The Gap Between Stimulus and Response

When something hits you — an email, a conversation, a moment of stress — your system doesn’t think first.

It reacts.
The fast pathway (your survival response)

• The amygdala detects threat (real or perceived)
• It activates the HPA axis
• You get a surge of:
  – cortisol
  – adrenaline
• Heart rate rises, breathing quickens
• The prefrontal cortex — your rational, measured brain — goes partially offline
  
  This is why reaction feels immediate.
  And often not aligned with who you actually are.

Why this matters more than we think
This is also why I’m intentional about something that seems simple:

I don’t live in my email.
Because every “ping,” every notification, every glance at your phone
is a micro-stimulus.
And your body doesn’t distinguish between:

• a difficult conversation
• and a flashing subject line
  It still activates.
  
  If you are constantly checking — or being pulled into checking —you are keeping your system in a low-grade sympathetic state all day.
  Not a crisis state.
  But a continuous hum of activation.
  Over time, that matters.

A simple shift (that changes your physiology)

Instead of reactive checking →
make it a planned task

• Check your email at set times
• Turn notifications off
• Remove the visual cue (screen down, no pop-ups)

You’re not just improving focus.

You are:

• reducing repeated HPA axis activation
• lowering cumulative cortisol signaling
• allowing your nervous system to return to baseline
  This is physiology — not preference.

The pause is the intervention

That space between stimulus and response?
It’s not philosophical.
It’s biological.
Even a brief pause:

• re-engages the prefrontal cortex
• downregulates the amygdala
• activates the parasympathetic nervous system
• improves vagal tone (your resilience marker)
  
  Recent research continues to show that even short periods of slow, controlled breathing:
• reduce emotional reactivity
• increase heart rate variability
• improve regulation in real time

If you struggle to “pause,” use this instead
At a conference this week, Jay Shetty shared something simple — and surprisingly effective.
A grounding sequence:

Why time feels like it’s speeding up

As we age, people say:
“Time goes faster.”
But time isn’t changing.

We are.

We’ve shifted into:

• task mode
• efficiency mode
• constant doing
  
  And in doing so, we’ve lost:
• observation
• stillness
• sensory engagement

The very things that create memory.
When you are:

• rushed
• distracted
• in sympathetic drive
  
  You don’t encode experience the same way.
  Which creates the illusion that time is moving faster.

The paradox
As we age, we want to:

• slow time
• deepen experience
• extend healthspan
• But the way we’re living:
• • speeds perception
• • fragments attention
• • dysregulates the nervous system

The reframe

You don’t need to do less.
You need to pause within what you’re already doing.
To look up.
To notice.
To feel.
Because in that space:

• your physiology resets
• your brain re-engages
• your nervous system recalibrates

A simple ritual
Before you respond — to anything:

• Inhale for 4
• Exhale for 6
• Repeat 3 times

That alone is enough to:

• increase vagal tone
• reduce reactivity
• restore clarity

Practitioner Picks

To create the conditions for the pause:

Physiologically:

• promotes circulation and relaxation
• reduces sympathetic tone
• supports absorption and recovery
  
  But more importantly:
  it creates a container where the pause is no longer optional

HeartMath

Training the gap

Not just stress management —
this is precision training for regulation
It helps you:

• build awareness of your internal state
• create coherence between breath and heart rate
• insert a pause before reaction
  It’s the measurable version of what we’re practicing.

B-Complex
Support for cognitive load

When you’re constantly reacting and switching tasks,
you increase demand on your nervous system.
B vitamins support:

• energy production
• neurotransmitter function
• cognitive resilience
  Not a stimulant —
  but support for the systems carrying the load.

Sublime Life Vital Omega (High EPA/DHA)

Stability at the level of the brain

If the pause is about reducing reactivity,
this supports the structure behind it.

Omega-3s:

• improve neuronal signaling
• reduce neuroinflammation
• support mood and emotional regulation
  Think of this as:
  stabilizing the terrain so you’re less easily pulled into reaction

✦ Ritual: Scheduled Disconnection

• Email at set times
• Notifications off
• Phone face down
  Simple.
  
  But profoundly effective.

Closing

The pause is not passive.

It is the moment your biology comes back online.

Dr. Kathryn Dundas, MD, CCFP
Founder, Medical Director Sublime Life
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