Breathwork supports emergence of altered states of consciousness

Physiological mechanisms (CO2, O2, hyperventilation)

• Many comments stress that most “circular” or holotropic breathwork is essentially structured hyperventilation.
• Hyperventilation lowers CO2 (hypocapnia), which raises blood pH (alkalosis) and can cause cerebral vasoconstriction and reduced oxygen delivery to the brain, despite high blood oxygen saturation.
• Several people note classic symptoms: tingling, numbness, muscle cramps/tetany, lightheadedness, time distortion, and hallucinations.
• Others highlight that some breathwork protocols can increase blood oxygenation, but there is disagreement over what this implies for brain oxygen and long‑term safety.
• CO2/O2 balance, the Bohr effect, and lack of direct oxygen sensing by the nervous system are repeatedly mentioned as core mechanisms.

Reported experiences and altered states

• Multiple participants describe holotropic/Wim Hof–style sessions as surprisingly powerful: visions, strong emotions, “afterglow” similar to mild psychedelics, out‑of‑body or “otherworldly” states.
• Experiences include intense facial contortions, heavy sweating, emotional catharsis, and a sense of positivity or expansion afterward.
• Others find it mainly uncomfortable, anxiety‑inducing, or underwhelming, feeling like “just hyperventilating.”

Therapeutic and performance claims

• Breathwork is discussed for panic attacks, PTSD, trauma release, and entering flow states; some report benefit, others do not.
• There’s mention of guided narratives in sessions (trauma/emotion surfacing and “release”), which appear to influence outcomes.
• One thread notes anti‑anxiety research on N‑acetylcysteine and its respiratory effects, alongside its established mucolytic use.

Risks, brain health, and safety

• Several commenters worry that repeated induced hypoxia or vasoconstriction could damage the brain, drawing analogies to freediving and head impacts; others argue freedivers “seem fine,” but counter‑references cite possible neural injury markers.
• People warn about fainting and safety constraints (e.g., not doing Wim Hof breathing near water, while driving, or where a fall is dangerous).
• Some see tingling/cramps as a clear bodily warning; others describe the same sensations as benign or even desirable.

Comparisons to psychedelics, meditation, and yoga

• Holotropic breathwork is framed as an LSD substitute developed under prohibition; some now prefer legal or traditional psychedelics instead.
• Multiple comments tie breathwork to pranayama, bhastrika, kapalbhati, and related yoga practices, with claims of complementary roles alongside seated meditation.
• Debate arises over whether breathwork accesses “higher” versus merely “altered” states; some advocate pure meditation as safer, others emphasize breathwork’s unique value.

Skepticism, commercialization, and “woo”

• Several participants object to the term “breathwork” and to spiritual or elitist framing, seeing much of the scene as overhyped or exploitative.
• Claims of permanent IQ increases or dramatic cognitive enhancement from extreme techniques are widely labeled as nonsense or baseless.
• Others argue that dismissing ancient or experiential practices as “woo” is premature, given open questions about consciousness, trauma, and spiritual experience.