From grimoire
Guides through Wim Hof Method breathing protocol (3-4 rounds of power breaths + retention) for acute stress, cold exposure prep, or building autonomic resilience by voluntarily activating the sympathetic nervous system.
How this skill is triggered — by the user, by Claude, or both
Slash command
/grimoire:apply-wim-hof-breathingThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Perform 3–4 rounds of 30 deep power breaths followed by breath retention and a recovery breath — inducing voluntary sympathetic activation, alkalosis-mediated epinephrine release, and measurable suppression of the innate immune response.
Perform 3–4 rounds of 30 deep power breaths followed by breath retention and a recovery breath — inducing voluntary sympathetic activation, alkalosis-mediated epinephrine release, and measurable suppression of the innate immune response.
Adopted by: Wim Hof Method has 10,000+ certified instructors across 40+ countries. Featured in US Special Operations unit training and adopted by CrossFit and tactical fitness communities. Taught in clinical research settings at Radboud University (Nijmegen), where the foundational RCT was conducted. Andrew Huberman (Stanford neuroscience), Peter Attia, and Tim Ferriss all practice and publicly detail the protocol. Over 10 peer-reviewed studies published since 2014. Impact: Kox et al. (2014) PNAS — randomized controlled trial with objective immune challenge (endotoxin injection): WHM-trained group showed 2× higher epinephrine levels, 50% lower pro-inflammatory cytokines (TNF-α, IL-6, IL-8), and almost complete elimination of flu-like symptoms compared to controls. This was the first peer-reviewed demonstration that humans can voluntarily modulate the innate immune response. Muzik et al. (2018) NeuroImage: Clinical — showed WHM practitioners sustain normal core temperature in extreme cold through increased brown adipose tissue activation and altered brain thermoregulation. Pratali et al. (2023): 8-week WHM training reduced resting heart rate and improved HRV. Why best: Standard relaxation breathing (slow diaphragmatic breathing) activates the parasympathetic system and reduces arousal — the opposite of WHM's mechanism. WHM breathing deliberately over-activates the sympathetic nervous system through controlled hyperventilation (alkalosis → epinephrine release), then exploits the subsequent parasympathetic rebound. The result is a calibrated stress inoculation — you train your nervous system to activate under demand and recover rapidly. Meditation reduces stress by avoiding arousal; WHM trains you to handle it.
Sources: Kox et al. (2014) PNAS; Muzik et al. (2018) NeuroImage: Clinical; Pratali et al. (2023); Wim Hof Method certification curriculum
Safety: NEVER perform WHM breathing in or near water, while driving, while standing, or in any situation where losing consciousness would be dangerous. The breath retention phase can cause loss of consciousness in a small percentage of people. Always lie down or sit safely.
Position: Lying on back (preferred) or seated upright
Location: Quiet room, floor, or bed — somewhere safe if you lose consciousness
Timing: Morning before eating; or any time on an empty stomach
Avoid: immediately after intense exercise, within 1 hour of eating
Duration: 15–25 minutes for 3–4 rounds
Each round consists of three phases:
Phase A — Power breaths (30 reps)
Inhale deeply through nose or mouth, filling from belly to chest. Exhale passively — let it out without force. Do not pause at top or bottom.
Breath pace: ~1 breath per 2 seconds (not hyperventilating speed — controlled power)
Count: 30 breaths per round (some practitioners use 40 on later rounds)
Sensation: tingling in hands, feet, face — normal; dizziness possible — normal
Lightheadedness = alkalosis from CO2 reduction — expected, not dangerous
Phase B — Breath retention (hold after exhale)
After the 30th power breath, exhale completely and hold:
Hold: after EXHALE (lungs mostly empty)
Duration: Hold until you feel a strong urge to breathe — do not force; let the urge build
Typical retention: 1–3 minutes (increases with practice)
During hold: body is in controlled hypoxia + alkalosis state
Phase C — Recovery breath
When the urge to breathe becomes strong:
Take one full deep breath in → hold at top for 15 seconds → exhale
This is the recovery breath — it restores CO2 balance
This completes one round. Rest 30–60 seconds, then begin Round 2.
Round 1: 30 power breaths + retention + recovery breath
Round 2: 30 power breaths + retention + recovery breath (retention often longer)
Round 3: 30 power breaths + retention + recovery breath
Round 4 (optional): 30–40 power breaths + longer retention
After the final round:
Normal responses: deep calm, mental clarity, mild warmth, slight tingling in extremities
Duration of calm state: 20–60 minutes
Timing of cold exposure: if pairing with cold shower/ice bath, enter immediately after
final round while in heightened sympathetic state
WHM was developed as a combined breathing + cold protocol. If combining:
1. Complete 3–4 breathing rounds
2. Within 5 minutes, enter cold shower (cold only — start at 1 min, build to 3–5 min)
3. The breathing pre-activates the sympathetic response, making cold tolerance easier
Cold exposure alone without breathing is covered in apply-heat-cold-therapy-protocol.
For personal health decisions, consult a qualified healthcare provider.
npx claudepluginhub jeffreytse/grimoire --plugin grimoireGuides through healing modalities including energy work, herbal remedies, first aid, and holistic techniques for physical or energetic imbalances.
Use when establishing a regular sauna practice for cardiovascular health and longevity — to apply the evidence-based frequency, duration, and temperature parameters shown to reduce all-cause mortality.
Provides evidence-based training guidance using 2025 research on hypertrophy, progressive overload, and biomechanics for designing strength and muscle development programs.