Case study comparison of Breathing Rate and W′bal depletion across elite climbers. These examples highlight the importance of contextual adjustment for breath expressions — especially breath holds, which mask ventilatory strain despite high metabolic demand.
The scalable BPM correction maintains both rigour and adaptability in the model. Here's how Pranaclimb decodes elite climbers' breath patterns to reveal performance, pacing, and recovery secrets.
Each case study applies the Pranaclimb BR adjustment framework — accounting for screams, grunts, breath holds, and expressive exhalations — to reveal the true physiological cost hidden beneath raw breathing rate data.
Adam Ondra's ascent of Chicken Nose provides a textbook example of apparent BR undercounting during high-intensity effort. Over the 60-second crux, raw breathing rate was ~36 BPM. However, five power screams, one grunt, one passat, and approximately five brief breath holds were observed — each reflecting high ventilatory strain and isometric tension.
Applying the Pranaclimb BR correction (+15 BPM) raised the adjusted BR to ~51 BPM, placing him above CP and nearing RCP. The estimated RPE was 9–10, confirming a maximal anaerobic effort. W′bal depletion was ~60–70%, consistent with a prolonged crux well into the severe intensity domain.
In the historic ascent of Silence, Ondra demonstrated similar breath suppression dynamics. The 60-second crux showed a raw BR of ~33 BPM, despite visible strain. Analysis revealed one scream, one grunt, one passat, and ~5 brief breath holds — warranting a +15 BPM correction.
The adjusted BR of ~48 BPM indicates a clear breach of CP (~45 BPM), closely approaching RCP. RPE was estimated at 9–10, consistent with the intense neuromuscular and psychological demands of the route. W′bal depletion was again ~60–70%.
Freja Shannon's crux sequence on Sista Bossen offers a clear example of sustained effort well into the severe domain. Her raw breathing rate remained consistently above 60 BPM for the entire 60 seconds, with two screams and one audible swear reflecting intense ventilatory and emotional load.
Given the already elevated BR, no adjustment was necessary — her ventilatory drive was fully captured in the raw data. This profile places her clearly beyond the RCP threshold, with W′bal depletion estimated at 70–80%.
During Margo Hayes' crux sequence on Biographie, the raw breathing rate was recorded at approximately 19 BPM — a deceptively low value. Closer analysis identified:
Total correction: ~+16 BPM → adjusted BR of ~34–35 BPM. Although this remains below CP (~45 BPM), the elevated RPE (7–8) and presence of breath holding suggest metabolic intensity was likely near CP, with breath control strategies compressing ventilatory frequency.
A summary comparison of the four Pranaclimb athlete case studies — Adam Ondra (×2), Freja Shannon, and Margo Hayes.
| Athlete & Route | Raw BR | Correction | Adj. BR | RPE | W′bal Depletion | Zone |
|---|---|---|---|---|---|---|
| Adam Ondra Chicken Nose 9a+ |
~36 BPM | +15 BPM | ~51 BPM | 9–10 | 60–70% | Above CP → RCP |
| Adam Ondra Silence 9c |
~33 BPM | +15 BPM | ~48 BPM | 9–10 | 60–70% | Above CP → RCP |
| Freja Shannon Sista Bossen E8 6c |
>60 BPM | None needed | >60 BPM | 10 | 70–80% | Beyond RCP |
| Margo Hayes Biographie 5.15a |
~19 BPM | +16 BPM | ~34–35 BPM | 7–8 | Near CP | Near CP |
Robbie Phillips battling demons on the 8a+ crux sequence of his new route on the 700m Big Wall — a sustained high-altitude effort where breath management becomes critical to survival as well as performance.
This is gold for showing how expressive breathing, holds, and power exhales line up with Pranaclimb's adjustment rules.
Observed breathing: long breath holds, nasal inhale, power exhale, scream.
Tim Emmett's ~7 screams in 60 seconds on Era Vella isn't just emotional intensity — it's a physiological case study in how expressive exhalations affect respiratory load, W′bal depletion, and diaphragmatic fatigue.
Each scream functions as an expressive exhale — a short, high-pressure burst through partial glottal closure. Tim's attempt reveals how scream density masks true respiratory cost. With ~7 screams in under a minute, his adjusted BR and W′bal confirm RCP intensity — validating Pranaclimb's Scream-Density Override rule as a key diagnostic for expressive, high-intensity climbing.
Stacked screams, grunts, and long breath holds create high intrathoracic pressure, rapid CO₂ accumulation, and diaphragmatic strain. These effects push the climber into the Respiratory Compensation Point (RCP) even when raw BR appears low.
Trigger the Override when:
Surges with each scream → high tension on diaphragm and intercostals
Reduced tidal volume → less O₂ exchange despite heavy exhale force
Estimated 80–95% depletion across the crux
Repeated screaming strains diaphragm and intercostals — potentially causing rib flare or displacement (as seen in Tim's case)
Why it fits the Pranaclimb Methodology — he demonstrated the philosophy: Turn every dial to 10 — strength, breath, mind, recovery, belief.
🎬 Tim Emmett — Era Vella 9a
Watch on Instagram →Expressive Load is the cumulative physiological cost of non-rhythmic breath acts — screams, grunts, sighs, and holds — that alter CO₂/O₂ exchange and neural activation.
Coaching Application: Use it to understand how expressive breathing shifts a climber's effort into higher intensity zones even when BR looks low. Manage through sighs, nasal resets, and CO₂-tolerance training.
Expressive breathing (screams, grunts) adds measurable metabolic cost — treat it like power output.
Budget screams and grunts to sustain power while minimising diaphragmatic fatigue.
Use breath holds tactically — not continuously. Duration matters.
Train resilience in rhythmic breathing under fatigue.
Train expressive efficiency to sustain power without overloading the respiratory system.
Encourage active recovery sighs and nasal recovery breaths during micro-rests to restore oxygen balance.
Exhale on execution — RP Sync maximises precision at the crux moment.
Train diaphragmatic strength and control to prevent rib or intercostal stress under high tension.
Apply the Methodology
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