Back pain can absolutely affect your breathing, and it does so through several distinct pathways. A stiff thoracic spine limits how much your rib cage can expand. A sore lower back changes how your diaphragm works. A compressed nerve in the neck can partially paralyze the muscle you breathe with. The connection runs in both directions, too: people with chronic lung disease develop back pain at much higher rates than the general population. The relationship is more layered than most people realize, and understanding it can change how you manage either problem.
The Diaphragm Does Two Jobs at Once
Your diaphragm is best known as the dome-shaped muscle beneath your lungs that pulls air in when it contracts. But it also plays a major role in stabilizing your trunk. When you lift something heavy, brace yourself against a push, or simply stand upright on an uneven surface, your diaphragm contracts to raise the pressure inside your abdomen, helping keep your spine steady.1Journal of Bodywork and Movement Therapies. Diaphragm and core stabilization exercises in low back pain: A narrative review This dual role means the diaphragm is constantly juggling two competing demands, and when one demand increases, the other can suffer.
People with chronic low back pain tend to recruit their diaphragm more for spinal stability and less efficiently for breathing. The diaphragm is crucial for respiration yet simultaneously plays a significant role in trunk stabilization during postural tasks.2Scientific Reports. Diaphragm excursion and thickness in patients with chronic low back pain with and without lumbar instability In practice, this means someone with a painful lower back may breathe more shallowly without ever noticing the shift. They are not consciously guarding their breath; their nervous system is prioritizing keeping the spine safe. Whether the diaphragm itself physically changes in people with low back pain is still debated: some studies report reduced movement range, but a critical appraisal of the available evidence found that results on diaphragm excursion were inconsistent, with only one study reporting significant differences while three others showed none.3PubMed. Diaphragm Thickness and Excursion in Nonspecific Low Back Pain: A Critically Appraised Topic So the diaphragm may not shrink or weaken measurably in every case, but its functional behavior shifts in ways that can leave you feeling short of breath during activities that shouldn’t be demanding.
Thoracic Stiffness and Rib Cage Expansion
The twelve vertebrae of your mid-back (the thoracic spine) are directly attached to your ribs. When those joints stiffen, whether from arthritis, poor posture, injury, or just years of sitting, the entire rib cage loses some of its ability to expand. Reduced thoracic vertebral mobility and structural changes in the thoracic and lumbar angles adversely affect chest expansion and respiratory function.4PubMed Central. The effect of thoracic region self-mobilization on chest expansion and pulmonary function The muscles around the chest wall can become chronically stiff as a result, further limiting how deeply you can inhale.
This is one of the most intuitive links between back pain and breathing: your ribs literally cannot swing outward as far as they should. People with mid-back pain often describe a feeling of tightness across the chest that they initially mistake for a heart or lung problem. Musculoskeletal structures of the thoracic wall and neck are, in fact, a relatively common source of chest pain that gets mistaken for conditions like angina or pleurisy.5PubMed Central. Musculoskeletal chest wall pain The pain itself also contributes: even when the joints technically can move, sharp or aching pain on inhalation discourages full breaths. Over weeks and months, this pain-guarding pattern can reduce your baseline breathing capacity.
When a Neck Problem Affects Your Breathing Muscle
The phrenic nerve, which controls the diaphragm, originates from the third through fifth cervical nerve roots in your neck. That means problems in the cervical spine can directly impair your ability to breathe. In one documented case, cervical spondylosis compressed the right C4 nerve root badly enough to partially paralyze that side of the diaphragm. Imaging showed the right diaphragm was elevated, and nerve conduction testing confirmed the phrenic nerve on that side had lost more than half its signaling strength.6PubMed Central. Hemidiaphragmatic Paralysis Due to Cervical Spondylosis: A Case Report
This is not a common occurrence, but it is underrecognized. A review of the literature on phrenic nerve dysfunction from cervical narrowing concluded that cervical stenosis may be related to phrenic nerve dysfunction in select patients with otherwise unexplained diaphragmatic paralysis or pulmonary symptoms, and that surgical decompression can improve both lung function and neurological symptoms.7World Neurosurgery. Phrenic Nerve Dysfunction Secondary to Cervical Neuroforaminal Stenosis: A Literature Review If you have neck pain alongside unexplained breathlessness or a feeling that one side of your chest isn’t pulling its weight, this is a connection worth raising with a doctor.
Breathing Pattern Disorders and the Pain-Anxiety Loop
Back pain does not just restrict breathing mechanically. It can reshape the way you breathe at a neurological level. Breathing pattern disorders, where someone habitually overbreathes or breathes in a shallow, erratic rhythm, are more common in people with chronic pain. These patterns automatically increase levels of anxiety and apprehension, which can alter motor control and markedly influence balance.8Journal of Osteopathic Medicine. Breathing pattern disorders, motor control, and low back pain The extreme form of this is hyperventilation, which triggers a cascade of physiological changes: reduced oxygen delivery to tissues, smooth-muscle constriction, heightened pain perception, sped-up spinal reflexes, increased excitability of the nervous system, and shifts in calcium and magnesium levels that can promote development of tender, knotted trigger points in muscles.
The result is a feedback loop that can be difficult to break. Pain causes shallow or rapid breathing. Disordered breathing amplifies the perception of pain. Heightened pain drives more guarded breathing. This is not a psychological weakness; it is a well-documented physiological chain reaction. Anyone who has noticed that their back hurts more on days when they feel anxious or stressed is likely experiencing some version of this cycle.
Posture, Spinal Curves, and Lung Capacity
A pronounced forward curvature of the upper back, called hyperkyphosis, physically reduces the space available for your lungs. A long-term study from the Framingham cohort tracked how kyphosis severity affected lung function over sixteen years. In women, greater kyphosis was associated with steeper declines in the volume of air they could forcefully exhale in one second: women in the most severe kyphosis group lost roughly 100 milliliters more lung capacity than those in the mildest group.9PubMed Central. Severity of Kyphosis and Decline in Lung Function: The Framingham Study Interestingly, the same association was not statistically significant in men, though the reasons for that sex difference are not fully understood.
In people with more severe thoracic kyphosis, the correlation between the degree of curvature and reduced lung capacity measures was strong and consistent.10PubMed. Clinical Features and Outcomes of Respiratory Complications in Patients with Thoracic Hyperkyphosis This has practical implications: if you spend years hunched over a desk, your upper back gradually rounds, and that rounding does not just cause stiffness and soreness. It progressively shrinks the room your lungs have to inflate. A condition like ankylosing spondylitis, which fuses the spinal joints over time, makes this relationship especially stark. In patients with the disease, chest expansion was significantly associated with vital lung capacity.11PubMed Central. Relation between chest expansion, pulmonary function, and exercise tolerance in patients with ankylosing spondylitis
Scoliosis and Breathing in Younger People
Spinal curvature does not only affect older adults. Adolescent idiopathic scoliosis, the most common form of scoliosis in teenagers, can also impair lung function when the curves are large enough. A systematic review and meta-analysis found that larger thoracic curve angles, greater vertebral rotation, and loss of the normal front-to-back kyphosis were all significantly associated with worse pulmonary function in these patients.12PubMed. Is impaired lung function related to spinal deformities in patients with adolescent idiopathic scoliosis? A systematic review and meta-analysis The scoliosis deformity changes the shape of the thoracic cavity itself, reducing the space for the lungs to fill.13PubMed. Pulmonary function tests correlated with thoracic volumes in adolescent idiopathic scoliosis
Most teenagers with mild scoliosis will never notice breathing trouble. But for those whose curves progress into more severe territory, the respiratory impact becomes a genuine clinical concern, and it is one of the reasons doctors monitor curve progression closely and sometimes recommend bracing or surgery before maturity, not just for cosmetic reasons but to preserve chest volume and lung function during a period of rapid growth.
Chronic Lung Disease Makes Back Pain More Likely, Too
The relationship between back pain and breathing problems flows in both directions. People with chronic obstructive pulmonary disease (COPD) are significantly more likely to have chronic back pain than the general population. In a large population-based study, the prevalence of chronic low back pain was about 45% among COPD patients compared with roughly 28% among controls. After adjusting for other factors, COPD patients had nearly double the risk of chronic low back pain.14PubMed Central. COPD is Associated with Higher Prevalence of Back Pain: Results of a Population-Based Case–Control Study
A Swedish general-population cohort study reinforced this finding from the other direction: people with COPD had roughly twice the risk of developing troublesome low back pain, and those with both asthma and concurrent COPD had more than triple the risk.15PubMed. Are respiratory disorders risk factors for troublesome low-back pain? A study of a general population cohort in Sweden The mechanisms likely include chronic coughing straining the back muscles, reduced physical activity leading to deconditioning, increased use of the diaphragm for breathing at the expense of spinal stability, and systemic inflammation that affects both tissues. If you have a diagnosed lung condition and develop back pain, or you have chronic back pain and notice increasing breathlessness, treating the two as isolated problems misses half the picture.
Breathing Exercises and Inspiratory Muscle Training
Given that the diaphragm serves both breathing and spinal stability, training it more effectively can help on both fronts. Inspiratory muscle training (IMT), where you breathe against a calibrated resistance, has shown promise for people with chronic low back pain. A randomized controlled trial in athletes with chronic low back pain found that IMT improved respiratory function, increased core muscle activity, and reduced pain intensity.16PubMed. Inspiratory Muscle Training in Rehabilitation of Low Back Pain: A Randomized Controlled Trial
A separate study found that high-load IMT changed how people with low back pain used sensory information for balance. After training, participants relied less on ankle-based balance cues and more on signals from their back muscles, suggesting the training helped restore a more normal pattern of trunk control. They also reported less severe pain.17PubMed. Inspiratory muscle training affects proprioceptive use and low back pain These are not enormous trials, and IMT is not a cure-all, but the logic is sound: if your diaphragm gets stronger at its breathing job, it has more capacity left over for its stabilizing job, and the tug-of-war between the two functions becomes less of a problem.
Diaphragmatic breathing exercises, even without a resistance device, can help people who sit for long periods. Prolonged sitting increases fatigue in the deep trunk muscles, which can reduce spinal support and contribute to pain. Diaphragmatic breathing raises intra-abdominal pressure and reactivates those deep stabilizers.18Frontiers. Diaphragmatic breathing exercises in recovery from fatigue-induced changes in spinal mobility and postural stability: a study protocol It is a low-cost intervention that can be done at a desk, and while the evidence base is still growing, it aligns well with what we know about how the diaphragm works.
What About Spinal Manipulation and Manual Therapy
If thoracic stiffness limits breathing, it is natural to wonder whether loosening up the mid-back through manual therapy could help. The picture here is mixed. One study found that thoracic spinal manipulation produced immediate, statistically significant increases in forced vital capacity and forced expiratory volume in patients, while a sham-treatment group showed no change.19PubMed Central. The immediate effects of spinal thoracic manipulation on respiratory functions A pilot study in inactive older adults also found that repeated manipulation sessions led to a significant increase in maximal voluntary ventilation by the third session.20PubMed Central. Changes in pulmonary function following thoracic spine manipulation in a healthy inactive older adult population—a pilot study
But a more rigorous study testing manual therapy in healthy adults found no statistically significant changes in pulmonary function at any time point, and the authors concluded their findings do not support using manual therapy for short-term respiratory benefit in people without underlying dysfunction.21Scientific Reports. The effect of manual therapy on pulmonary function in healthy adults The difference probably matters: manual therapy may help when something is restricted (stiff joints, guarded muscles, pain-limited expansion) but has little to offer when the system is already working normally. This is a pattern that makes intuitive sense. If your rib cage moves fine, there is nothing for manipulation to unlock. If pain and stiffness are genuinely limiting your chest expansion, restoring some of that movement may translate into easier breathing.
Respiratory Risk After Spine Surgery
For people whose back problems require surgery, breathing complications are a recognized and monitored risk. A study of over 1,600 spine surgery patients found that about 9% developed a respiratory complication, with pre-existing COPD, congestive heart failure, diabetes, older age, and surgery on the thoracic spine all identified as significant risk factors.22PubMed Central. Risk factors for pulmonary complications after spine surgery Evidence of clinical or subclinical lung injury triggered by spine surgical procedures is an emerging area of concern.23PubMed Central. Pulmonary complications after spine surgery
Even for lumbar procedures, which are further from the lungs, respiratory complications are not negligible. A review of lumbar surgery outcomes found an overall respiratory complication rate of about 6% within one month, with pulmonary collapse being the most common issue. More invasive multilevel procedures carried the highest rates.24PubMed Central. Incidence of Respiratory Complications Following Lumbar Spine Surgery General anesthesia, post-operative pain limiting deep breathing, and reduced mobility during recovery all contribute. For anyone facing spine surgery, especially those with existing lung conditions, pre-operative breathing exercises and early post-operative mobilization are standard strategies to reduce these risks.
When Back Pain Is Not What It Seems
One underappreciated wrinkle is that pain felt in the back can sometimes originate from internal organs rather than the spine itself. The nervous system routes pain signals from organs through the same spinal segments that serve the overlying muscles and skin, creating what is called a viscerosomatic reflex. A nociceptive signal from an organ converges in the spinal cord with signals from the body wall, and the brain interprets the result as back or chest-wall pain. Documented cases include a splenic cyst producing persistent thoracic back pain that was initially treated as a musculoskeletal problem. The referred pain area can develop genuine muscle tenderness and tissue changes, making the deception even more convincing.8Journal of Osteopathic Medicine. Breathing pattern disorders, motor control, and low back pain
This matters for the breathing question because lung and heart conditions can present as upper back or chest-wall pain, leading someone to assume they have a musculoskeletal problem when the real issue is pulmonary or cardiac. Equally, a musculoskeletal issue can produce chest tightness that mimics a lung problem. If your back pain came on suddenly, is accompanied by significant breathlessness or cough, or does not respond to typical musculoskeletal treatments, investigating the lungs and heart is reasonable rather than continuing to treat the spine alone.