How Breathing Mechanics Change Neck Loading

The diaphragm is the primary muscle of respiration. When functioning optimally, it contracts with each inhalation and descends toward the abdominal cavity, generating the pressure gradient that draws air into the lungs while simultaneously contributing to spinal stabilisation through intra-abdominal pressure regulation. When diaphragmatic function is compromised — whether through habit, stress, pain, or postural restriction — the body compensates by recruiting the accessory breathing muscles of the neck and upper thorax: the sternocleidomastoid, scalenes, upper trapezius, levator scapulae, and pectoralis minor.

These muscles are not designed for the repetitive endurance demand of continuous breathing. Each breath cycle — 12 to 20 per minute at rest, over 20,000 breaths per day — adds a small increment of load to these already postural muscles. Over time, the cumulative effect is chronic low-grade contraction, progressive shortening, and the development of active myofascial trigger points throughout the cervical and upper thoracic musculature. The scalenes attach to the first and second ribs and the transverse processes of C3–C6; their overactivation produces a sustained compressive and shear load on the mid-cervical joints.

What the Research Shows

Multiple studies have now demonstrated a measurable relationship between breathing pattern disorders and cervicogenic pain. Patients with chronic neck pain show significantly higher resting activity of the scalenes and sternocleidomastoid during tidal breathing compared to asymptomatic controls, alongside reduced diaphragmatic excursion on ultrasound. Importantly, the relationship appears bidirectional: pain itself alters breathing through its effect on the autonomic nervous system and postural guarding, which further loads the cervical muscles and perpetuates the cycle.

The cervical spine also has a neurological relationship with breathing. The phrenic nerve — the primary motor supply to the diaphragm — arises from C3, C4, and C5. Referred pain and irritation patterns from the cervical spine can inhibit diaphragmatic activation, and conversely, diaphragmatic dysfunction can alter the afferent input from the cervicothoracic junction and contribute to central sensitisation of cervical nociceptive pathways.

The Hi-Lo test: Place one hand on the chest and one on the abdomen. During a relaxed inhalation, the abdominal hand should rise first and further, with minimal movement of the chest hand. Upper chest dominant breathing — where the chest hand rises first or more prominently — indicates predominance of accessory muscle breathing and a likely contribution to cervical loading.

Identifying Breathing-Related Neck Pain

Several clinical patterns suggest a breathing contribution to cervical symptoms. Neck pain that worsens with stress, anxiety, or sustained postures is often partly mediated through altered breathing. Persistent bilateral upper trapezius or suboccipital tension that does not fully resolve with manual therapy alone suggests that a driving mechanism — such as habitual upper chest breathing — remains unaddressed. Cervicogenic headaches with a strong postural and emotional component frequently have a breathing component. Tension-type headaches associated with work stress, screen use, and poor sleep (all of which alter breathing patterns) are another common presentation.

Restoring Diaphragmatic Function

The treatment of breathing-related neck pain requires both addressing the cervical musculature directly and restoring normal diaphragmatic breathing mechanics. Manual therapy — joint mobilisation of the cervical and thoracic spine, myofascial release of the scalenes, suboccipitals, and pectoralis minor, and rib mobilisation — reduces the mechanical restriction perpetuating the pattern. Diaphragmatic retraining begins in supine with tactile feedback (hands on lower ribs, resisted abdominal breathing) and progresses to sitting, standing, and finally functional activities and exercise. Addressing the psychological and autonomic drivers — stress, anxiety, sleep disruption — is essential for sustained resolution.

References & Further Reading

  1. Kapreli E, et al. Respiratory dysfunction in chronic neck pain patients. Cephalalgia. 2009;29(7):701–710.
  2. Perri MA, Halford E. Pain and faulty breathing: a pilot study. J Bodywork Mov Ther. 2004;8(4):297–306.
  3. Dimitriadis Z, et al. Respiratory function in patients with chronic neck pain. Clin Respir J. 2013;7(3):304–311.