Part of Somatic Practices cluster.
Short Answer
Tetany (muscle cramping/locking) during breathwork is usually caused by rapid changes in blood CO2 and calcium levels. It's uncomfortable but rarely dangerous for healthy people. However, certain medical conditions make it risky—know your contraindications.
What This Means
Tetany feels like your hands curling into claws, your fingers stiffening, or your face muscles locking. It happens because certain breathing patterns (especially rapid, deep breathing) lower CO2 levels in your blood, which affects calcium availability to your muscles.
Picture this: You're in a breathwork session. Suddenly your hands seize up like paws. Your lips tingle. Maybe your feet cramp. If you didn't expect this, it can feel terrifying—like something is seriously wrong. It's usually not.
Why This Happens
- Hyperventilation: Breathing too fast/too deep drops CO2
- CO2 drop: Alkalosis affects calcium absorption
- Emotional release: Your body holding tension it's releasing
The biology: Lower CO2 causes respiratory alkalosis, which reduces ionized calcium in your blood. Muscles need calcium to relax—without enough, they contract and lock up.
What Can Help
- Exhale completely and hold briefly
- Return to slow, nasal breathing
- Breathe into a paper bag if cramping persists
- Massage cramped muscles gently
- Slow down your breathing rate in future sessions
When to Seek Support
Seek medical attention if:
- Tetany lasts longer than 10 minutes after stopping breathwork
- You experience chest pain or severe shortness of breath
- You have a history of heart disease or seizures
- The experience triggers panic that doesn't subside
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Research References
This content draws on research in respiratory physiology and somatic practices.
Primary Research
- Nestor, J. (2020). Breath: The New Science of a Lost Art. Riverhead Books.
- American Psychological Association — Somatic Practices
Foundational Authorities
