Pranaclimb is a field-based, non-invasive system that helps climbers understand effort, pacing, and recovery in real time through breathing. Built for climbing's intermittent efforts — anaerobic bursts, aerobic endurance, and quick recovery.
Breathing Rate + Perceived Exertion + Heart Rate Recovery → Together they power W′bal, the energy balance behind performance and recovery.
Real-time effort marker. The fastest, most sensitive effort signal — tightly linked to RPE and intensity zone.
Perceived load — tightly correlated with BR. Used to identify your personal CP and RCP thresholds.
Recovery speed — how fast HR drops in the first 60 seconds after effort. Your readiness signal for the next attempt.
BR is the fastest, most sensitive effort marker — tightly linked to RPE. These zones help climbers pace cruxes, time rests, and understand when they're in sustainable vs. unsustainable intensity.
| Zone | Relative Intensity | RPE (0–10) | Breathing Rate | Physiological Characteristics |
|---|---|---|---|---|
| Heavy (Below Threshold) | ~80–95% of CP | 6–7 | <35 BPM | Aerobic metabolism. Breathing remains steady and controlled. W′bal conserved or partially replenished. HRR is fast. |
| ⛰️ Threshold "Grey Zone" | ~95–105% of CP–RCP | 8–9 | ~45–55 BPM | BR begins to rise rapidly. Tidal volume may plateau. Borderline intensity. Small pacing errors can tip W′bal into depletion. |
| 🔥 Severe (Above Threshold) | >105% of CP/RCP | 9–10 | >55 BPM | Hyperventilation, breath holds, forceful exhalation, screams. Unsustainable. Rapid W′bal depletion. HRR is delayed or blunted. |
Click any question to expand the full answer. All content is drawn directly from Annie Anderson's published research and the Pranaclimb Methodology document.
Pranaclimb is a field-based breathing and recovery system for climbers. It translates breathing, effort, and recovery into clear performance insight — on real routes, without lab equipment.
It's built for climbing's intermittent efforts — anaerobic bursts, aerobic endurance, and quick recovery — accounting for dynamic movement, expressive breathing, postural constraints, and micro-rests.
CP and RCP are the two physiological anchors of the Pranaclimb system — the line between sustainable and unsustainable effort.
The highest breathing rate you can sustain without accelerating fatigue.
CP ≈ BR ~45 BPM, RPE 8
Boundary between heavy and severe exercise.
The point where breathing becomes hyperventilation-driven.
RCP ≈ BR >55 BPM, RPE 9–10
CO₂ blow-off accelerates. W′bal drain spikes.
The Grey Zone is the narrow transition band between sustainable (CP) and unsustainable (RCP) effort — the edge of sustainability. This is where composure, breath control, and pacing precision determine success or failure.
Energy balance: W′bal drains slowly but can partially recharge if breathing remains efficient.
W′bal represents your anaerobic energy reserve — your power battery that fuels hard moves above your sustainable threshold. Pranaclimb applies the W′bal-ODE model (Ordinary Differential Equation) that continuously tracks how this battery depletes above CP and recharges below it.
| Condition | Indicator | W′bal Change | Context |
|---|---|---|---|
| Depletion (Above CP) | BR ≥ 45 BPM, RPE ≥ 8 | –15%/10s (efficient) –30%/10s (inefficient) | Overhanging/pumpy sequences. Sustained effort ≥30s: –50–70% |
| Recovery (Below CP) | BR ≤ 35 BPM, RPE ≤ 6 | +20%/10s (relaxed shake-out) +10%/10s (mild tension) | Micro-rests: +10–20%. Kneebar/no-hands: +50%/min. Full rest ~4 min: 80–100% |
Climbing is not steady-state exercise. Breath holds, grunts, screams, sighs, and reset inhales all alter metabolic cost and ventilatory load. Pranaclimb converts these into Effective Breathing Rate, revealing hidden effort that raw breath counting alone would miss.
Formula: Effective BR = Raw BR + Σ Expression Adjustments
| Expression | Δ BR | Meaning |
|---|---|---|
| Grunt / Passat | +3 | Force transfer + trunk drive |
| Scream / Yell | +5 each | Max neural drive; 1–3 = enhancer, more = limiter |
| Breath hold <1s | +2 | Bracing; tactical on cruxes |
| Breath hold >4s | +10 | Long holds accelerate fatigue |
| Strong nasal inhale | +2 | Diaphragm priming |
| Sigh (relief) | 0 to –1 | Vagal activation — cue at rests |
| RP Sync (timing) | 0 | Context only — not extra cost |
Trigger: ≥7 screams OR ≥15s total screaming within 60s
1–3 screams: +5 BPM each · 4–6 screams: +10% W′bal cost · ≥7: force Effective BR ≥55 BPM + 20% W′bal drain
HRR₆₀ shows how quickly you're ready for the next attempt. It's a valuable indicator of autonomic nervous system function and recovery status.
Excellent recovery. Strong parasympathetic (vagal) tone. Strong aerobic fitness. Ready to go.
Moderate recovery. Take more time between attempts.
Fatigued. Poor aerobic recovery. Reset breathing and rest longer before the next attempt.
The Pranaclimb RBA is a self-guided diagnostic that maps your breathing efficiency, expressive breathing patterns, thresholds, and recovery using simple, field-ready markers.
| Pillar | Diagnostic | Focus |
|---|---|---|
| 💨 Power | PEFR (Peak Expiratory Flow Rate) | Expiratory strength & airflow power |
| 🌬️ Control | CO₂ Tolerance (Pranaclimb MBT) | Breath-hold control & composure under rising CO₂ |
| ❤️ Oxygen Delivery | SpO₂ + PI | Oxygenation + circulation + recovery reliability |
| 🏗️ Flexibility | BIQ (Breathing IQ) | Thoracic mobility & rib mechanics |
| 🧘♀️ Calm | NRP (Neural Recovery Protocol) | Parasympathetic reset & HRR₆₀ recovery |
The Pranaclimb Coaching Protocol (CoPro) transforms assessment into action — turning RBA data into personalised, performance-driven breathing strategies.
Breathing cues for CP, Grey Zone, and RCP.
Manage breath holds, grunts, screams to reduce metabolic cost.
Sigh resets, nasal control, CO₂ balance breathing → faster HRR₆₀ & W′bal recharge.
Improve composure on hard moves + reduce pump in the Grey Zone.
Yes — same system, different rhythm.
Best fit: pacing, managing the Grey Zone, and timing rests. Use BR and RPE to stay below CP until the crux.
Efforts are short but highly anaerobic. Focus on HRR₆₀ and breathing drills between burns to accelerate recharge.
Long-duration = lower CP anchor is critical. Efficiency modifiers matter more. W′bal rules apply over hours.
Micro-recovery at stances builds cumulative advantage. Monitor for "silent overbreathing" during pumpy gear placements.
| Climber & Route | Adj. BR | W′bal Depletion | Notes |
|---|---|---|---|
| Adam Ondra — Silence 9c | ~51 BPM | 60–70% | BR correction +15 BPM for screams/holds |
| Freja Shannon — Sista Bossen E8 | ~60 BPM | 70–80% | No correction needed — already at ceiling |
| Margo Hayes — Biographie 5.15a | ~35 BPM | 60–75% | Breath control masks true ventilatory demand |
| Jimmy Webb — Sleepwalker V16 | 55–60 BPM | 85–95% | Acute bouldering, no cap applied |
| Tim Emmett — Era Vella 9a | 55 BPM | 90–100% | Scream-Density Override triggered |
| Robbie Phillips — Tsaranoro 8a+ | ~46 BPM | ~55% | Efficiency over long endurance pitch |
No lab gear required — just a few simple field tools.
Smartphone or lapel microphone · Stopwatch or timer · Notebook or app · RPE (CR-10) scale
HR strap for HRR₆₀ · Mini Wright PEFR meter (£11–15) · Pulse oximeter for SpO₂ · HRV app
Pranaclimb is for any climber or coach seeking to understand performance from the inside out — bridging science, self-awareness, and flow.
RP Sync–Aligned · Expression-Adjusted · Rhythm-Sensitive · Controlled Redline added. Effective BR = Raw BR + expression adjustments.
| RPE | Zone | Description | Breathing Pattern | Raw BR | Effective BR* | W′bal |
|---|---|---|---|---|---|---|
| 0 | Baseline | Rest / Recovery | Nasal, calm, quiet, smooth | <10 | — | Full recharge |
| 1–2 | Recovery | Very Easy / Warm-up | Gentle nasal / light oronasal | 10–15 | — | Recharging |
| 3–4 | Aerobic | Moderate / Flow | Steady nasal or oronasal | 15–25 | — | Preserved |
| 5 | Heavy | Hard | Pumpy oronasal; occasional grunts | 25–30 | 35–40 | Light depletion |
| 6 | Heavy+ | Hard+ | Faster oronasal; short BHs; RP-timed exhales | 30–35 | 40–45 | Depleting |
| 7 | High Heavy | Very hard | Mouth breathing; sparse grunts/screams | 35–40 | 42–45 | Stable → falling |
| 8 | ⛰️ CP | Extremely hard but sustainable | Strong oral; RP Sync active; expressive control | 40–45 | ≈45 | Gradual depletion |
| 9 | 🔥 RCP / Severe | Near maximal | Hyperventilation or rhythmic 1:1; screams / BHs | 45–55 | 55–60+ | Rapid depletion |
| 10A | Severe — Chaotic | Maximal / failing | Gasps, breath holds, erratic | ≥60 | ≥60 | Crash depletion |
| 10B ⭐ | Controlled Redline | Maximal but composed | Steady 1:1 rhythm (~1 breath/sec) | ≈60 | ≈60 | Fast but managed |
⭐ RPE 10B = Controlled Redline — elite pattern seen in Freja Shannon & Anna Hazelnutt. Rhythm, not just rate, matters.
Apply the Science
Book your Remote Breathing Assessment with Annie and get your full Respiratory Resilience Profile — thresholds, W′bal, HRR₆₀, and a personalised coaching programme.