Movement & fitness
Insoles and orthotics: cushioning, support, custom manufacture and evidence
On this page
An insole sits inside a shoe. A foot orthosis may cushion a pressure area or change how forces pass through the foot. Orthotics is a broader clinical field that also includes braces for other body regions; every orthosis is not a shoe insert.[1]
Terms and practical distinctions
| Term | Meaning | Boundary |
|---|---|---|
| Functional insole | Designed to support the foot and reduce strain | Its intended function must match the clinical problem[2] |
| Accommodative insole | Cushioning or redistribution of pressure | Reduced sensation can require professional pressure management[2] |
| Prefabricated versus custom | A stock device versus one individually manufactured or adapted | The label does not establish better pain relief[1] |
The reason for an insert comes before its shape
Guy’s and St Thomas’ distinguishes functional devices from accommodative cushioning. Pressure redistribution may be relevant to a deformity, corn, callus or reduced sensation, while another device may aim to reduce strain on an injury. The podiatrist considers the most appropriate design. These different goals explain why arch height or softness alone cannot rank products. A device that feels comfortable in a shop has not thereby been shown to treat the particular source of pain, prevent ulcers or replace a prescribed support.[2]
Orthotic assessment can involve more than an imprint of the foot
Oxford University Hospitals lists foot orthoses alongside other braces and supports within its orthotics service, with both prefabricated and custom-made options. Clinical assessment, fitting and review are parts of conservative management. Custom manufacture can address a specific design or fit requirement, but the existence of a scan or cast is not evidence of superior health outcomes. The relevant comparison includes the actual device, its purpose, the footwear and the wider treatment plan, rather than the price or manufacturing technology alone.[1]
Evidence & uncertainty
Manufacturing method is not an outcome. A custom-shaped device and a prefabricated insert can be compared only for a defined condition, outcome and follow-up. Evidence about adult heel pain cannot determine whether a child with painless flexible flat feet needs treatment.[6]
Selected-source overview · Independent review pendingPublished questions
Does a custom-made insole automatically relieve heel pain better than a stock one?
Selected-source overview · Independent review pending. Read the evidence context.
No. The selected heel-pain review found no custom-versus-prefabricated difference at its follow-up points. Manufacture and clinical benefit are separate questions.[3]
Evidence behind this answer
- Foot orthoses for plantar heel pain: a systematic review and meta-analysis
original systematic review · 2018
Original review summary or abstract and selected methods/results inspected; no independent full-study appraisal · Nineteen trials; follow-up categories; standardized pain effect; clinical importance; custom comparison
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Does the word orthosis always mean a shoe insert?
Selected-source overview · Independent review pending. Read the evidence context.
No. Oxford’s service includes braces and supports for other body regions as well as foot orthoses. The device’s body location and purpose matter.[1]
Evidence behind this answer
- About us - Orthotics
official guidance · Date not stated
Original indexed official service passages inspected; no claim of full-page appraisal · Service scope; foot orthoses and other braces; prefabricated/custom conservative management
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Are functional and accommodative insoles intended to do exactly the same job?
Selected-source overview · Independent review pending. Read the evidence context.
No. Guy’s and St Thomas’ distinguishes support and strain reduction from cushioning or pressure accommodation, although a plan may combine goals.[2]
Evidence behind this answer
- Foot insoles - Overview
official guidance · Date not stated
Selected relevant original guidance passages inspected · Functional/accommodative definitions; pressure contexts; gradual use and persistent discomfort
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Do painless flexible flat feet in a healthy child establish a need for expensive custom orthoses?
Selected-source overview · Independent review pending. Read the evidence context.
No. The selected Cochrane review found no supporting evidence for that routine use. Painful or disease-associated presentations need separate consideration.[6]
Evidence behind this answer
- Foot orthoses for treating paediatric flat feet
original systematic review · 2022
Original review summary or abstract and selected methods/results inspected; no independent full-study appraisal · Sixteen trials; population distinctions; painless flexible feet; high-cost custom evidence absent
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Did custom insoles beat sham insoles in the STAP trial?
Selected-source overview · Independent review pending. Read the evidence context.
No. At twelve weeks, pain and function did not differ clearly between those groups in the studied primary-care setting.[5]
Evidence behind this answer
- Custom insoles versus sham and GP-led usual care in patients with plantar heel pain: results of the STAP-study
randomized trial · 2021
Original review summary or abstract and selected methods/results inspected; no independent full-study appraisal · 185 randomized; three groups; shared exercise booklet; twelve-week results
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Are two orthosis reviews necessarily two independent sets of positive evidence?
Selected-source overview · Independent review pending. Read the evidence context.
No. They can contain overlapping trials and use different comparisons or pooling choices. Their conclusions need to be read with those differences in view.[4]
Evidence behind this answer
- Efficacy of foot orthoses for the treatment of plantar heel pain: a systematic review and meta-analysis
original systematic review · 2018
Original indexed abstract and bibliographic results inspected; direct PubMed body empty and publisher retrieval blocked; no full independent appraisal · Original indexed abstract conclusion; sham and other conservative comparators
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
One heel-pain review found a modest medium-term pain effect
Whittaker and colleagues’ 2018 review included nineteen randomized trials and 1,660 adults with plantar heel pain. Orthoses reduced pain relative to sham at seven to twelve weeks, with a standardized effect of minus 0.27 and a 95% interval from minus 0.48 to minus 0.06. Function did not improve clearly, and the authors were uncertain whether the pain difference was clinically important. Custom and prefabricated devices did not differ at the reviewed time points. Shorter and longer follow-up evidence was less certain.[3]
Custom manufacture did not improve a primary-care heel-pain comparison
The STAP trial randomized 185 people with plantar heel pain to custom insoles, sham insoles or GP-led usual care. All groups received an information booklet with exercises. At twelve weeks, custom and sham groups did not differ in pain or function, while some outcomes favored usual care over custom insoles. This evaluates referral and treatment in that primary-care context. It does not mean that cushioning never has a role, or that a professionally prescribed device for a different disorder should be abandoned without reassessment.[5]
Another review reached a less favorable overall conclusion
Rasenberg and colleagues’ 2018 systematic review concluded that orthoses were not superior to sham or other conservative treatments for pain and function in plantar heel pain. The wording differs from the medium-term signal in Whittaker’s review. Study selection, pooling and follow-up categories can change a summary conclusion; the reviews also draw on overlapping trials. They are competing interpretations of a limited literature, not independent replications establishing that all inserts work or that none can help. Neither resolves every individual device or indication.[4][3]
Painless childhood flat feet are a separate population
The 2022 Cochrane review included sixteen trials with 1,058 children, ranging from healthy painless flexible flat feet to painful or disease-associated presentations. It found no supporting evidence for high-cost custom orthoses in healthy children without pain, and limited certainty for other comparisons. The category matters: an ordinary flexible foot shape is not equivalent to painful arthritis, a rigid deformity or a neurologic condition. Trials in healthy children cannot decide the management of every child with foot symptoms.[6]
Persistent discomfort calls for a fit review
Guy’s and St Thomas’ notes that an insert changes standing and walking and can initially feel unfamiliar. Its advice favors gradual introduction, but persistent discomfort is a reason to remove the device and contact the podiatrist for adjustment. Wearing through continuing pain is not evidence that a correction is working.[2]
References
- About us - Orthotics
Official guidance
Oxford University Hospitals · Content/publication date: not stated
Accessed: 2026-10-13 UTC · Original indexed official service passages inspected; no claim of full-page appraisal
Cited sections: Service scope; foot orthoses and other braces; prefabricated/custom conservative management - Foot insoles - Overview
Official guidance
Guy’s and St Thomas’ NHS Foundation Trust · Content/publication date: not stated
Accessed: 2026-10-13 UTC · Selected relevant original guidance passages inspected
Cited sections: Functional/accommodative definitions; pressure contexts; gradual use and persistent discomfort - Foot orthoses for plantar heel pain: a systematic review and meta-analysis
Original systematic review
Whittaker GA and colleagues · Content/publication date: 2018
Accessed: 2026-10-13 UTC · Original review summary or abstract and selected methods/results inspected; no independent full-study appraisal
Cited sections: Nineteen trials; follow-up categories; standardized pain effect; clinical importance; custom comparison - Efficacy of foot orthoses for the treatment of plantar heel pain: a systematic review and meta-analysis
Original systematic review
Rasenberg N and colleagues · Content/publication date: 2018
Accessed: 2026-10-13 UTC · Original indexed abstract and bibliographic results inspected; direct PubMed body empty and publisher retrieval blocked; no full independent appraisal
Cited sections: Original indexed abstract conclusion; sham and other conservative comparators - Custom insoles versus sham and GP-led usual care in patients with plantar heel pain: results of the STAP-study
Randomized trial
Rasenberg N and colleagues · Content/publication date: 2021
Accessed: 2026-10-13 UTC · Original review summary or abstract and selected methods/results inspected; no independent full-study appraisal
Cited sections: 185 randomized; three groups; shared exercise booklet; twelve-week results - Foot orthoses for treating paediatric flat feet
Original systematic review
Evans AM and colleagues / Cochrane · Content/publication date: 2022
Accessed: 2026-10-13 UTC · Original review summary or abstract and selected methods/results inspected; no independent full-study appraisal
Cited sections: Sixteen trials; population distinctions; painless flexible feet; high-cost custom evidence absent
Scope & review
- Population
- General readers; individual eligibility and study populations distinguished
- Exposure or intervention
- Insoles and orthotics: cushioning, support, custom manufacture and evidence
- Comparison
- Functional/accommodative purpose; custom versus prefabricated; orthoses versus sham or usual care for defined populations
- Outcomes
- Source-specific symptoms, healing, infection, function and harms
- Timeframe
- Source-specific immediate care and historical study follow-up
- Jurisdiction
- Selected current UK NHS guidance, US professional/agency explanations and original international research; recommendations and product labels retain their source jurisdiction.
Selected-source educational explanation. Official guidance, original study findings and editorial interpretation are distinguished. No exhaustive search, independent systematic synthesis or qualified medical review has been completed.
Sources checked on their individual access dates. Selected sources were checked; ongoing surveillance and qualified review have separate statuses on the coverage page.
Revision history
- 2026-10-14 UTC: Added a sourced explanation in a bounded ten-article batch; qualified review remains pending.
What this article still leaves open
- What condition, pressure problem and footwear does the proposed device address?
- Long-term device-specific comparisons, disease-associated childhood indications and qualified review remain incomplete.
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