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Flat feet fix may shift kneecap alignment, small study hints

NCT ID NCT07678840

Knowledge-focused Sponsor: Regionshospital Nordjylland Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 01, 2026 · Last updated Jul 29, 2026 · Updated 3 times

Summary

This study tests whether correcting a flat foot position with shoe inserts (orthoses) changes how the kneecap sits during standing. Ten adults with flexible flatfoot will have weight-bearing CT scans with and without orthoses, with knees straight and slightly bent. The goal is to see if foot correction reduces kneecap tilt or shift, but the study does not test pain relief—only immediate mechanical effects.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Foot orthoses (shoe inserts)
What this could lead to
If foot correction changes kneecap alignment, it could point toward a mechanical explanation for knee pain in people with flat feet.
What could go wrong
This is a very small proof-of-concept study (10 people) looking only at immediate mechanical effects, not pain or long-term outcomes. Results may not apply to everyone.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 10 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 35 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion criteria * Age 18-35 years * Pronated foot posture, defined as a Foot Posture Index (FPI) score of ≥ +6, including a calcaneal frontal plane position sub-score of +2. 25,26 ○ A trained examiner will assess FPI; inclusion is based on the right foot. * Flexible flatfoot deformity, defined as restoration of the medial longitudinal arch during lift of the first toe. Exclusion criteria * Knee pain during standing or at 20° knee flexion * Clinical signs of tibiofemoral instability * Previous knee or foot surgery * History of patellar dislocation * Neuromuscular disease * Pregnancy * Inability to perform full weight bearing during scans

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Conditions

The condition(s) this trial relates to.

flatfoot

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Flatfoot Patellofemoral alignment Patellofemoral joint

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Sportsmedicinsk Center, Frederikshavn Sygehus

    Frederikshavn, 9900, Denmark

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