The Physiology of Chronic Vigilance
Individuals who experience sustained identity-based discrimination often exist in a state of physiological hypervigilance. The autonomic nervous system — which governs unconscious bodily functions including heart rate, respiration, digestion, and stress hormone release — becomes chronically tilted toward the sympathetic (fight-or-flight) branch. This is not a choice. It is a physiological adaptation to an environment perceived as threatening.
Research on the health effects of chronic discrimination supports this observation. Clark et al. (1999) demonstrated that perceived racial discrimination is associated with elevated cardiovascular reactivity. Williams and Mohammed (2009) documented the relationship between chronic discrimination exposure and allostatic load — the cumulative physiological wear of sustained stress. The body, exposed to repeated social threat, adjusts its baseline accordingly.
The consequence is a nervous system that does not return to rest. Heart rate remains elevated. Cortisol levels stay high. Sleep architecture is disrupted. The capacity for emotional regulation is compromised, because regulation requires a baseline of physiological calm from which to operate — and that baseline has shifted.
Within CROWN’s 360° Integrative Mind-Body Therapeutic Protocol, created by Yanina Soumaré, breathwork addresses this physiological dimension directly.
What Breathwork Does
Breathwork — specifically, structured breathing practices derived from the pranayama tradition — is one of the most direct and accessible methods for influencing autonomic nervous system function. The mechanism is well understood: the vagus nerve, which connects the brainstem to the heart, lungs, and digestive organs, responds to respiratory patterns. Slow, rhythmic breathing with extended exhalation activates the parasympathetic branch of the autonomic nervous system, promoting physiological calm.
This is not a theoretical claim. It is established physiology. A comprehensive review by Zaccaro et al. (2018) in Frontiers in Human Neuroscience documented the effects of slow breathing techniques on autonomic function, demonstrating measurable changes in heart rate variability (HRV), blood pressure, cortisol levels, and self-reported anxiety following controlled breathing interventions.
Additional evidence includes:
- Ma et al. (2017): A randomised controlled trial demonstrating that diaphragmatic breathing significantly reduced cortisol levels and improved sustained attention in healthy adults.
- Novaes et al. (2020): A systematic review documenting the effects of yogic breathing on emotional regulation and psychological well-being across multiple clinical populations.
- Brown and Gerbarg (2005): Clinical evidence for Sudarshan Kriya Yoga (a structured breathing practice) in the treatment of depression, anxiety, and PTSD in both civilian and military populations.
How CROWN Applies Breathwork
Within the 360° Protocol, breathwork serves three distinct functions:
Autonomic Regulation
The primary application of breathwork is the restoration of autonomic balance in individuals whose nervous systems have adapted to chronic discrimination stress. This is not a one-time intervention but a practiced skill that, with regular use, progressively shifts the autonomic baseline toward greater parasympathetic tone.
The protocol uses coherent breathing — a pattern of equal-duration inhalation and exhalation, typically at a rate of five to six breaths per minute — as the foundation. This breathing rate has been identified in research as optimal for heart rate variability coherence, indicating a balanced, flexible autonomic nervous system (Lehrer and Gevirtz, 2014).
Over time, regular coherent breathing practice produces measurable changes: resting heart rate decreases, heart rate variability increases, cortisol awakening response normalises, and self-reported stress levels decline. These are not subjective impressions; they are quantifiable physiological shifts.
Session Preparation
Each session of the 360° Protocol begins with a structured breathwork practice. The purpose is pragmatic: the cognitive work of CBT, the somatic awareness of yoga therapy, and the emotional processing of the emerging-evidence modalities all function more effectively when the individual begins from a state of relative physiological calm.
Attempting to restructure cognitive patterns while the sympathetic nervous system is activated is like trying to have a nuanced conversation while running from a threat — the cognitive resources required are occupied by survival-oriented processing. Breathwork creates the physiological conditions in which deeper therapeutic work becomes possible.
Self-Regulation Skill
Unlike most components of the 360° Protocol, which require a clinical setting and trained practitioner, breathwork is a self-regulation skill that clients can practise independently between sessions and after the formal treatment programme concludes. This portability is therapeutically significant.
An individual who has learned coherent breathing can deploy it in real time — before a job interview where past discrimination has created anticipatory anxiety, during a workplace encounter that triggers a stress response, or at night when rumination disrupts sleep. The breath is always available, requires no equipment, and can be practised without others’ awareness.
The protocol teaches breathwork not only as a therapeutic intervention but as a lifelong self-regulation tool.
Specific Techniques in the Protocol
The 360° Protocol incorporates several breathwork techniques, selected for their evidence base and their applicability to the discrimination-specific stress patterns described above:
Coherent Breathing. Equal-duration inhalation and exhalation at five to six breaths per minute. The foundational practice of the protocol. Targets heart rate variability coherence and overall autonomic balance.
Extended Exhalation. Inhalation for four counts, exhalation for six to eight counts. The lengthened exhalation directly stimulates the vagus nerve, promoting parasympathetic activation. Particularly effective for acute anxiety management.
Diaphragmatic Breathing. Conscious engagement of the diaphragm rather than the accessory respiratory muscles. Many individuals in chronic stress states develop shallow, chest-dominant breathing patterns that perpetuate sympathetic activation. Diaphragmatic breathing retrains the respiratory pattern.
Box Breathing. Equal-duration inhalation, hold, exhalation, and hold (typically four counts each). Used in specific protocol segments where a structured, predictable rhythm supports emotional grounding during challenging therapeutic content.
Expected Outcomes
Participants in the breathwork component of CROWN’s 360° Protocol can expect:
- Reduced resting heart rate and improved heart rate variability
- Decreased cortisol levels and improved cortisol rhythm
- Reduced self-reported anxiety and physiological arousal
- Improved sleep quality and reduced rumination
- A portable self-regulation skill for managing discrimination-related stress in daily life
- Enhanced capacity for engagement with other protocol modalities
These outcomes are evaluated as part of CROWN’s clinical validation programme, which includes both physiological measurements (HRV, cortisol) and validated self-report instruments.
Within the 360° Protocol
Breathwork occupies a unique position within the 360° Protocol. It is both a therapeutic modality in its own right and a facilitating practice that enhances the efficacy of every other modality. CBT works better when the nervous system is regulated. Yoga therapy is more effective when breathing is conscious and controlled. EFT and TRE require a physiological baseline from which to work.
In this sense, breathwork is the foundation upon which the entire protocol rests: the simplest intervention with the most pervasive effect.