What neuroscience reveals about how breathwork transforms the body’s stress response into calm presence.
Breathwork has moved from ancient wisdom to scientific investigation. Long used in ancient traditions, conscious connected breathing is now being studied in neuroscience labs, and the results are remarkable. Recent research reveals that rhythmic, intentional circular breathing can measurably alter brain blood flow, emotional processing, and nervous system activity, offering a natural pathway to healing and regulation.
At Yoga Circle Vancouver, we’ve witnessed these changes firsthand during our monthly Breathwork Circles. Participants often describe profound calm, emotional release, and moments of insight. Science is now beginning to explain why.
From Ancient Practice to Scientific Affirmation
In 2025, a team of researchers published a study in PLOS ONE titled “Neurobiological substrates of altered states of consciousness induced by high ventilation breathwork accompanied by music.”
Using advanced brain imaging (MRI) and heart rate variability (HRV) monitoring, the researchers explored what happens in the body and brain during the kind of breathwork we practice at Yoga Circle — a rhythmic, high-ventilation pattern accompanied by evocative music.
Participants experienced what psychologists call Altered States of Consciousness (ASCs) — not unlike deep meditation, ecstatic dance, or psychedelic-assisted therapy — but achieved naturally, through breath.
The study’s findings bridge modern neuroscience with timeless inner practices.
What the Brain Reveals During Breathwork
MRI scans showed profound, measurable shifts in regional cerebral blood flow (rCBF), a marker of how active or oxygenated specific brain areas are.
Here’s what was discovered:
- Decreased blood flow in the posterior insula and parietal operculum, regions linked to interoception, the brain’s internal map of the body.
➤ This is part of why people often feel “bigger than their body,” “connected to everything,” or “free from physical limits” during deep breathwork. - Increased blood flow in the right amygdala and anterior hippocampus, regions tied to emotion, memory, and learning.
➤ This supports emotional release and memory integration, the very processes people often describe as healing or cathartic. - Participants who reported the strongest feelings of unity and peace, a state scientists call Oceanic Boundlessness, also showed the most pronounced brain changes in these emotional and interoceptive regions.
Simply put: breathwork helps deactivate areas linked to self-separation and activate areas that process emotional connection.
What Happens in the Body
While the brain reorganizes its activity, the body mirrors this transformation.
The researchers tracked heart rate variability (HRV), a measure of how well the nervous system can shift between activation and relaxation. During the active phase of breathwork, participants entered a sympathetic state, the same system that activates during exercise or emotional release. But after the session, there was a strong parasympathetic rebound, the system responsible for rest, digestion, and healing.
In essence:
The breath first awakens, then releases, then restores.
This physiological rhythm is key. Many modern people live in chronic sympathetic activation (fight-or-flight) without completing the cycle. Breathwork provides a safe, intentional container for this mobilization, allowing the body to finally release stored tension and shift back into balance.
Why Activation Supports Healing
At first, it may sound counterintuitive that activating the sympathetic nervous system (the “stress” branch) can promote healing. But when guided safely, this activation has a therapeutic function.
- Mobilizing energy: It helps the body discharge survival responses that were frozen or incomplete.
- Bringing awareness: It brings subconscious material to the surface, sensations, memories, emotions.
- Creating flexibility: Moving between sympathetic and parasympathetic states trains the nervous system to adapt, not stay stuck.
In somatic therapy, this process is known as completion of the stress cycle. In plain language, it’s “feeling it to heal it” with neurobiological support.
The Breath-Brain Connection
Why does breathing have such a direct influence on the brain?
Each breath you take is a signal, a conversation between your lungs, heart, vagus nerve, and limbic system.
Fast, deep breathing changes blood chemistry (lower CO₂, shifts in pH), which in turn affects brain blood flow and neural firing patterns. It also stimulates vagal afferents, the communication fibers that connect the body to emotion centers in the brainstem.
This is why altering your breath can alter your state of consciousness so rapidly. In the PLOS ONE study, these physiological changes were visible on MRI and measurable in emotional reports.
The researchers concluded that breathwork can induce neural patterns similar to those seen in psychedelic therapy but through a non-pharmacological, accessible practice.
From Science to Experience: Breathwork at Yoga Circle
At Yoga Circle, these findings align beautifully with what we witness in community breathwork sessions.
During the early stages of breathing, participants may feel tingling, warmth, or waves of emotion, the activation phase. As the journey unfolds, music and guidance help the nervous system find rhythm and flow, the expression phase. Finally, breath slows, the body softens, and the mind becomes still, the integration phase.
Each person’s experience is unique, but the common thread is this:
A movement from holding to release, from contraction to openness.
While science maps the neural and biochemical shifts, lived experience gives it meaning, connection, clarity, peace, and a sense of inner coherence.
Why This Matters for Health
From a naturopathic and functional medicine perspective, nervous system flexibility is one of the strongest predictors of resilience. Chronic stress, inflammation, and trauma can narrow this flexibility. Breathwork offers a natural intervention to reopen those pathways.
Potential benefits observed in both clinical and community contexts include:
- Reduced anxiety and rumination
- Improved emotional regulation
- Enhanced interoceptive awareness (body–mind connection)
- Improved HRV and stress recovery
- Greater sense of connection and meaning
As the research continues, it’s becoming clear that breathwork isn’t only a spiritual or emotional practice, it’s also a neurobiological one.
Bridging Science and Spirit
Modern science gives us the language, brain regions, neurotransmitters, heart rate variability, but the essence of the work remains timeless. Breath is the bridge between the physical and the intangible, the measurable and the felt.
What’s most exciting about this research is not just that breathwork changes the brain, but that it gives us a tool, accessible to everyone, to consciously guide that change.
At Yoga Circle, our Breathwork Circles are living laboratories for this intersection: where neuroscience meets heart, where physiology meets presence, where breath becomes medicine.
References:
Kartar et al., 2025. Neurobiological substrates of altered states of consciousness induced by high ventilation breathwork accompanied by music. PLOS ONE.
