Breath Holding and the Fight or Flight Response

A person meditating outdoors with a calm expression, sitting cross-legged in a striped shirt and shorts.

Introduction: Taking Control with Breath Holding

underwater meditation

When we feel overwhelmed in a situation, often included is a racing heart and racing thoughts. This is our body’s physiological fight or flight response—it is hardwired into our biology as a survival mechanism. But what you may not know is that breath holding can be a surprisingly facile and efficient way to take control when it does.

In this article, we deep dive into the relation between breath holding and the fight or flight response and show how deliberation in breathing can deny feelings of panic, reduce adrenaline spikes, and produce calm.


Grasping the Fight or Flight Response

What is the Fight or Flight Response?

Fight or flight is a way your body gears up to face the threat. This is like an avalanche of physiological changes triggered by the release of stress hormones, which are basically adrenaline and cortisol. The changes include:

  • Increased heart rate and blood pressure
  • Rapid breathing, or hyperventilation
  • A sharp heightening of alertness and energy
  • Suppression of non-essential functions such as digestion

This response is lifesaving under dangerous conditions but also a problem when it is inappropriately activated during events like public speaking or a traffic jam.


The Impact of Breath Holding on Stress Responses

How Breath Holding Affects the Fight or Flight Response

Holding one’s breath might seem counterintuitive on its face—after all, aren’t we stressed and thus in greater need of oxygen? But the relationship between breathing and the autonomic nervous system is more complex than it appears.

Breath Control Signals Safety
Holding your breath deliberately during stress sends a signal to your brain that you’re not in immediate danger. This disrupts the cycle of rapid breathing and physiological arousal, shifting the body toward the parasympathetic nervous system, which promotes relaxation.

Reduces Overbreathing (Hyperventilation)
This hyperventilation in stress drops the levels of carbon dioxide, CO2, in the blood, which in turn can make a person feel dizzy or tingling and creates panic. Breath holding regulates the levels of CO2 in the body, thus grounding the body.

An illustration of a heart with a fluctuating heartbeat waveform, symbolizing heart rate variability.

Direct Impact on HRV
Breath holding results in a slowing down of the heart rate, thus enhancing heart rate variability, which is an important signature of emotional and physical resilience.


The Science of Stress Reduction Through Breath Holding

Breath Holding to Study the Science of Stress Reduction

Research has also shown that controlled breathing—including holding one’s breath—can impact the hypothalamic-pituitary-adrenal axis, which controls the body’s fight or flight response. Let’s break it down:

  • Decreased Cortisol Levels: Studies indicate that practices focusing on the breath lower cortisol levels, the principal stress hormone.
  • Stimulates the Vagus Nerve: Holding one’s breath activates the vagus nerve, which directly slows the pulse and fosters a relaxed state.
  • Increases Oxygen Efficiency: Short-term retention of breath teaches the body to make better use of oxygen, which leads to calmness even in stressful situations.

Practical Applications of Breath Holding

CO2 Tolerance Training

How to do it:

  • Take a deep breath in, then out completely. For as long as possible, hold the breath in comfortably.
  • Do 5-10 repetitions, increasing each time the length of holding the breath.

Why it works: This builds resilience by way of improving CO2 tolerance, preventing hyperventilation from panic.

When to Employ Breath Holding for Stress

  • Prior to the moment of truth: Holding your breath, in a controlled manner, of course, before that big presentation may relax you.
  • At any moment of high anxiety: Stop at any time when panic is welling up and try a short breath-hold, compose yourself immediately.
  • In your downtime: After an argument or strenuous interaction, breath holding resets your system.

The Role of Carbon Dioxide in Breath Holding

CO2 Molecyle

Carbon Dioxide and Stress Management

Carbon dioxide always gets a bad rap; it is actually important for physiological balance. Stress results in excessive exhalation of CO2 by shallow breathing—which precipitates symptoms such as lightheadedness and tachycardia.

Breath holding rebalances CO2 levels, thereby serving to:

  • Enhance the delivery of oxygen to tissues via the Bohr effect
  • Calm excessively excited neurons of the brain
  • Stabilize the cardiovascular system

Why Practice Breath Holding Regularly?

Benefits of Regular Breath Holding Practice

  • Improved Stress Resilience: Through regular practice, your ability to maintain calm under pressure gets honed.
  • Better Focus and Concentration: Deliberate control over breathing sharpens the mind.
  • Enhanced Emotional Regulation: Breath holding instills a sense of control over your emotions.
  • Physical Health Benefits: It reduces blood pressure, reduces inflammation, and promotes good heart health.

Psychological Effects of Breath Holding:
In addition to the physiological effects, breath holding can also have psychological implications. It may help individuals feel a sense of control and empowerment in stressful situations, as well as enhance concentration and mental clarity.

Potential Benefits of Breath Holding in the Fight or Flight Response:
Some studies suggest that controlled breath holding techniques, such as those used in practices like yoga and meditation, can help regulate the fight or flight response. These techniques may promote relaxation, reduce anxiety, and improve overall well-being.

Risks and Precautions:
While breath holding can have potential benefits, it is important to note that excessive or prolonged breath holding can be dangerous. It may lead to oxygen deprivation, loss of consciousness, and other adverse effects. Therefore, it is

Real-Life Scenarios: Applying Breath Holding to Manage Stress

Public Speaking
Imagine being ready to speak to a big audience. Your heart beats faster, your palms are sweating, and your fight or flight response starts. Holding your breath for a couple of seconds will reset your nervous system and help you be confident in speaking.

Conflict Resolution
In heated discussions, emotions spiral, and a strategic breath hold buys time for regaining emotional control while communicating thoughtfully.

Sports and Physical Challenges
Most sportsmen have applied different breath-holding techniques to achieve peak performance and maintain focus and composure during stressful periods.


Dispelling Misconceptions About Breath Holding

Common Myths About Breath Holding

Myth 1: Breath holding is dangerous.

  • Fact: In a correct context and within safe limits, breath holding is totally harmless and very useful for one’s good.

Myth 2: It is only for advanced practitioners.

  • Reality: Basic breath-holding practices can be performed by anyone, with any level of experience.

FAQs: Breath Holding and Stress Management

  • What happens to breathing during fight or flight?
    During the fight or flight response, breathing becomes faster and shallower to increase oxygen intake, preparing the body for quick action. This helps fuel muscles and boosts energy to respond to a threat.
  • How does breath holding impact the nervous system?
    Breath holding has an effect on the autonomic nervous system by stimulating the parasympathetic branch, opposing the stressful fight or flight response.
  • Can anyone hold their breath?
    Yes, everyone can hold their breath using proper techniques and safety precautionary measures to reduce stress and enhance resilience.
  • For how much time can I hold my breath while stressed?
    Start with brief breath holds of 5 to 10 seconds and increase gradually as you become comfortable. Listen to your body and avoid overexertion.
  • Are there risks associated with breath holding?
    Minimal risks if one does exercises within one’s limits and avoids extreme breath-holding. Consult a doctor in case of preexisting health conditions.
  • Does breath holding improve focus?
    Yes, the holding of the breath calms the mind, and the emotions become balanced and concentrated, providing clear mental perception, hence helping with focusing.

Conclusion: Breath Holding as a Tool for Resilience

The interrelationship of breath holding with the fight or flight response serves as further testimony to the power of the breath in setting our physical and emotional states. Hence, mastery of simple techniques such as box breathing and CO2 tolerance training will allow one to change responses to stress and nurture calm and control even in really tough moments.

Breath holding isn’t just a survival mechanism; it is for resilience, clarity, and empowerment. Start integrating these techniques into your life and begin to see for yourself the amazing changes in your life with intentional breathing.


Breatheology Courses

Breatheology offers courses designed to help you reduce stress, boost resilience, and enhance mental clarity through breathwork. Whether you’re just starting or want to deepen your practice, we have a program for you.

Available Programs:

Take a deep dive into the art of conscious breathing with Breatheology Discovery! In just a few days, you’ll learn easy yet powerful techniques to improve your health, reduce stress, and calm your mind. Start your journey to a healthier, more relaxed life, one breath at a time.

Ready to push your boundaries? The Breath Hold Challenge will teach you how to hold your breath up to three minutes, reduce stress, and enhance mental toughness. Plus, invite friends and compete for exclusive rewards. Challenge yourself and see how powerful your breath can be!


Sources & References

Impact on Cortisol Levels:

  • Studies have shown that controlled breathing, including breath holding, reduces cortisol levels and mitigates stress responses by affecting the hypothalamic-pituitary-adrenal (HPA) axis (Ma et al., 2017).
  • Similar effects on salivary cortisol reduction were observed after physical stress in yoga-based breath control techniques (Monnazzi et al., 2002).

Vagus Nerve Stimulation:

  • Activation of the vagus nerve during breath holding induces parasympathetic dominance, leading to relaxation and reduction in heart rate (Hood et al., 2006).

Heart Rate Variability (HRV):

  • Breath holding improves HRV, a marker of emotional resilience, by slowing heart rate and modulating autonomic balance (Liu et al., 2002).

CO2 and Oxygen Efficiency:

Brain Activation and Regulation:

  • Functional MRI studies show that breath holding activates specific brain regions, including those involved in response inhibition, which can help interrupt the cycle of stress (McKay et al., 2008).

HPA Axis Modulation:

  • Breath holding influences the HPA axis, reducing stress by modulating the release of cortisol and other stress hormones (Russell & Lightman, 2019).

Physiological Reset via CO2 Regulation:

Controlled breath holding balances CO2 levels, which stabilizes cardiovascular and neurological function, helping to counteract hyperventilation-induced stress (Djarova et al., 1986).