Pneuma Trance® is designed for healthy adults and uses a structured combination of guided breathing, interoception, meditative trance, meditation and introspective attention. The breathing phase can temporarily modify ventilation, carbon dioxide levels, heart rate, blood pressure, cerebral blood flow and subjective perception. These physiological responses vary according to breathing depth, rhythm, duration and individual health status.
GENERALLY SUITABLE
Pneuma Trance® is generally suitable for healthy adults who are able to participate comfortably in guided breathing and meditation, communicate clearly with the facilitator and stop or modify the practice when needed.
Participants should be able to recognize discomfort, remain responsive to facilitator instructions and respect their own physical and psychological limits.
A temporary increase in breathing depth or frequency may lower carbon dioxide levels if ventilation exceeds the body's metabolic requirements. Lower CO₂, or hypocapnia, can produce temporary sensations such as tingling, lightheadedness, changes in bodily perception, muscle tension or altered awareness. These effects are physiologically associated primarily with changes in CO₂ and blood pH, rather than with a simple lack of oxygen. Excessive ventilation can produce respiratory alkalosis and cerebral vasoconstriction, reducing cerebral blood flow temporarily. Johns Hopkins Medicine
For healthy individuals these physiological changes are usually transient, but Pneuma Trance® does not require a participant to force the breathing pattern or continue through significant discomfort.
PEOPLE MAY EXPLORE PNEUMA TRANCE® FOR...
Participants may come to Pneuma Trance® with experiences such as stress, emotional tension, difficulty slowing down, grief, repetitive thoughts, personal transitions, interest in introspection or a desire to explore expanded states of consciousness.
These are not medical indications and Pneuma Trance® should not be presented as a treatment for psychiatric or medical disease.
Controlled breathing practices as a broad category have shown evidence of modest reductions in self-reported stress and anxiety in some randomized studies, although the research includes many different techniques and cannot be directly generalized to Pneuma Trance®. Evidence is stronger for slower regulated breathing than for intensive or high-ventilation practices, and adverse-event reporting remains incomplete. PubMed Central (PMC)
Participants with diagnosed anxiety, trauma-related disorders, depression or other psychological conditions should discuss participation with the facilitator and, when appropriate, with the professional responsible for their care. The intensity of breathing and the depth of the introspective phase can be modified individually.
NOT RECOMMENDED / REQUIRES ADDITIONAL EVALUATION PREGNANCY
Classification: Precaution - participation not recommended during pregnancy.
Pregnancy naturally changes respiratory physiology. Progesterone increases respiratory drive, primarily by increasing tidal volume. Minute ventilation rises approximately 30-50%, while arterial carbon dioxide pressure, PaCO₂, normally decreases from approximately 40 mmHg before pregnancy to approximately 27-32 mmHg during pregnancy. This produces a mild, compensated respiratory alkalosis that is normal during pregnancy. PubMed Central (PMC)
If ventilation is increased substantially beyond this physiological baseline, maternal CO₂ can fall further. Marked respiratory alkalosis should be avoided during pregnancy because excessive hypocapnia can reduce uterine blood flow and may adversely affect fetal oxygen delivery. This is a recognized physiological concern in obstetric respiratory medicine. PubMed Central (PMC)
This does not mean that normal controlled breathing is inherently dangerous during pregnancy. The concern is specifically with breathing patterns capable of producing substantial additional hypocapnia or other strong physiological changes.
Pneuma Trance® has not been clinically studied for safety during pregnancy. Therefore, participation is not recommended as a precaution.
EPILEPSY OR HISTORY OF SEIZURES
Classification: Established clinical risk - participation not recommended without specialist medical clearance.
The relationship between hyperventilation and epilepsy is well established in clinical neurophysiology. Voluntary hyperventilation has been used for decades during EEG testing because it can activate epileptiform electrical activity and, in susceptible individuals, provoke seizures. PubMed
The effect is particularly strong in absence epilepsy. Hyperventilation can provoke generalized spike-wave activity in more than 90% of individuals with childhood absence epilepsy and can provoke clinical absence seizures. PubMed Central (PMC)
The proposed mechanism involves hypocapnia, respiratory alkalosis, changes in cerebral blood flow and increased neuronal excitability. The degree of susceptibility varies significantly between epilepsy syndromes. PubMed Central (PMC)
Because Pneuma Trance® includes a breathing phase capable of modifying ventilation and CO₂, people with epilepsy or a history of unexplained seizures should not participate without approval from the physician or neurologist responsible for their care.
SIGNIFICANT CARDIOVASCULAR CONDITIONS
Classification: Medical precaution - requires medical evaluation.
Breathing directly influences cardiovascular physiology. Changes in intrathoracic pressure, autonomic activity, venous return, heart rate and blood pressure occur normally with respiration. More substantial changes in ventilation can produce additional cardiovascular effects. PubMed Central (PMC)
Hypocapnia can cause systemic and cerebral vasoconstriction. In people with established coronary artery disease, experimental hyperventilation has been shown to reduce coronary blood flow and has been used experimentally to provoke myocardial ischemia in susceptible patients. PubMed
This evidence does not mean that controlled breathing is unsafe for all people with cardiovascular disease. Many slow-breathing techniques can have favorable cardiovascular effects. The concern is with significant cardiovascular disease combined with more intensive respiratory manipulation.
Medical evaluation is recommended for individuals with conditions such as significant coronary artery disease, unstable hypertension, clinically important arrhythmias, heart failure, previous major cardiovascular events, aneurysm or other cardiovascular conditions considered unstable or high risk.
GLAUCOMA OR RETINAL PROBLEMS
Classification: Precaution - ophthalmologic evaluation recommended for significant disease.
Intraocular pressure can change with physical strain, body position, respiratory pressure changes and particularly with Valsalva-type maneuvers or breath holding. Temporary elevations in intraocular pressure have been documented during activities involving increased intrathoracic pressure. PubMed Central (PMC)
For most healthy eyes these transient changes are not clinically significant. The concern applies to individuals whose optic nerve or retina may already be vulnerable, including certain forms of glaucoma, retinal detachment, recent retinal surgery or other significant retinal disease.
Pneuma Trance® does not intentionally require forceful Valsalva maneuvers. Nevertheless, because participants may occasionally generate muscular or respiratory pressure during intense experiences, significant glaucoma or retinal disease should be reviewed with an ophthalmologist before participation.
The recommendation is primarily precautionary. Direct clinical studies of Pneuma Trance® in glaucoma or retinal disease do not exist.
RECENT SURGERY OR SIGNIFICANT RECENT INJURY
Classification: Precaution - participation postponed until adequate recovery or medical clearance.
The concern following recent surgery is not primarily related to CO₂. It relates to healing tissue, surgical wounds, cardiovascular demand, discomfort, changes in abdominal or thoracic pressure and involuntary muscular contraction.
Depending on the procedure, deep breathing, strong respiratory effort, abdominal engagement or changes in intrathoracic pressure may increase discomfort or mechanical stress around a healing area.
There is no evidence establishing a universal waiting period applicable to every type of surgery. Therefore, this is an individualized precaution rather than an absolute physiological contraindication.
Participants recovering from major surgery, abdominal or thoracic surgery, eye surgery, orthopedic procedures or significant injury should obtain clearance from their treating clinician before participating.
SERIOUS RESPIRATORY CONDITIONS
Classification: Condition-dependent - medical evaluation recommended.
People with significant respiratory disease may respond differently to changes in breathing pattern, ventilation and CO₂.
In asthma, hypocapnia and high ventilation can contribute to bronchoconstriction in susceptible individuals. Experimental hyperventilation has been used to provoke bronchoconstriction in asthma research. PubMed
This does not mean that breathing practices are universally contraindicated in asthma. In fact, carefully regulated breathing techniques may be beneficial for some individuals. The risk depends on the breathing technique, disease severity and clinical stability.
People with severe or poorly controlled asthma, COPD, significant restrictive lung disease, pulmonary vascular disease, recent respiratory hospitalization or unexplained shortness of breath should receive medical evaluation before participating.
Participants with mild, stable respiratory conditions may sometimes participate with appropriate modification, but the facilitator should be informed beforehand.
HISTORY OF PSYCHOSIS, MANIA OR SEVERE PSYCHIATRIC CONDITIONS
Classification: Precaution based on vulnerability and limited direct safety evidence.
Pneuma Trance® is designed to facilitate introspection and may produce temporary changes in perception, emotion, sense of self and subjective consciousness.
The available scientific literature on high-ventilation and circular breathing frequently excludes participants with histories of psychosis or severe psychiatric disorders. One recent circular-breathing study excluded individuals with previous psychosis and certain other psychiatric conditions before participation. PubMed Central (PMC)
Clinical literature on intensive breathing practices also identifies psychotic and bipolar-spectrum disorders as populations requiring particular caution. However, the direct evidence demonstrating that breathing itself causes psychosis or mania is limited, and the safety literature remains incomplete. PubMed
Importantly, slower therapeutic breathing techniques are not equivalent to high-ventilation or altered-state breathing. Some controlled breathing interventions have even been studied in people with bipolar disorder without reported worsening. PubMed
Therefore, the recommendation is precautionary rather than a claim that Pneuma Trance® causes psychiatric episodes.
Individuals with active psychosis, current mania, severe dissociation, psychiatric instability or recent psychiatric hospitalization should not participate. A person with a remote and stable psychiatric history should discuss participation with the clinician responsible for their care and with the Pneuma Trance® facilitator before participating.
ALCOHOL OR RECREATIONAL DRUGS
Classification: Participation not permitted while intoxicated or impaired.
Participants should arrive sober and able to understand instructions, communicate clearly and make informed decisions throughout the session.
Alcohol and recreational drugs can alter cognition, balance, cardiovascular function, respiratory control, emotional regulation and perception. Combining an altered physiological or psychological state with an introspective breathing practice makes responses less predictable and reduces the facilitator's ability to distinguish expected session effects from substance-related effects.
This policy is therefore based primarily on safety, informed consent and predictability rather than on a specific documented interaction between Pneuma Trance® and a particular substance.
Participation should be postponed if the person is visibly intoxicated, cognitively impaired or under the acute effects of recreational drugs.
OTHER MEDICAL OR PSYCHOLOGICAL CONDITIONS
Classification: Individual evaluation.
No safety list can cover every medical or psychological condition.
A participant should disclose any significant condition that could affect breathing, cardiovascular function, consciousness, neurological stability, mobility, emotional regulation or the ability to communicate during the session.
Additional evaluation may be appropriate for conditions involving:
cardiovascular instability
neurological disorders
significant respiratory disease
recent major surgery or injury
significant eye disease
recurrent fainting or unexplained loss of consciousness
active or unstable psychiatric illness
any condition for which a physician has advised avoiding intense exertion, respiratory manipulation or altered-state practices
The presence of a diagnosis does not automatically mean that participation is impossible. The decision depends on severity, stability, treatment status, individual physiology and the type of modification required.
DURING THE SESSION
Participants are encouraged to remain aware of their physical limits throughout the session.
The breathing phase should be reduced or stopped if a participant develops significant chest pain, severe difficulty breathing, loss of consciousness, new neurological symptoms, severe disorientation, persistent visual disturbance or any symptom that feels medically concerning.
Mild transient sensations such as tingling, lightheadedness, temperature changes or changes in bodily perception can occur when ventilation changes. These sensations should not be interpreted automatically as evidence that the practice is working or that the participant should breathe harder.
Pneuma Trance® does not require participants to force breathing beyond comfort.
MEDICAL CLEARANCE
When medical clearance is requested, the purpose is not to ask a healthcare professional to "approve Pneuma Trance®" as a medical treatment.
The relevant question is whether the individual's health condition permits participation in a guided practice that may involve temporary increases in ventilation, changes in CO₂, meditation, emotional activation and an altered subjective state of consciousness.
Participants should provide their healthcare professional with an accurate description of the practice rather than describing it only as meditation or relaxation.
IMPORTANT SCIENTIFIC DISTINCTION
The physiological effects described on this page come primarily from established respiratory physiology, hyperventilation research, clinical neurophysiology, cardiovascular medicine, ophthalmology and studies of other structured breathing practices.
Pneuma Trance® itself has not yet been clinically studied across all of these medical populations.
Therefore:
Established evidence means the physiological mechanism or risk has been demonstrated in medical research.
Precaution means there is a scientifically plausible concern, but direct evidence specifically involving Pneuma Trance® is absent or insufficient.
Medical evaluation recommended means the condition varies sufficiently between individuals that a blanket recommendation would not be scientifically appropriate.
This distinction is intentional. Pneuma Trance® safety guidelines should reflect what is known, what remains uncertain and where professional medical judgment is appropriate.