Why You Can’t Calm Down: Fight or Flight vs Rest and Digest
Recognizing Your Body’s Response
Have you ever been on a Zoom call, everything under control, yet your chest tightens, your stomach knots, or your heart races? You may think, “I just need to calm down”, but telling your body to relax doesn’t work — and that’s because your nervous system isn’t listening to logic. It’s listening to survival.
The human nervous system is wired to protect us. When it perceives threat — whether conscious or subconscious — it triggers fight or flight, mobilizing energy to respond. This involves:
Rapid heartbeat
Faster, shallower breathing
Muscle tension
Heightened alertness
Narrowed focus
Even when the danger is only imagined or mild, the body responds as if your life depends on it.
Fight or Flight vs Rest and Digest
The autonomic nervous system has two main branches:
Sympathetic Nervous System (Fight or Flight): Prepares your body to respond to threat by increasing heart rate, tensing muscles, and sharpening focus.
Parasympathetic Nervous System (Rest and Digest): Promotes calm, digestion, and restoration.
Under chronic stress or trauma, the balance between these systems can shift. Your baseline may tilt toward constant alert, making it hard to relax even in safe environments. You may experience:
Difficulty falling asleep
Muscle tension or chronic aches
Irritability or emotional sensitivity
Feeling “on edge” without knowing why
Understanding that your body is doing exactly what it’s designed to do — keeping you safe — is the first step toward self-compassion and awareness.
What Science Tells Us
Polyvagal Theory (Stephen Porges) helps explain these responses. The vagus nerve communicates between the brain and body, signaling safety or danger. When safety signals are low or absent, the body stays activated.
Similarly, the HPA axis regulates stress hormones like cortisol. Repeated stress keeps cortisol levels elevated, maintaining your nervous system in overdrive. These biological patterns explain why mental strategies like “just calm down” often fail — regulation has to start in the body first.
Relatable Everyday Scenarios
Think about common situations:
Your chest tightens before sending a big work email, even though you know it’s routine.
You’re walking into a social gathering, and your stomach knots or your thoughts spiral, even though you want to relax.
You wake up in the morning already feeling tense, anxious, or restless, without a clear trigger.
These are all nervous system responses, not failures of character. Recognizing the pattern is key: your body is trying to protect you.
Practical Strategies for Regulation
Even if you can’t “turn off” fight or flight instantly, you can train your nervous system to shift toward rest and digest over time. Some evidence-based strategies include:
Breathwork
Slow, deep diaphragmatic breathing signals safety to the vagus nerve.
Try inhaling for 4 counts, holding for 4, exhaling for 6.
Grounding Exercises
Engage your senses: notice what you see, hear, feel, and smell.
Helps redirect attention from anxious thoughts to present sensations.
Movement & Stretching
Gentle exercise releases tension and helps regulate stress hormones.
Yoga, walking, or stretching can stimulate the parasympathetic system.
Mindfulness & Body Awareness
Notice areas of tension or activation without judgment.
Label your physiological responses (“My chest feels tight; my shoulders are tense”). Awareness itself reduces stress reactivity.
Scheduled Micro-Breaks
Short pauses throughout your day reduce cumulative stress and help prevent sympathetic dominance.
Reflection Questions
To better understand your body’s stress responses, consider:
When do I notice my body activating before I consciously feel anxious?
Which parts of my body hold tension most often?
How do my thoughts and emotions respond to these sensations?
What small daily strategies help me feel more grounded?
Journaling answers to these questions can illuminate patterns and create opportunities for regulation.
Moving Toward Balance
Understanding fight or flight isn’t just theory — it’s a roadmap to self-awareness and practical change. Chronic activation doesn’t indicate weakness; it reflects a nervous system trained for survival. By observing patterns, experimenting with body-based strategies, and building awareness, you can shift toward rest, calm, and clarity.
Even from home, across Alberta or locally in Edmonton, you can integrate these approaches into daily life — because regulation is a skill, not a switch.