When breathing seems like effort — but the tests are normal

"I cannot pull air all the way down." "It feels like I am breathing through a straw." "I need to sigh constantly to feel I have really breathed." These are recurrent phrases from patients with musculoskeletal dyspnea — a condition in which the sensation of shortness of breath exists in a real and distressing way, but spirometry is normal, the echocardiogram is normal, and the chest X-ray shows nothing. The patient leaves the cardiologist and the pulmonologist without a diagnosis, frequently receiving the label of "anxiety."

What many professionals do not investigate is the musculoskeletal component of breathing. The diaphragm — the main respiratory muscle — can develop trigger points at its costal insertions and crura, restricting its excursion and generating the sensation of incomplete breathing. The scalenes (anterior, middle, and posterior), when hyperactive from an apical breathing pattern, become the permanent "emergency breathing." The intercostals, when stiff, physically limit chest expansion. These are problems treatable with medical acupuncture and dry needling.

If you also feel back pain when breathing deeply or a sharp pain in the ribs when coughing or laughing, these symptoms frequently coexist with musculoskeletal dyspnea and share the same mechanisms.

How muscles generate shortness of breath

  1. Trigger points in the diaphragm

    The crura of the diaphragm (vertebral insertions at L1-L3) and costal insertions (ribs 7-12) can develop trigger points that restrict diaphragmatic excursion. The patient feels that "the air stops in the middle of the chest" — deep inspiration is physically limited by muscular restriction, not by pulmonary disease.

  2. Hyperactivation of the scalenes

    The scalene muscles (anterior, middle, and posterior) are accessory inspiration muscles, designed for use in situations of effort. In patients with chronic apical breathing (from anxiety, flexed posture, or diaphragmatic inhibition), the scalenes take on primary breathing — generating fatigue, cervical tension, and the sensation of constant effort to breathe.

  3. Intercostal stiffness

    The external and internal intercostal muscles control expansion and retraction of the rib cage. When they develop trigger points or fibrosis from disuse (sedentarism, kyphotic posture), thoracic compliance decreases. The result is a "stiff" rib cage that does not expand adequately, creating a sensation of respiratory restriction.

  4. Paradoxical breathing pattern

    The combination of inhibited diaphragm + hyperactive scalenes inverts the breathing pattern: instead of the abdomen expanding on inspiration (normal diaphragmatic pattern), the chest rises while the abdomen retracts. This paradoxical pattern is inefficient, increases the work of breathing, and perpetuates the sensation of dyspnea.

  5. Hyperventilation and respiratory alkalosis

    The sensation of "not being able to breathe deeply" leads to frequent sighs and compensatory hyperventilation, which causes mild respiratory alkalosis (reduction of CO₂). This generates perioral tingling, dizziness, and more anxiety — creating the dyspnea-anxiety-hyperventilation cycle that confuses the diagnosis.

Clinical data on musculoskeletal dyspnea

Relevant share
OF CHRONIC DYSPNEA
without cardiopulmonary explanation has a musculoskeletal component — including diaphragmatic dysfunction, intercostal stiffness, and trigger points in respiratory muscles, according to the musculoskeletal medicine literature
Frequent
IN THE SCALENES
finding of trigger points in patients with chronic apical breathing — may generate cervical pain, arm tingling, and perpetuate the dysfunctional breathing pattern
Reduction
OF DIAPHRAGMATIC EXCURSION
in patients with diaphragmatic dysfunction, normal excursion can decrease significantly, measurable by ultrasound of the diaphragm — normal parameters vary by protocol
Subjective improvement
DESCRIBED
in the sensation of dyspnea after a medical acupuncture protocol focused on release of the diaphragm and scalenes, combined with breathing reeducation, in case series — controlled trials are still limited

Recognizing musculoskeletal dyspnea

Critérios clínicos
08 itens

Typical pattern of dyspnea from muscular dysfunction

  1. 01

    Sensation of not being able to inspire deeply — "the air stops in the middle"

  2. 02

    Frequent and involuntary sighs throughout the day

  3. 03

    Shortness of breath that worsens after sitting for long periods and improves with movement

  4. 04

    Normal spirometry and cardiologic tests

  5. 05

    Tension or pain at the base of the ribs, epigastrium, or lateral cervical region

  6. 06

    Predominantly upper thoracic breathing — with shoulder elevation on inspiration

  7. 07

    Worsens in situations of stress, with associated anxiety component

  8. 08

    Sensation of "weight on the chest" or "tightness" without alteration on imaging

Myths about shortness of breath without apparent cause

Myth vs. Fact

MYTH

If heart and lung tests are normal, shortness of breath is psychological

FACT

Musculoskeletal dyspnea is real and physical — there is measurable restriction of diaphragmatic excursion and thoracic compliance. Trigger points in the diaphragm, scalenes, and intercostals physically limit respiratory mechanics. Anxiety frequently coexists and amplifies the sensation, but is not the primary cause when there is documentable muscular dysfunction. Treating only anxiety without addressing the musculoskeletal component produces partial results.

MYTH

The diaphragm cannot have trigger points because it is involuntary

FACT

The diaphragm is a striated skeletal muscle with mixed control (voluntary and automatic via the phrenic nerve, C3-C5). Like any skeletal muscle, it can develop trigger points, especially at its costal insertions and crura. Prolonged coughing, thoracic trauma, abdominal surgery, and chronic apical breathing are factors that predispose to the development of diaphragmatic trigger points.

MYTH

Post-COVID shortness of breath is always pulmonary sequela

FACT

Many patients with post-COVID dyspnea have normal chest CT and normal pulmonary function tests. In these cases, the cause is frequently diaphragmatic dysfunction (from prolonged disuse during the illness), deconditioning of respiratory muscles, and post-infection dysautonomia. Assessment of respiratory muscle mechanics — with diaphragm ultrasound and assessment of the scalenes — is essential to direct appropriate treatment.

The forgotten diaphragm

Treatment protocol

Assessment of respiratory mechanics
1st visit

Observation of breathing pattern (apical vs. diaphragmatic). Palpation of the diaphragm via costal insertions (bilateral subcostal). Assessment of the scalenes for trigger points and hypertonia. Diaphragmatic excursion test (hands over rib base). If available, diaphragm ultrasound for objective documentation.

Diaphragmatic and scalene release
Sessions 1–4

Deep needling of the bilateral subcostal region (costal insertions of the diaphragm) — points in the region of CV-12–CV-14, and Ashi points at the insertions. Dry needling of the anterior and middle scalenes with safety technique (lateralization of SCM for safe access). Electroacupuncture 2 Hz for neuromodulation of the phrenic nerve.

Intercostals and breathing reeducation
Sessions 4–7

Needling of intercostal trigger points (tangential technique for pleural safety). Guided diaphragmatic breathing exercises — hand on abdomen, inspiration with abdominal expansion, slow expiration. Pursed-lip expiration technique for restoration of physiologic breathing pattern. Auricular acupuncture for autonomic modulation and reduction of associated anxiety.

Maintenance and respiratory autonomy
Sessions 8–10+

Home program of diaphragmatic breathing (5 minutes, 3 times a day). Thoracic expansion exercises with costal mobilization. Spacing of sessions with monthly maintenance. Postural guidance to prevent return of the apical breathing pattern — especially for office workers in kyphotic posture.

Clinical pearl: the hand-on-abdomen test

Frequently asked questions

FREQUENTLY ASKED QUESTIONS · 04

Frequently Asked Questions

Absolutely yes. Shortness of breath can be a symptom of serious conditions — pulmonary embolism, acute coronary syndrome, heart failure, asthma, COPD, pneumonia, anemia — that require priority investigation. Musculoskeletal dyspnea is a diagnosis of exclusion, considered only after cardiologic evaluation (ECG, echocardiogram, troponin if indicated) and pulmonologic evaluation (chest X-ray, spirometry, O₂ saturation, D-dimer when there is suspicion of PE) confirm absence of serious cause. Sudden dyspnea, cyanosis, or chest pain are emergencies — seek the emergency department immediately.

When dyspnea is associated with anxiety, medical acupuncture can act on two fronts: in releasing the respiratory muscles that are physically restricting breathing (biomechanical component), and in autonomic neuromodulation via auricular acupuncture and points such as PC-6 and HT-7, which reduce sympathetic activation. This dual approach is particularly effective because it treats both the muscular cause and the autonomic amplification of anxiety.

Patients with post-COVID dyspnea and normal pulmonary tests frequently present with diaphragmatic dysfunction from prolonged disuse and deconditioning of the respiratory muscles. In these cases, medical acupuncture focused on diaphragmatic release and breathing reeducation has shown promising results. Treatment should be gradual, respecting the post-effort fatigue that many patients with post-COVID syndrome present.

Improvement is usually noticeable in the first 2–3 sessions, especially when there is effective diaphragmatic release — many patients report being able to "really breathe deeply" for the first time in months right after the session. For sustained improvement, 8–10 sessions with associated breathing reeducation are necessary. Daily practice of diaphragmatic breathing at home is essential to maintain the gains.