Muscle & mechanical loading
Custom Foot Orthotics
Graded on: chronic low back pain and disability, short term (self-report).
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How this letter has changedLatest: September 2026 · Added.
New device record. Randomized trials by independent groups, including two with placebo An inactive substitute made to look like the real treatment, so participants cannot tell which one they received. insoles, and a 2026 meta-analysis A study that pools the numbers from several trials into one combined estimate. of seven trials (Lin et al., Disabil Rehabil 2026; PMID PubMed ID: the permanent number the US National Library of Medicine gives a published paper. Each one links to that paper's record on PubMed. 40844962) found less low back pain and disability with custom-made foot orthotics. Every outcome is self-reported, which caps the letter at B, and the effect is short term: seen at 4 to 6 weeks and gone from the largest trial (Cambron et al., Arch Phys Med Rehabil 2017; PMID 28465224) by 12. The two placebo-insole trials are Castro-Méndez et al. (Prosthet Orthot Int 2013; PMID 23327838) and Castro-Méndez et al. (Int J Environ Res Public Health 2021; PMID 34201981). Custom orthotics are fitted from a practitioner-taken impression; off-the-shelf insoles are not what this letter covers.PMID 28465224 PMID 23327838 PMID 34201981 PMID 40844962
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Custom foot orthotics are shoe inserts made from a mold of a person's foot. In several trials of people with long-term low back pain, including two against fake insoles, the inserts eased pain and disability. A pooled review of seven trials agreed, but rated its certainty as low. All of these results came from people rating their own pain. The benefit showed up at four to six weeks and had faded by twelve weeks in the largest trial. Store-bought insoles did not reduce pain. No serious harms were reported in the trials.
A letter describes the human evidence, not the product, the manufacturer, or the intervention's worth.
See the full evidence record →Graded on Chronic low back pain and disability, short term (self-report).
Why this gradeThe reasoning, and what the grade does not cover.
Grade B, held down by the endpoint The outcome a trial measures to decide whether the treatment worked, such as heart attacks, blood pressure or a symptom score. rather than the design. Custom orthotics for chronic low back pain have been tested in several randomized trials by independent groups, including two with placebo insoles, and a 2026 meta-analysis of seven trials found less pain and disability than controls. Every one of those outcomes is self-reported, which caps the letter at B however many trials agree. Two limits travel with the letter: the effect is short term, seen at 4 to 6 weeks and gone from the largest trial by 12, and the meta-analysis rated its certainty low. This grade covers custom-made orthotics fitted from a practitioner-taken impression. Off-the-shelf insoles did not reduce pain in the meta-analysis and are not what this letter describes.
WHAT THIS GRADE DOES NOT COVERlong-term relief, since no trial showed a difference beyond 12 weeks; foot, knee or hip pain, which were not the outcomes graded here; and prevention of back pain in people who do not have it.
A grade describes the human evidence for a named use. It is not advice, and it is not a judgment on any individual prescription. How the letters are decided →
No serious adverse events were reported in the trials. People with diabetic neuropathy or poor foot circulation need footwear changes checked by their clinician, since pressure points can go unnoticed.
The evidence, in fullFour papers, each linked to its PubMed record.
Cambron et al. (Arch Phys Med Rehabil, 2017; PMID 28465224): 225 adults with low back pain for at least 3 months randomized to custom-made shoe orthotics, orthotics plus chiropractic care, or a waitlist. At 6 weeks the orthotic group improved more than waitlist on pain (numerical rating scale) and function (Oswestry Disability Index); differences at 12 weeks and later were not significant. The trial was funded by a grant from Foot Levelers. Castro-Méndez et al. (Prosthet Orthot Int, 2013; PMID 23327838): 51 adults with excessive foot pronation and chronic low back pain randomized, double-blind Neither the participants nor the people assessing them know who received the real treatment until the trial ends., to custom-made orthoses or placebo insoles; pain and disability fell at 4 weeks. Castro-Méndez et al. (Int J Environ Res Public Health, 2021; PMID 34201981): 101 adults with pronated feet and chronic low back pain randomized to custom orthoses or non-corrective insoles; pain and Oswestry scores fell at 4 weeks. Lin et al. (Disabil Rehabil, 2026; PMID 40844962): meta-analysis of 7 randomized trials (423 participants), foot orthoses reduced pain and disability versus controls, GRADE certainty low, preformed insoles not effective for pain. Grade B: replicated The same finding reproduced by a separate research group. A result seen once can be chance or bias; a replicated one is harder to explain away. by independent groups, but on short-term self-reported outcomes.
Pain on a 0 to 10 scale and the Oswestry Disability Index at baseline, 4 to 6 weeks and 12 weeks. The trials found their effect at 4 to 6 weeks, and the largest found it had faded by 12.
Evidence notes: randomized trial, meta-analysis
Endpoint graded: Chronic low back pain and disability, short term (self-report) (self_report)
Last reviewed: September 2026
Educational use only · Not medical advice · EBL grades published human evidence and does not recommend treatment. Stopping a prescription is a decision for your physician.
As studiedDose, form, population and duration for every use.
Off-the-shelf insoles are sold for back pain as though they were the same thing. The meta-analysis found preformed insoles did not reduce pain; this grade describes custom orthotics only.
A grade describes the intervention that was tested. Where the product on the shelf differs from it, this says so.
Primary evidenceFour papers, each linked to its PubMed record.
Cambron et al. (Arch Phys Med Rehabil, 2017; PMID 28465224): 225 adults with low back pain for at least 3 months randomized to custom-made shoe orthotics, orthotics plus chiropractic care, or a waitlist. At 6 weeks the orthotic group improved more than waitlist on pain (numerical rating scale) and function (Oswestry Disability Index); differences at 12 weeks and later were not significant. The trial was funded by a grant from Foot Levelers. Castro-Méndez et al. (Prosthet Orthot Int, 2013; PMID 23327838): 51 adults with excessive foot pronation and chronic low back pain randomized, double-blind, to custom-made orthoses or placebo insoles; pain and disability fell at 4 weeks. Castro-Méndez et al. (Int J Environ Res Public Health, 2021; PMID 34201981): 101 adults with pronated feet and chronic low back pain randomized to custom orthoses or non-corrective insoles; pain and Oswestry scores fell at 4 weeks. Lin et al. (Disabil Rehabil, 2026; PMID 40844962): meta-analysis of 7 randomized trials (423 participants), foot orthoses reduced pain and disability versus controls, GRADE certainty low, preformed insoles not effective for pain. Grade B: replicated by independent groups, but on short-term self-reported outcomes.
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Products carry no letter. The letter belongs to the therapy as the trials studied it, and no trial tested these products unless the entry says so. Listed alphabetically; payment does not affect order.
Custom-made orthotics produced from a practitioner-taken impression or scan. Foot Levelers funded the Cambron 2017 randomized trial (PMID 28465224), the largest trial in this modality, through a $406,000 grant to National University of Health Sciences, and describes it as a study of its own custom orthotics.
Practitioner-dispensed. A chiropractor or other practitioner takes the foot impression or scan with the foot and ankle held in a neutral position, then orders the orthotics; they are not sold directly to consumers.
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