Chiropractic BioPhysics (CBP): What the Research Shows

Single-center RCT: adding Denneroll cervical extension traction in neck-pain patients with reduced lordosis restored curve and produced lasting reductions in dizziness and neck pain at 1 year, while the no-traction group regressed.

Small pilot RCT in cervicogenic headache: restoring cervical alignment gave headache/disability gains sustained at 2 years vs a control group that regressed. Preliminary — pilot-sized, needs larger replication.

Small single-center RCT in cervical spondylotic radiculopathy: adding cervical extension traction improved nerve-root function (evoked potentials), pain, and opioid use, with benefits held at 2 years.

Feasibility pilot RCT of a 3D posture-corrective orthotic added to usual care for nonspecific neck pain; establishes the protocol is workable rather than proving effectiveness, so results are preliminary.

Single-center RCT: for L5-S1 disc-related leg pain, adding lumbar extension traction beat hot packs/interferential therapy alone on pain, disability, and H-reflex, with gains maintained at 6 months.

Single-center RCT: adding lumbar extension traction to standard care increased lumbar lordosis and improved pain and disability in chronic mechanical low back pain, with differences held at follow-up.

Single-center RCT: restoring lumbar lordosis with extension traction improved pain, disability, and segmental spinal motion versus controls in chronic mechanical low back pain.

Single-center RCT: adding a posture-corrective program to correct forward head posture improved arm/nerve-root pain and function in cervical spondylotic radiculopathy versus controls at 6 months.

Single-center RCT: correcting forward head posture alongside standard care improved outcomes in lumbosacral radiculopathy, suggesting whole-spine posture may matter for low-back nerve pain.

Single-center RCT: adding cervical alignment correction to standard therapy produced better, more durable relief for low-back radiculopathy at 6 months, supporting a whole-spine approach.

Single-center RCT: adding a cervical extension-traction orthotic to multimodal rehab improved pain, disability, and nerve-root function in discogenic cervical radiculopathy, with gains sustained at long-term follow-up.

Single-center RCT comparing two cervical traction setups within a multimodal program for discogenic cervical radiculopathy, informing which traction approach yields better outcomes.

Single-center RCT: correcting excessive thoracic kyphosis improved chronic nonspecific neck pain and function short- and long-term versus controls, supporting that posture beyond the neck affects neck pain.

RCT focused on physiological measures: in patients with neck pain and reduced cervical curve, restoring lordosis improved autonomic function and sensorimotor control versus controls, rather than symptom scores alone.

Placebo-controlled RCT in asymptomatic subjects: restoring cervical lordosis altered nerve-conduction timing and brain-response measures. Mechanistic evidence about the curve's effect on nervous-system function, not a pain-outcome study.

A small RCT in collegiate athletes tested whether postural/alignment correction improves speed and power; results were mixed and did not clearly show a performance benefit. Preliminary, not proof.

A comparative (non-randomized) study: neck-pain patients with greater mid-back rounding had worse autonomic function, disability, and sensorimotor control. Shows association, not cause and effect.

Systematic review synthesizing the small set of CBP lumbar-traction controlled trials, reporting ~7-11 degrees lordosis gain with maintained pain/disability relief. Useful summary but authored by CBP proponents on a limited evidence base.

Systematic review of cervical extension traction controlled trials, finding consistent curve restoration with sustained symptom relief. CBP-affiliated authorship and a modest number of small trials limit strength.

Systematic review and meta-analysis finding forward head posture is associated with neck pain in adults (but not adolescents). Establishes correlation, not causation.

A narrative overview of Chiropractic BioPhysics written by the method's own developers, summarizing its protocol and supporting studies. It is a proponents' review, not an independent or truly systematic appraisal, so read it as the technique's own case rather than neutral evidence.

An independent systematic review and meta-analysis concluding that certain X-ray methods (the Cobb and absolute rotation angle methods) are highly reliable for measuring neck posture in the sagittal view. Neutral, non-CBP-affiliated confirmation that the core measurement approach is reproducible.

Independent systematic narrative review of 16 studies finding posture-correcting programs and manual therapy can improve pain and disability in chronic neck pain with forward head posture, while noting variable study quality. Supports the general posture-and-neck-pain rehabilitation approach.

Independent systematic review and meta-analysis of 26 studies; found craniovertebral angle differs meaningfully between people with and without neck pain, but other posture measures need more research. Shows the posture-pain relationship is more nuanced than often claimed, valuable for honest framing.

Independent systematic review and meta-analysis establishing normative values for cervical sagittal alignment parameters, drawn largely from the surgical literature. Describes what 'normal' alignment looks like rather than testing chiropractic treatment; best used as background on why alignment is measured.

Independent umbrella review concluding the evidence does not establish that spinal posture causes low back pain. A counterweight that cautions against overstating posture-correction claims.

Independent systematic critical review of the epidemiological literature that found the evidence linking sagittal spinal curves to health or pain is insufficient and inconsistent. A useful skeptical counterpoint to the premise that abnormal curves cause symptoms.

Independent panel review of how chiropractors decide where to treat; it found postural evaluation only partially supported and rated x-rays and several other common assessment tools as having mixed or unfavorable evidence. Cautions against over-reliance on some CBP-style assessment methods.

Independent narrative review arguing routine spinal x-rays are justified only for red flags (trauma, deformity screening, suspected serious pathology) and warning of radiation and over-treatment harms. Directly challenges the routine-radiography approach used in CBP practice.

A CBP-proponent opinion/commentary piece (non-neutral authors; Harrison is central to CBP) arguing that spinal x-ray radiation risk is overstated. Not neutral evidence; should be presented alongside the skeptical Jenkins review so readers see both sides of the imaging debate.

Reliability study showing the Harrison posterior-tangent method measures cervical curvature more consistently than the Cobb method. Validates a measurement tool, not a treatment outcome.

A systematic review finding that the X-ray measurements used to assess lumbar and pelvic alignment are generally reliable. Supports measurement methods rather than testing any treatment.

An analysis exploring whether a mismatch between pelvic shape and lumbar curve helps distinguish chronic low-back-pain patients. Examines a diagnostic marker, not a treatment outcome.

An analysis of neck-pain patients found forward-head-posture magnitude and patient factors predict who improves with rehabilitation. Prognostic/patient-selection value, not a test of treatment effectiveness.

A reliability study of three X-ray techniques for measuring thoracic kyphosis, finding the posterior tangent method most reliable. A measurement-methods paper, not a treatment study.

Establishes normal reference values for lumbar-spine curvature from a normal population and synthesizes prior lordosis data. Defines 'normal' alignment; not evidence about treatment.

A follow-up reliability analysis reporting high reproducibility (crossed ICCs) for the Harrison line-drawing methods on AP and lateral X-rays. Supports measurement consistency, not clinical effectiveness.

A cross-sectional modeling study finding neck-pain groups had flatter cervical curves (hypolordosis) than asymptomatic subjects, and that geometric modeling can discriminate the two. Describes an association and a measurement method, not a treatment effect.

Shows the normal thoracic kyphosis can be closely approximated by an elliptical shape in asymptomatic people. A modeling paper underpinning CBP's 'ideal spine' geometry, not a clinical outcome study.

A geometric-modeling study concluding the normal lumbar curve is well approximated by a portion of an ellipse. Supports the mathematical basis for CBP's normal-spine model; not a study of patients or treatment.

Examines how repeatable posture, X-ray positioning, and line-drawing measurements are over time across six control groups. A reliability/measurement paper relevant to interpreting follow-up X-rays, not a treatment trial.

A reliability study of digitized measurement of front-view lumbopelvic X-rays used in CBP analysis. Establishes measurement consistency, not clinical benefit.

An early reliability study showing different examiners measuring side-view lumbar X-rays with the CBP procedure get consistent results. A foundational measurement-reliability paper, not evidence of treatment effect.

A biomechanical modeling study estimating how spinal stresses change with cervical curvature and forward translation. Theoretical/engineering modeling that motivates the 'ideal alignment' rationale, not patient outcome data.

Examines the mathematical assumptions behind CBP's ideal normal cervical spine model. A theoretical methods paper defining the reference model, not a clinical study.

A conceptual/methods paper arguing that a normal sagittal spinal alignment is a reasonable clinical goal and describing the model for it. Sets out rationale and definitions rather than testing outcomes in patients.

Compares measured cervical curves against a theoretical ideal model, supporting the model as a description of normal lordosis. A modeling/normative paper, not a treatment study.

A biomechanical study modeling how the shape of the spine affects disc loads and stresses in asymptomatic adults. Provides theoretical support for an 'ideal' alignment but does not test clinical treatment.

A measurement-validation study of a computerized method for describing 3-D pelvic posture from standard digital photos. It concerns assessment accuracy, not treatment outcomes.

A reliability study of the PosturePrint system for measuring standing posture in 3-D, reporting acceptable examiner agreement. Supports measurement consistency, not treatment effectiveness.

A validation study comparing a non-X-ray flexicurve tool against radiographic measurement of the cervical curve. It addresses measurement accuracy, not patient treatment outcomes.

A measurement study comparing cervical alignment values from full-spine versus cervical-only X-rays. Relevant to imaging protocol consistency, not to treatment effectiveness.

A reliability/validity study using an AI (deep neural network) method to measure cervical alignment on X-rays. It concerns measurement technology, not whether treatment relieves symptoms.

A small case series with the rare feature of pre- and post-collision imaging, documenting recovery of cervical alignment and symptoms after CBP care. A handful of patients with no control group, so it is observational only.

A self-described selective (non-systematic) review pooling patients from CBP case reports, reporting average gains in lordosis and reduced pain. Because it aggregates uncontrolled case reports by the technique's own proponents, it summarizes low-level evidence, not trial data.

A small case series reporting improved cervical canal diameter, alignment and neck disability after CBP care. Observational with no control group, so the associations are suggestive rather than causal.

A larger multicenter retrospective series of whiplash patients linking CBP-driven gains in cervical alignment to recovery. Being retrospective and uncontrolled, it shows a pattern but cannot prove the alignment change caused the improvement.

A retrospective, uncontrolled case series of degenerative-disc patients reported increased cervical disc height with reduced neck pain and disability after CBP rehabilitation. No control group, so it shows correlated improvements, not proven cause and effect.

A small series of older adults with lumbar spondylolisthesis showed reduced slippage and improved pain, quality of life, and urinary symptoms held past one year. Uncontrolled, so it suggests promise but cannot prove cause and effect.

A multicenter prospective series of disc-herniation radiculopathy patients found lumbar coronal balance associated with rehabilitation outcomes. Uncontrolled observational data; shows an association, not a proven treatment effect.

A retrospective series of 117 patients with lumbar anterolisthesis reported reduced slippage and better physical and mental quality of life after CBP care. Large but uncontrolled, so it cannot prove the treatment caused the change.

Reports Cobb-angle reduction and back-pain relief in five adults with lumbar/thoraco-lumbar scoliosis using a refined CBP mirror-image protocol. A small uncontrolled series cannot establish that CBP caused the change.

Ten patients averaged roughly an 11-degree reduction in thoracic hyperkyphosis over about nine weeks of CBP mirror-image extension traction and exercise. Retrospective and uncontrolled: shows feasibility, not superiority.

A small retrospective case series reported increased brain blood-flow signal on MRI after neck-curve correction. Uncontrolled, uses an imaging surrogate for blood flow; hypothesis-generating only.

A small case series reporting reduced thoracic scoliosis in a few adults after CBP mirror-image blocking. No control group, so results are preliminary and not proof of effectiveness.

A retrospective series of 41 patients documenting loss of cervical lordosis on X-rays after car crashes. It describes an association in one clinic's records, not a controlled comparison or treatment outcome.

A single-arm prospective cohort study (not a review, no control group) that found no meaningful change in cervical curvature after four weeks of spinal manipulation, with large measurement error. Honest counter-evidence that manipulation alone does not reliably reshape the cervical curve.

Single-patient case report: a 57-year-old woman's 30-year chronic dizziness, neck pain, and headaches eased as CBP traction increased cervical lordosis over 12 months. One patient only, so suggestive, not proof of cause and effect.

Single-patient case report: post-traumatic dizziness and neck pain improved alongside a restored cervical curve, holding at one year. As one case it cannot rule out other explanations for recovery.

Single-patient case report: cervical radiculopathy resolved after CBP care reduced forward head posture and rebuilt the cervical curve. A single case shows a possible outcome, not a reliable treatment effect.

A single case with the rare feature of both pre- and post-crash cervical X-rays, documenting a whiplash-related loss of curve that CBP care partly restored. The before/after imaging is unusual, but it remains one uncontrolled patient.

One whiplash patient improved with CBP extension traction after standard chiropractic care had failed. A single case report; it suggests the approach may help some non-responders but does not establish it.

A single pediatric case in which neck pain and chronic headaches eased after CBP restored the cervical curve, sustained at 17 months. One child only, so it is illustrative rather than proof.

One chronic-migraine patient reported symptom resolution alongside improved cervical curve after CBP care. A single case report; encouraging but not generalizable evidence for migraine.

A single young adult's sporadic hemiplegic migraine and neck disability improved after CBP corrected a cervical kyphosis. One patient with an uncommon condition, so it is a hopeful anecdote, not proof.

An unusual single case using CBP to reduce an excessive (hyper) cervical curve rather than build one, with migraines and neck pain resolving in one adolescent. One patient, so it mainly shows the method can be applied in both directions.

One patient with post-crash neck pain and arm radiculopathy gained cervical lordosis and reported symptom relief maintained at one year with CBP care. A single case report, so it demonstrates a possible outcome only.

A single patient's chronic neck and low-back pain improved as CBP care increased cervical lordosis and reduced lumbar scoliosis, holding at 26 months. One case, so results may not transfer to others.

A single patient with advanced cervical osteoarthritis gained cervical curve and symptom relief with CBP traction. As a one-patient case report, it shows possibility, not a general expectation.

One patient's MRI-confirmed L4-L5 disc herniation/sequestration and sciatica resolved after ~6 weeks of CBP lumbar extension traction, with no relapse at 8 years. A single case, not proof it works for most patients.

One patient with excessive lumbar curve and forward posture reported reduced low-back pain after CBP exercises, traction, and adjustments. A single case cannot establish typical results.

A single adolescent's back pain and thoraco-lumbar alignment improved on follow-up X-ray after CBP care. One patient only; results may not generalize.

One 57-year-old man's lumbar retrolisthesis and anterolisthesis reduced on X-ray with relief of low-back pain and sciatica after CBP care. Radiographic change in a single patient is not proof of general effectiveness.

A single patient showed reduced spondylolisthesis and improved pain and quality of life after CBP structural rehabilitation. One case only; illustrative, not confirmatory.

One pediatric patient's excessive lumbar curve reduced with symptom improvement after a course of CBP care. A single-child case, not evidence for children generally.

One adolescent athlete's low-back pain eased as thoraco-lumbar alignment improved with CBP care. A single case; outcomes in others are unknown.

One patient with persistent pain after back surgery improved in pain, disability, and spinal balance and held gains at 6 years with CBP care. A single case, not a controlled comparison.

One young man with pain after a failed lumbar fusion improved in pain, function, and quality of life over six months of CBP care. A single case, not proof for post-surgical patients broadly.

One patient with chronic low-back and neck pain unresponsive to years of manipulation improved with CBP rehabilitation and held gains at one year. A single case, not a controlled result.

A single 15-year-old girl whose thoracolumbar scoliosis Cobb angle improved with CBP mirror-image traction, blocking and exercises after standard chiropractic care failed. A one-patient report is suggestive, not proof.

One woman with neck and back pain, headaches and slouched posture showed reduced thoracic hyperkyphosis after six months of CBP mirror-image care. A single case cannot show the approach works reliably for others.

One young man with straight-back syndrome whose thoracic curve was increased and whose breathlessness and spinal pain eased, holding at follow-up. An individual case, not controlled evidence.

Reports whole-spine sagittal alignment improvement in one symptomatic Scheuermann's-disease patient treated with CBP. A single case suggests possibility, not proven effectiveness.

One older adult whose thoracolumbar kyphosis, forward sagittal balance and sensorimotor control improved with CBP care. Single-patient findings cannot be generalized.

A single case: one patient with severe chronic mid-back pain improved after CBP correction of thoracic sagittal alignment when prior care had failed, sustained at nine months. Not controlled proof.

A single case: one patient's chronic spine pain and headaches lessened as forward head posture and thoracic hyperkyphosis were reduced with CBP. Illustrative only.

A single case: one patient's lateral thoracic translation posture (pseudoscoliosis) was corrected with CBP mirror-image methods, with low-back-pain relief. Does not establish general effectiveness.

A single case: one post-fusion patient's pain and disability improved after CBP mirror-image correction of a lateral head-translation posture, with long follow-up. Hypothesis-generating, not definitive.

A single case: posture improvement and symptom relief in one patient with Parkinson's-related postural deformity using CBP methods. Cannot show generalization.

A single case linking scoliosis and neck posture to dystonia-type symptoms, with improvement after alignment-focused care. Illustrative only, not evidence of a reliable effect.

A single-patient case report linking cervical lordosis restoration to relief of cervicogenic headache. One case suggests a possible connection but cannot prove cause and effect.

A single-patient case report describing resolution of dizziness, fainting, and neck pain after cervical lordosis restoration. Illustrative anecdote only; no comparison group.

A single-patient case report describing conversion of a cervical kyphosis to a lordosis with CBP care in an asymptomatic young woman. One case, focused on structural change rather than symptom relief.