Undiscovered or Unbalanced Dysfunctional Breathing (UDB)

UDB is Michael Grant White's term for a pattern of breathing that is persistently inefficient enough to cause symptoms, without any disease being present to explain it. Clinicians call the same thing dysfunctional breathing, or a breathing pattern disorder. It is common, it is often missed, and it responds to breathing retraining.

The letters stand for Undiscovered, Undetected or Unbalanced — Deep or Dysfunctional — Breathing.

This page explains what it is, what the evidence says about how common it is, what the symptoms are, how it is properly assessed, and what actually helps. It also sets out plainly what dysfunctional breathing is not, because that part is usually told badly.

First, the Thing Most Pages Get Backwards

Dysfunctional breathing is a diagnosis of exclusion. The clinical guidance is explicit: it should be identified only after organic disease has been ruled out or adequately treated (Boulding et al., 2016).

That ordering matters more than anything else on this page. Breathlessness, chest tightness and chest pain are also symptoms of asthma, heart disease, anaemia, pulmonary embolism and a long list of other conditions that need proper medical attention. Deciding your breathing pattern is the explanation before those have been considered is the one genuinely dangerous move available here.

So: see a doctor first. Breathing retraining sits alongside medical care — after it, informed by it, never instead of it. If you take prescribed medication, keep taking it.

We have previously written about UDB on this page in ways that implied the opposite — that medical treatment is the thing to be avoided. That was wrong and we have removed it.

How Common Is It?

More common than most people, including many clinicians, assume:

• About 10% of the general population screen positive for hyperventilation on the Nijmegen Questionnaire (Thomas et al., 2005).
• Around 30% of people with asthma are estimated to have dysfunctional breathing alongside it (Boulding et al., 2016). An earlier primary care survey found roughly a third of women and a fifth of men treated for asthma scored in the suggestive range (Thomas et al., 2001).
• In difficult or severe asthma it is higher still — 47% in one Australian difficult-asthma clinic (Denton et al., 2019), and 41% across a five-centre study of 1,127 severe asthma patients, ranging from 25% in Singapore to 49% in Southampton (Kurukulaaratchy et al., 2025).

That last figure is the interesting one. When asthma is not responding the way it should, a disordered breathing pattern sitting on top of it is one of the more likely reasons — and it is treated differently from the asthma.

What It Feels Like

The symptoms fall into three groups.

Breathing symptoms

• Breathlessness, including breathlessness out of proportion to the effort
• Chest tightness or chest pain
• An inability to get a satisfying breath — "air hunger"
• Frequent sighing or yawning
• Breathing that feels stuck, restricted, or like a series of separate events rather than one smooth movement

Symptoms from low carbon dioxide

When you breathe more than your body's metabolic needs require, blood carbon dioxide falls and blood becomes more alkaline. That produces a specific and recognisable cluster:

• Tingling in the fingertips and around the mouth
• Light-headedness and dizziness
• Headache
• Visual disturbance
• Tremor, and occasionally unsteadiness
• A raised heart rate

Mechanical and postural consequences

When the diaphragm is not doing its share, the neck, shoulder and upper-chest muscles take over. They can move air, but they are small and they tire. Over time that pattern is associated with:

• Raised shoulders and forward head posture
• Neck, shoulder and jaw tension
• Upper-chest breathing at rest
• Difficulty taking a full breath when bending or sitting slumped

The animation above shows what this looks like mechanically. In an easy breath the movement travels as one continuous wave from the diaphragm upward. Where the pattern is restricted, the wave hits a speed bump and stops — and the accessory muscles take over to finish the job.

Try this now: bend forward and notice how much harder it is to breathe. That is a mechanical restriction, not a lung problem — and it is a small demonstration of what posture does to breathing all day.

A Self-Check, With Its Limits Stated

Sit quietly for a minute. Then consider how often each of the following is true for you:

• My breathing feels shallow, stuck, or like it does not reach where I want it to
• I often sigh or yawn
• I get tingling in my fingers or around my mouth
• I feel light-headed without an obvious reason
• I breathe through my mouth most of the time
• My shoulders rise when I take a deep breath
• My neck or jaw is often tense
• I get short of breath talking on the phone or reading aloud
• I catch myself holding my breath
• My chest feels tight when I am not exerting myself
• I wake unrefreshed
• I find it hard to walk and talk at the same time

What this list is: a prompt for a conversation with your doctor or a respiratory physiotherapist. Take it with you.

What it is not: a test. There is no score, no threshold, and nothing here diagnoses anything. The validated instrument for this is the Nijmegen Questionnaire, and even that is a subjective measure of functional respiratory complaints which clinicians are advised to complement with objective assessment (van Dixhoorn & Folgering, 2015). A cut-off above 19 is commonly used in adults; it has not been validated in children, adolescents, or in severe asthma populations (Barker et al., 2015).

Several things on the old version of this list — including conditions such as autism, seizures and stroke — implied that breathing pattern explains them. It does not, and they have been removed.

How It Is Properly Assessed

A respiratory physiotherapist or doctor assessing for dysfunctional breathing will typically look at:

• Breathing pattern observation — respiratory rate, the ratio of chest to abdominal movement, mouth versus nose breathing, inspiratory-to-expiratory ratio, posture, and how breathing changes during a task that provokes symptoms
• The Breathing Pattern Assessment Tool (BPAT), a semi-quantitative screen developed for this purpose (Todd et al., 2018)
• Objective measures — end-tidal CO₂ (reduced in hyperventilation), breath-hold time, pulse oximetry, spirometry
• Tests to exclude other causes — full lung function with bronchial provocation, exercise testing, echocardiography or imaging where indicated

One detail worth knowing: a resting oxygen saturation of 100% can be consistent with hyperventilation. Normal resting saturation is around 95–98%, so a reading of 100% at rest is not the "better" result people assume it is.

What Helps

Breathing retraining is the main treatment, and it is best delivered or at least supervised by a qualified professional — a respiratory physiotherapist in most health systems. Established approaches include the Papworth and BradCliff methods.

Two randomised controlled trials found that physiotherapy-delivered breathing retraining improved quality of life in people with incompletely controlled asthma (Bruton et al., 2018; Andreasson et al., 2022). It is worth being precise about that result: it improved quality of life, not the underlying asthma, and reviewers note the evidence base overall remains limited (Bondarenko et al., 2021).

The general principles of retraining are consistent across methods:

• Reduce respiratory rate and overall ventilation
• Breathe through the nose
• Allow a complete, unforced exhale
• Re-establish diaphragmatic rather than upper-chest breathing
• Address musculoskeletal and postural contributors
• Build aerobic fitness, which lowers the ventilation required at any given effort

Note what is not on that list: breathing bigger, harder, or deeper. Forcing a deeper breath is one of the common ways people make a dysfunctional pattern worse, because the effort recruits exactly the accessory muscles you are trying to stand down.

Where Our Work Fits

Michael Grant White spent four decades working on breathing development, and arrived at UDB as a description of what he had observed — including in himself — long before "dysfunctional breathing" became a term you could find in a respiratory journal. The Optimal Breathing Mastery Kit™ is a self-paced course built on that work: 40 exercises and techniques, guided sessions and physical training tools, aimed at changing a breathing pattern rather than treating a disease.

Being straight about what that is and is not:

• It is breathing education and training, not medical treatment, and it does not diagnose anything.
• It is not a substitute for assessment by a doctor or respiratory physiotherapist, particularly if your symptoms are new, worsening, or unexplained.
• It does not treat, cure or prevent any disease.
• If you have a diagnosed heart or lung condition, talk to your doctor before starting any breathing programme.

What it can reasonably offer is a structured way to work on the pattern itself — slower, lower, nasal, unforced breathing with a complete exhale — which is the same ground the clinical methods cover.

Frequently Asked Questions

Is UDB a real medical condition?

UDB is our term. The recognised clinical equivalent is dysfunctional breathing or breathing pattern disorder, which is well described in the respiratory literature. There is no universally agreed definition even among clinicians; a commonly cited one is "inappropriate breathing which is persistent enough to cause symptoms, with no apparent organic cause" (Clifton-Smith et al., 2011). It is not a disease — it is a functional disorder of how you breathe.

Can dysfunctional breathing cause disease?

No, and this is where a lot of breathing content goes wrong, including ours previously. Dysfunctional breathing produces symptoms — breathlessness, chest tightness, tingling, light-headedness — and it coexists with conditions like asthma at high rates. That is not the same as causing them. Asthma is driven by airway inflammation; heart disease, diabetes and neurological conditions have their own established causes. Breathing pattern is not among them.

How do I know whether I have it rather than something else?

You often cannot tell from symptoms alone, which is the whole difficulty — the symptoms overlap heavily with conditions that need treating. That is why it is a diagnosis of exclusion and why objective testing exists. If you have unexplained breathlessness, start with your doctor.

Is a low breath-hold time a sign of a problem?

A short comfortable breath-hold is used clinically as one indicator among several, not as a diagnosis on its own. Treat it as a single data point, and be wary of anyone who builds a whole health assessment on it.

Does breathing retraining replace my medication?

No. Never reduce or stop prescribed medication on the basis of a breathing programme. Where breathing retraining has been tested in people with asthma, participants continued their usual care — that is the context in which the quality-of-life improvements were found.

Why does bending over make breathing harder?

Because it mechanically restricts the movement of the diaphragm and the expansion of the ribs. It is a quick demonstration of how much posture contributes — and why postural work is part of breathing retraining rather than an afterthought.

A Note on Medical Advice

This page is general education about breathing patterns. It is not medical advice, a diagnosis or a treatment plan, and nothing here is intended to diagnose, treat, cure or prevent any disease. Breathlessness, chest pain and chest tightness can be symptoms of serious conditions. If you are experiencing them, see a doctor — and never stop or change prescribed treatment based on anything you read here.

Sources

• Boulding R, Stacey R, Niven R, Fowler SJ. Dysfunctional breathing: a review of the literature and proposal for classification. European Respiratory Review, 2016;25(141):287–294.
• Thomas M, McKinley RK, Freeman E, Foy C. Prevalence of dysfunctional breathing in patients treated for asthma in primary care: cross sectional survey. BMJ, 2001;322:1098–1100.
• Thomas M, McKinley RK, Freeman E, et al. The prevalence of dysfunctional breathing in adults in the community with and without asthma. Primary Care Respiratory Journal, 2005.
• Denton E, Bondarenko J, Tay T, et al. Factors associated with dysfunctional breathing in patients with difficult to treat asthma. Journal of Allergy and Clinical Immunology: In Practice, 2019.
• van Dixhoorn J, Folgering H. The Nijmegen Questionnaire and dysfunctional breathing. ERJ Open Research, 2015;1(1):00001-2015.
• Barker N, Everard ML. Getting to grips with dysfunctional breathing. Paediatric Respiratory Reviews, 2015.
• Todd S, Walsted ES, Grillo L, et al. Novel assessment tool to detect breathing pattern disorder in patients with refractory asthma. Respirology, 2018.
• Bruton A, Lee A, Yardley L, et al. Physiotherapy breathing retraining for asthma: a randomised controlled trial. The Lancet Respiratory Medicine, 2018.
• Andreasson KH, Skou ST, Ulrik CS, et al. Breathing exercises for patients with asthma in specialist care: a multicentre randomised clinical trial. Annals of the American Thoracic Society, 2022.
• Clifton-Smith T, Rowley J. Breathing pattern disorders and physiotherapy: inspiration for our profession. Physical Therapy Reviews, 2011.
• Kurukulaaratchy RJ, et al. Dysfunctional breathing in severe asthma: a multicentre analysis. Reported in the Severe Asthma Toolkit, Centre of Excellence in Severe Asthma. toolkit.severeasthma.org.au
• Bondarenko J, Hew M, Button B, et al. Dysfunctional breathing: assessment and management. Reported in the Severe Asthma Toolkit, Centre of Excellence in Severe Asthma. toolkit.severeasthma.org.au