Chiropractic

Hazel J Jenkins et al. (2026) · Chiropractic & manual therapies

This pilot randomised trial with 20 patients and 11 chiropractors explored whether it is practical to run a large study asking a simple question: does taking spinal x-rays change outcomes for people receiving chiropractic care for back or neck pain? In medical settings, trials have found routine imaging does not improve non-specific low back pain, yet chiropractors use x-rays at widely varying rates (8% to 84%), partly to screen for reasons spinal manipulation might be unsuitable. No randomised trial had tested imaging where manipulation is also part of care, so the authors first tested whether such a trial could work. Chiropractors in Sydney, Australia, invited adults with a new episode of spinal pain, where the chiropractor was unsure whether an x-ray was needed. A computer randomly assigned each consenting patient to get spinal radiographs or not, and everything else, including manipulation, was decided between chiropractor and patient. Pain, disability (Roland Morris Disability Questionnaire for the back, Neck Disability Index), satisfaction and side effects were collected at 2, 6 and 12 weeks, and chiropractors were interviewed about the experience. Recruitment was the main difficulty: 135 patients were screened, 33 (24%) were eligible and 20 took part, short of the 50 planned. Three of 10 patients assigned to imaging did not get it, and 2 of 10 assigned to no imaging did, always after a clinical change. Follow-up fell from 90% of patients at 2 weeks to 75% at 12 weeks. Pain and disability fell in both groups, but differences between groups were small and the trial was too small to compare them. Mild, short-lived side effects such as muscle soreness affected 4 of 20 participants (1 imaging, 3 no imaging). The authors judged that most criteria for a larger trial were met but recruitment and cross-over would need strategies, since COVID-19, time pressure and discomfort explaining diagnostic uncertainty to patients limited enrolment. Limitations include a self-selected group of chiropractors, probably non-consecutive recruitment and mostly young, low-disability participants.

Rita Chiaramonte et al. (2026) · The Journal of manual & manipulative therapy

This systematic review of 18 randomized controlled trials explored whether hands-on treatment eases pain and improves jaw movement in adults with temporomandibular disorders (TMD). TMD is a group of conditions affecting the jaw joint, the chewing muscles and nearby tissues, and it is estimated to affect about 31% of adults. Its subtypes include muscle pain (myalgia), disc displacement (the cushioning disc slips out of position, sometimes locking the jaw) and joint pain. Manual therapy covers thrust manipulation, soft-tissue release, massage and intra-oral techniques, delivered by physiotherapists, chiropractors, osteopaths, dentists and physicians. The review asked which techniques help most and whether results differ by profession. Researchers searched four databases through March 2025 and screened 561 records, keeping 18 trials of adults with a clinical TMD diagnosis. Trials compared manual therapy with sham treatment, no treatment, splints, medication, exercise or education. Pain was rated on the visual analogue or numeric rating scale (0 to 10), and maximum mouth opening was measured in millimetres. Risk of bias was checked with the Cochrane tool and certainty with GRADE. Because the trials differed so widely in technique, dose, comparator and follow-up, results were summarized in words rather than pooled statistically. Most trials reported short-term pain reduction and wider mouth opening, but certainty was low to moderate for pain and low for mouth opening. High-velocity low-amplitude (HVLA) thrusts made up 56% of interventions and fascial manipulation with myofascial release made up 37.5%. Dry needling plus upper neck HVLA beat splint therapy, diclofenac and joint mobilization at three months (p < 0.001), and intra-oral therapy kept benefits for one year in chronic jaw-muscle pain. Upper thoracic HVLA showed no significant effect (p > 0.05), and jog manipulation gained only 6.86 mm of mouth opening at first visit with no later group difference. Massage and fascial manipulation by physiotherapists were linked to relief of jaw-muscle symptoms, while chiropractic, osteopathic and dental trials also reported gains. Physiotherapy trials were the most numerous, which the authors attribute to publication volume rather than superior effectiveness. The authors describe manual therapy as associated with short-term benefit and treat professional comparisons as descriptive, since profession was tangled with setting, technique and country. Limitations include small samples, short follow-up, mixed diagnoses, English-only searching and no meta-analysis. Safety findings were not reported in pooled form, and the evidence mostly covers weeks to months rather than years. The authors call for larger trials with longer follow-up and standardized protocols, and they state that manual therapy is best delivered by trained, licensed professionals.

Salma Bouqartacha et al. (2026) · Chiropractic & manual therapies

This randomized mechanistic cross-over trial with 89 adults explored how two hands-on neck treatments differ right after they are delivered. Chronic neck pain, defined here as pain lasting at least 12 weeks, is one of the leading causes of disability worldwide. Spinal manipulation (SM) is a single quick, shallow thrust applied to a joint, and spinal mobilization (Smob) is a slower, repeated rocking pressure on the same area. Both are recommended in clinical guidelines, but they are often lumped together, so little was known about how their effects on pain, movement and muscle activity compare. Participants were aged 18 to 65, with an average of 35 years, and 65% were women. They were recruited in Zurich, Switzerland, and Trois-Rivieres, Canada. Each person attended two sessions three days apart, receiving SM in one and Smob in the other in random order. SM was one thrust to the most painful neck joint while lying face up, and Smob was 30 seconds of repeated pressure on the same level while lying face down. Pain was rated from 0 to 10, and neck movement, tenderness to pressure, grip strength and muscle electrical activity were measured before and after. Pain dropped by 0.79 points after SM and 0.37 points after Smob, a gap of 0.41 points (p = 0.002), which stayed below the 1.3 points considered clinically meaningful. Neck movement improved after both treatments, by about 4.6 degrees after SM and 3.7 degrees after Smob in bending forward and back, with no difference between them. Neck muscles responded more strongly during SM, with activity in the sternocleidomastoid about six times higher (0.144 versus 0.023). Tenderness and grip strength changed inconsistently, and the grip decrease of 1.13 kg was far under the 6 kg detectable change. Participants' own global impression of change favored SM (p < 0.001) but also stayed below the clinical threshold. Upper trapezius activity was likewise higher during SM (0.083 versus 0.024). No serious adverse events were reported. The authors state that statistically significant differences did not reach clinical significance, so the trial cannot support conclusions about which treatment works better in practice. Only immediate effects after one session were measured, many outcomes were tested, participants could tell the treatments apart, and baseline disability was mostly mild to moderate. Clinician training also differed between sites. The authors propose that future trials examine several sessions of each treatment, since a multi-session or combined approach may reach clinical relevance.

Imran Amjad et al. (2025) · PloS one

This pragmatic randomized controlled trial with 106 adults explored whether chiropractic spinal adjustments change measurable biological markers, not just how patients feel. Researchers tracked three systems: neuroplasticity (the nervous system's capacity to adapt, measured via brain-derived neurotrophic factor or BDNF — a protein that supports brain and nerve health), stress response (measured through cortisol, the body's primary stress hormone, sampled from blood, saliva, and hair), and inflammation (tracked via cytokines like IL-6 and TNF-α, signaling proteins immune cells use to coordinate the body's inflammatory response). The goal was to see whether chiropractic care's known benefits for pain and function might trace back to changes at this biological level. Pain-free adults aged 20-60 with a history of recurrent (subclinical) spinal discomfort were randomly assigned to 12 weeks of chiropractic spinal manipulation — delivered about three times weekly by a registered chiropractor — or a closely matched sham procedure with no actual spinal thrust. Eighty-eight of the 106 enrolled completed the 12-week assessment. Blood, saliva, and hair samples were analyzed via laboratory immunoassay at baseline, 12 weeks, and a 16-week follow-up. Blinding worked well: 94% of participants in both groups believed they had received real chiropractic care. After 12 weeks, the chiropractic group showed meaningfully higher blood BDNF (up 150 units, p=0.009 — a strong statistical signal this wasn't due to chance) and higher IL-6 (p<0.001) than the sham group, alongside lower TNF-α at both 12 and 16 weeks (p=0.023 and p=0.028). The researchers interpret the IL-6 rise not as harmful inflammation but as a "myokine" effect — the same kind of signal muscles release after exercise — since it appeared alongside lower TNF-α and IFN-γ, the markers more classically tied to harmful inflammation. By 16 weeks, blood cortisol and IFN-γ were lower in the chiropractic group than sham, though this reflected the sham group's levels rising over that period more than a further chiropractic effect. Markers like CRP and several immune cell counts (CD4, CD8, CD56) showed no clear group differences. Only five participants reported mild, short-lived muscle soreness; no other adverse events occurred. This is among the first studies to track chiropractic's biological effects over months rather than single sessions, offering a possible mechanism — neuroplasticity, stress-hormone, and inflammation changes — behind chiropractic's reported clinical benefits. But the effects were modest, confidence intervals were wide, and the single-site Pakistani sample of 88 completers, with over 30% dropout by 16 weeks, limits how far these findings generalize. Larger trials that connect these biomarker shifts to actual pain relief and function are the next step.

Pamela M Rist et al. (2020) · Cephalalgia : an international journal of headache

This pilot randomized controlled trial with 61 adult women explored whether adding multimodal chiropractic care to enhanced usual care could feasibly be delivered to people with episodic migraine, and whether it might reduce how often migraines occurred. Multimodal chiropractic care combines several hands-on techniques — spinal manipulation (adjusting joint movement in the spine), joint mobilization, soft-tissue release, and posture correction — rather than spinal manipulation alone, the approach most prior migraine trials tested. Enhanced usual care meant continuing regular medical treatment plus migraine education materials and regular phone check-ins, giving both groups comparable attention from the study team. Participants were women ages 21 to 55 (average 36) having 4 to 13 migraine days a month, randomly assigned to receive up to 10 individualized chiropractic sessions over 14 weeks (29 women) or enhanced usual care alone (32 women). Chiropractors tailored treatment to each person's diagnosis — myofascial pain, spinal misalignment, or jaw dysfunction — drawing from a fixed menu of techniques. Migraine frequency, severity, and disability were tracked through daily logs and standardized questionnaires: the Migraine Disability Assessment (MIDAS), the Headache Impact Test (HIT-6), and a migraine-specific quality-of-life scale, completed at 14 and 18 weeks. Recruitment and safety looked encouraging: of 422 people screened, 61 enrolled over 20 months, 93% completed migraine logs, and no serious side effects occurred, though only 83% of chiropractic-group participants attended enough sessions to meet the study's own adherence goal (versus a target of 85%), so feasibility criteria were narrowly missed. Migraine days dropped substantially more with chiropractic care added, a difference of about 2 fewer migraine days per month than usual care alone (95% confidence interval -3.46 to -0.37, meaning the true benefit is likely real but its exact size is uncertain), and this advantage held up a month after treatment ended. Disability and headache-impact scores (MIDAS and HIT-6) improved significantly more with chiropractic care too. However, migraine severity, duration, medication use, and quality-of-life scores did not differ significantly between groups, and musculoskeletal stiffness was reported more often by the chiropractic group (21% versus 6%). For migraine sufferers seeking non-drug options, these results are promising but preliminary: the size of the migraine-day reduction was similar to what topiramate, propranolol, and erenumab achieve against placebo in prior research. Because participants and chiropractors knew who was receiving treatment, and the chiropractic group received more attention overall, some of the benefit could reflect that extra contact rather than the techniques themselves. The sample was small, all female, and drawn from one clinic, so a larger, multi-site trial is needed before multimodal chiropractic care can be recommended as proven migraine therapy.

Gert Bronfort et al. (2022) · Chiropractic & manual therapies

Low back pain touches an estimated 40-80% of adults at some point, and when it becomes chronic, it is a major driver of disability, missed work, and long-term opioid use. Guidelines recommend combining conventional care with complementary approaches like spinal manipulation, exercise, and acupuncture, but most back pain treatment in practice still relies on a single approach. This year-long randomized trial in Minneapolis compared standard chiropractic care against a coordinated team approach -- chiropractors, acupuncturists, massage therapists, psychologists, exercise therapists, and a physician working together -- to see whether combining disciplines beats chiropractic care alone for people with ongoing low back pain. 201 adults with long-standing back pain (on average, pain for 8 to 9 years) were randomly assigned to 12 weeks of either chiropractic-only care or the multidisciplinary team approach, with a case manager coordinating each patient's individualized plan. Both groups showed strong participation -- over 90% attended their recommended visits. Researchers tracked back pain intensity as the main outcome, alongside disability, quality of life, and patient satisfaction, checking in at 4, 12, 26, and 52 weeks after the study began. Over the full year, the team-based approach edged out chiropractic-only care on pain intensity, with the clearest advantage showing up at the one-year mark. The team approach also showed a meaningful, statistically significant advantage for disability, overall improvement, satisfaction with care, and how often people experienced back symptoms -- though pain relief itself, while favoring the team approach throughout, only reached statistical significance at certain checkpoints (mainly week 52). Things like quality of life, medication use, and fear of movement did not differ meaningfully between the two approaches. Both approaches were very safe: only five serious health events occurred over the year (mostly unrelated conditions like pneumonia or a fractured foot), and about half of participants in both groups reported mild, temporary side effects like increased soreness -- at nearly identical rates whichever approach they received. In people with chronic low back pain, this trial found that a coordinated team of practitioners — rather than chiropractic care alone — gave a modest edge, mainly on disability and overall satisfaction, without added safety risk. That said, the study's participants were not very racially or economically diverse, and the exact process used to decide each patient's treatment plan had not itself been formally validated, so the results may not translate perfectly to every clinic. Still, the findings support integrated, team-based care as a reasonable option on the evidence here.

Filip Gedin et al. (2025) · BMC musculoskeletal disorders

This Swedish trial asked whether a chiropractor, a physiotherapist, or advice to stay active works best for low back pain lasting months — and the honest answer is that it could not tell the three apart. Eighty-eight people at ten primary care clinics around Stockholm were randomly assigned to one of four things: advice only, physiotherapy, chiropractic care, or both together. Six months later, everyone was better. Disability scores dropped in every group — most in the chiropractic group, least in the physiotherapy group — but the gaps between groups were well within what chance alone would produce. Pain scores and quality of life told the same story: improvement everywhere, no clear winner. Where the groups did differ was cost. The advice-only group ended up costing the health system about three times more than the others — around SEK 11,000 per person versus roughly SEK 3,000 — mostly because those patients went on to see doctors more, and one of them had spine surgery. Getting hands-on treatment early appeared to head off more expensive care later, though with numbers this small a single surgery moves the whole average. Combining chiropractic care with physiotherapy came out best on the economics: slightly more quality-adjusted life years for slightly less money. But "slightly" is doing a lot of work — the difference across all four groups was eight thousandths of a QALY, which is roughly three days of perfect health. The researchers are unusually candid about the limits. They wanted far more participants than they got, nearly half the people dropped out before six months, and the four groups were not well matched at the start. They present this as a lesson for whoever runs the definitive trial next, not as a result to act on. What it does support, gently: for chronic low back pain, staying active matters, and both chiropractic care and physiotherapy are reasonable, comparably effective options — with some signal that getting treatment rather than advice alone may save money downstream.