Perhaps you suddenly become busy and can’t sit still
Perhaps you start comfort eating
Perhaps your shoulders slowly creep towards you ears without you even noticing
None of these signs are ‘bad’.
They’re information.
Instead of asking ‘What’s wrong with me?’ try asking ‘What is my nervous system trying to tell me?’
That one small shift can completely change how you respond to yourself.
curiosity over criticism
Many women have spent years criticising themselves for feeling ‘too emotional’, ‘too sensitive’ or ‘not coping’.
But what if your nervous system has simply been working overtime?
What if those reactions aren’t evidence that you’re failing but evidence that you’ve been carrying too much for too long?
Imagine treating yourself with the same curiosity you would offer a close friend.
You probably wouldn’t tell her she was hopeless but ask what she’d been dealing with and express that you wondered how she’d been holding it all together.
You deserve the same kindness.
a gentle reflection
Before you finish reading today, I’d like to leave you with a few questions:
When do you feel most like yourself?
What situations consistently leave you feeling overwhelmed?
What helps you feel grounded again?
Have you noticed certain people, places or responsibilities that narrow your window?
What fills your emotional battery rather than draining it?
There are no right or wrong answers.
This is simply the beginning of becoming more aware of your own nervous system.
Because awareness always comes before change.
helpful resources
Beyond Blue (Australia) - Information on anxiety, stress management and mental wellbeing
Centre for Clinical Interventions (CCI) Western Australia - Free resources
This Way Up - Online CBT programs
Head to Health - Government supported mental health information and services
Black Dog Institute - Resources on stress, resilience and emotional regulation
coming in part two
In the next blog we’ll explore practical ways to gently widen your Window of Tolerance.
We’ll look at simple grounding techniques, mindfulness, boundaries, recognising triggers and why learning to say ‘no’ is sometimes one of the most powerful forms of nervous system regulation there is.
