Is the EtCO2 readout a substitute for clinical capnography?

No, it is a mathematical teaching estimate using alveolar gas approximations, not real-time medical sensor data.

What is the 0.1 Hz peak in coherent breathing?

It is the frequency (~5.5 to 6 breaths per minute) where heart rate oscillations and breathing synchronize for maximal respiratory sinus arrhythmia.

How does the tool estimate EtCO2 during breath retention?

It models linear carbon dioxide accumulation in the lungs at a standard resting metabolic rate of approximately 3.5 mmHg per minute.

What safety precautions apply to hyperventilation and breath-hold protocols?

Never practice in or near water, while driving, or while standing, due to the risk of fainting and shallow-water blackout.

Who should avoid high-intensity retention or hyperventilation protocols?

People who are pregnant, have epilepsy, cardiovascular disease, uncontrolled hypertension, or panic disorder should avoid these methods without medical clearance.

Breath Coherent Resonance / Wim Hof / Tummo / Box / 4-7-8 Coach with Capnometer-Style EtCO2 Estimation | Online Free Tool

Breath Coherent Resonance / Wim Hof / Tummo / Box / 4-7-8 Coach with Capnometer-Style EtCO2 Estimation | Online Free Tool | Elysia Tools

Examples

1. 3-Round Wim Hof Session Planning

Breathwork Instructor

Background

An instructor wants to demonstrate how hyperventilation rounds and subsequent holds impact projected alveolar CO2 levels across a group class.

Problem

Needs an accurate timeline with clear sympathetic and parasympathetic phase indications and safe pacing guidelines.

How to use

Select 'Wim Hof' as the protocol, configure 3 rounds, set breath pacing to 2.4 seconds, retention to 75 seconds, and recovery hold to 15 seconds.

protocol: wim-hof, rounds: 3, breathsPerRound: 30, breathCycleSec: 2.4, retentionSec: 75, recoveryHoldSec: 15, baselineEtco2: 40

Outcome

Generates an 8:06 minute visual session timeline showing EtCO2 dropping from 40 mmHg to ~19.7 mmHg before rebounding during breath-holds.

2. Coherent Resonance HRV Pacing

Wellness Coach

Background

A coach needs a 10-minute resonance breathing exercise to support parasympathetic tone and optimize heart rate variability.

Problem

Requires precise 0.1 Hz (5.5 bpm) pacing parameters without inducing hyperventilation or CO2 washout.

How to use

Select 'Coherent / resonance 0.1 Hz', set duration to 10 minutes, and ensure the target rate is set to 5.5 breaths per minute.

protocol: coherent, minutes: 10, coherentBpm: 5.5, baselineEtco2: 40

Outcome

Outputs a stable 10:00 minute timeline keeping estimated EtCO2 in the 40–41 mmHg range with continuous parasympathetic phase marking.

Breath Coherent Resonance / Wim Hof / Tummo / Box / 4-7-8 Coach with Capnometer-Style EtCO2 Estimation

What this tool helps you do

Run this tool

Examples that match this tool

Continue with connected tools and hubs

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. 3-Round Wim Hof Session Planning

2. Coherent Resonance HRV Pacing

FAQ

Copyright-Free FLAC Audio Samples

Copyright-Free WAV Audio Samples

Android Image Processing Java Samples

Android Image Processing Kotlin Samples

Carbon Footprint Calculator (Activity-Based)

Drug Half-Life Concentration Calculator

Logistic Population Growth (N_t = K/(1+((K−N₀)/N₀)·e^(−rt)))

Mark-Recapture Population Estimate (Lincoln–Petersen & Chapman)