Why Does My Body Lock Up (Tetany) During Breathwork - Is It Dangerous?
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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.
Why This Happens
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.
What Can Help
- Grounding techniques — Physical presence practices that anchor you in the present moment
- Breath regulation — Slow, intentional breathing to shift nervous system state
- Cognitive reframing — Examining thoughts and challenging catastrophic thinking
- Somatic awareness — Noticing bodily sensations without judgment
- Professional support — Therapy when patterns are persistent or overwhelming
When to Seek Support
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.
If these experiences are interfering with your daily functioning, relationships, or sense of safety, working with a trauma-informed therapist can provide personalized tools and a container for processing that may not be possible alone.
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Robert Greene
Research References
This content draws from peer-reviewed research and established clinical frameworks.
Primary Research
- Felitti, V.J. et al. (1998). Relationship of childhood abuse and household dysfunction to many of the leading causes of death in adults: The ACE Study. Am J Prev Med, 14(4), 245-258. [Link]
- Porges, S.W. (2001). The polyvagal theory: phylogenetic substrates of a social nervous system. Int J Psychophysiol, 42(2), 123-146. [Link]
- Bremner, J.D. (2006). Traumatic stress: effects on the brain. Dialogues Clin Neurosci, 8(4), 445-461. [Link]
- Payne, P., Levine, P.A. & Crane-Godreau, M.A. (2015). Somatic experiencing: using interoception and proprioception as core elements of trauma therapy. Front Psychol, 6, 93. [Link]
- Van der Kolk, B.A. & Fisler, R. (1995). Dissociation and the fragmentary nature of traumatic memories. J Trauma Stress, 8(4), 505-525. [Link]