Why the labels matter
Breathing research usually studies a method, a rate or a supervised programme — not a commercial app and not every possible timer ratio. Calling all 30 rhythms “peer-reviewed protocols” would flatten important differences. We use a stricter map: direct evidence for a close protocol match, adjacent evidence for a broader family, and practice-level for an app-authored cadence.
Direct · 2
Close protocol match
The named method or its defining phase structure was evaluated in the cited study.
Adjacent · 12
Broader family evidence
Research supports the broader breathing family or mechanism, not this exact app cadence.
Practice · 16
No direct validation
An editorial practice rhythm without a direct research match. It must not be described as clinically proven.
Product status
Not a clinical trial
PulseWave is a general-wellness app in its launch phase, with App Store availability targeted by 29 July 2026 subject to Apple review. No study listed here evaluated the app.
Directly matched methods
“Direct” means the defining method appears in the study. It does not mean the app was tested, that a benefit is guaranteed, or that the exercise treats a condition.
Cyclic Sighing
The defining double inhale and prolonged exhale match the cyclic-sighing arm. The app itself was not studied.
Reference: Balban MY et al. (2023)
Box Breathing
Balban et al. included an equal-phase box-breathing arm. It does not establish superiority for every use case.
Reference: Balban MY et al. (2023)
Related evidence, not exact validation
These rhythms sit inside a studied family such as slow-paced breathing or HRV biofeedback. The precise count, label, duration or product framing may be unique to the app.
Micro Reset 60s
A short 5–5 slow-breathing cadence. The one-minute product format was not directly evaluated by these reviews.
Reference: Zaccaro A et al. (2018) · Lehrer PM and Gevirtz R (2014)
Coherent Breathing
Six breaths per minute is within the usual resonance-frequency range, but individual resonance varies.
Reference: Zaccaro A et al. (2018) · Lehrer PM and Gevirtz R (2014)
Resonance (0.1 Hz)
Related to HRV-biofeedback literature; a fixed pacer is not individualized biofeedback on its own.
Reference: Lehrer PM and Gevirtz R (2014) · Zaccaro A et al. (2018)
Rhythmic Activation
The studies involved cyclic hyperventilation and retention, with important protocol and safety differences. No immune benefit is claimed for the app.
Reference: Kox M et al. (2014) · Balban MY et al. (2023)
Extended Exhale 4-6
Slow breathing has a broader evidence base; current evidence does not show one exhale ratio is universally superior.
Reference: Zaccaro A et al. (2018) · Meehan ZM and Shaffer F (2024)
Extended Exhale 5-7
A slow, exhale-biased cadence. The exact 5–7 timing has not been directly validated here.
Reference: Zaccaro A et al. (2018) · Meehan ZM and Shaffer F (2024)
Grounding 5-5
The cadence falls within slow-breathing literature; “grounding” is product framing.
Reference: Zaccaro A et al. (2018) · Lehrer PM and Gevirtz R (2014)
Box 5-5-5-5
Related to equal-phase box breathing, but the trial does not establish this exact five-second variant.
Reference: Balban MY et al. (2023)
Coherent 5-6
Slow and near the usual resonance range; the mild exhale bias is not proven superior.
Reference: Zaccaro A et al. (2018) · Lehrer PM and Gevirtz R (2014) · Meehan ZM and Shaffer F (2024)
Coherent 6-6
Five breaths per minute sits in the broad resonance range for many adults, but not necessarily every individual.
Reference: Zaccaro A et al. (2018) · Lehrer PM and Gevirtz R (2014)
Pre-Speech 4-6
Related to slow breathing and down-regulation; public-speaking performance was not directly tested.
Reference: Zaccaro A et al. (2018) · Meehan ZM and Shaffer F (2024)
Recovery 4-7
Related to slow breathing; “recovery” is an app goal rather than a clinically validated endpoint.
Reference: Zaccaro A et al. (2018) · Meehan ZM and Shaffer F (2024)
Practice rhythms without a direct study match
These are included as pacing options, not as proven treatments. Names such as “focus”, “recovery”, “sleep” or “jetlag reset” describe the intended context and must not be read as a measured medical outcome.
4-7-8 (Sleep)
A popular wind-down cadence. The sleep review concerns slow breathing broadly and does not validate the precise 4-7-8 count.
Reference: Eide EM, Hernes HM and Grønli J (2026)
Deep mental recovery
An app-authored slow-breathing and relaxation format. No direct paper is claimed for this exact session.
Reference: No direct publication claimed
Anti-Panic 3-6
A conservative no-hold rhythm. The name describes intended use, not a treatment for panic disorder.
Reference: Zaccaro A et al. (2018)
Cadence 3-6-5
An app-authored progression rhythm without a direct research match.
Reference: No direct publication claimed
Tactical 4-3-3-4
A performance-oriented app cadence. Operational use is not equivalent to controlled clinical evidence.
Reference: No direct publication claimed
Triangle 4-4-4
A simple three-phase coaching rhythm without a direct research match.
Reference: No direct publication claimed
Sleep Ladder 3-6-9
An app-authored bedtime cadence. The review does not validate this exact ladder or its breath hold.
Reference: Eide EM, Hernes HM and Grønli J (2026)
Sleep Deep 6-8-10
A demanding app-authored bedtime cadence; objective sleep evidence for slow breathing remains inconclusive.
Reference: Eide EM, Hernes HM and Grønli J (2026)
Deep mental recovery (long)
A longer app-authored relaxation format. It should not be described as equivalent to sleep.
Reference: No direct publication claimed
Gentle Activation 2-2
A brisk app-authored cadence without a direct research match.
Reference: No direct publication claimed
Activation 2-6
An app-authored performance rhythm. “Activation” is an intended feel, not a measured outcome.
Reference: No direct publication claimed
Focus Ladder 4-5-6
An app-authored cadence. No claim is made that the exact sequence improves cognition.
Reference: No direct publication claimed
Anxiety Release 2-7
A strongly exhale-biased app cadence. The label is not a claim to treat an anxiety disorder.
Reference: Zaccaro A et al. (2018) · Meehan ZM and Shaffer F (2024)
Low HRV Support 4-8
A fixed cadence is not individualized HRV biofeedback and must not be used for medical decisions.
Reference: Lehrer PM and Gevirtz R (2014) · Meehan ZM and Shaffer F (2024)
Jetlag Reset 5-8
A travel wind-down rhythm. It has not been shown to reset circadian timing or treat jet lag.
Reference: No direct publication claimed
Nasal Relief 4-6
A gentle nasal-breathing cadence. It is not a treatment for sinus disease or obstruction.
Reference: No direct publication claimed
Core publications and limitations
Randomized controlled trial · 2023
Brief structured respiration practices enhance mood and reduce physiological arousal
Balban MY et al. · Cell Reports Medicine
The trial studied five minutes per day for 28 days and compared three structured breathing practices with mindfulness. It did not test PulseWave.
Systematic review · 2018
How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing
Zaccaro A et al. · Frontiers in Human Neuroscience
The review addresses slow breathing below 10 breaths per minute as a broad family. It does not establish that one exact inhale-to-exhale ratio is best.
Mechanistic review · 2014
Heart rate variability biofeedback: how and why does it work?
Lehrer PM and Gevirtz R · Frontiers in Psychology
HRV biofeedback usually identifies or trains near an individual resonance frequency. A fixed six-breath-per-minute pacer is related, but it is not individualized biofeedback by itself.
Original and replication studies with literature review · 2024
Do Longer Exhalations Increase HRV During Slow-Paced Breathing?
Meehan ZM and Shaffer F · Applied Psychophysiology and Biofeedback
The two studies did not find an HRV advantage for a 1:2 over 1:1 inhale-to-exhale ratio at six breaths per minute. Longer exhalation should not be marketed as universally superior.
Randomized study · 2017
The Effect of Diaphragmatic Breathing on Attention, Negative Affect and Stress in Healthy Adults
Ma X et al. · Frontiers in Psychology
This study evaluated a multi-session diaphragmatic-breathing intervention. It does not validate every paced-breathing timer or a short one-off session.
Randomized controlled experiment · 2014
Voluntary activation of the sympathetic nervous system and attenuation of the innate immune response in humans
Kox M et al. · Proceedings of the National Academy of Sciences
The intervention combined meditation, cyclic hyperventilation with retention and cold exposure before experimental endotoxemia. It is not evidence that PulseWave treats inflammation.
Systematic review · 2026
Slow breathing techniques before bedtime and the effects on sleep: A systematic review
Eide EM, Hernes HM and Grønli J · Sleep Medicine Reviews
Self-reported sleep outcomes were encouraging, while objective actigraphy and polysomnography findings were inconclusive. The authors call for longer, higher-quality studies.
Safety and scope
PulseWave is a consumer wellness tool, not a medical device. Stop if you feel dizzy, faint, breathless or unwell. Do not use activation or retention practices while driving, in water or where fainting could cause harm. People with cardiovascular or respiratory conditions, epilepsy, pregnancy-related concerns or a history of panic triggered by breathwork should ask a qualified clinician before starting a new practice.
Evidence is not endorsement. Authors, journals and institutions cited here do not endorse PulseWave. A paper about a breathing technique does not establish that this implementation produces the same result.
Corrections and reproducibility
The public JSON evidence map is checked against src/data/breathingPatterns.ts whenever this page is built. A missing, renamed or extra pattern makes the build fail instead of silently publishing an obsolete count. See the editorial policy or report a source issue to support@highroadsoftware.com.