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Fractal cues may restore natural gait in ACL rehab

NCT ID NCT07243535

Knowledge-focused Sponsor: Egas Moniz - Cooperativa de Ensino Superior, CRL Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 25, 2026 · Last updated Sep 11, 2026 · Updated 2 times

Summary

This study compares two types of visual cues during treadmill walking in 36 athletes who had ACL reconstruction. One cue is a steady beat (isochronous), the other has natural fluctuations (fractal). The goal is to see which better restores natural walking patterns and brain activity linked to movement control. If fractal cues work, they could improve rehab and reduce re-injury risk.

What this could mean

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

Active substance
Fractal-based visual cueing device
What this could lead to
If it works, this could point toward a new rehabilitation technique that helps athletes regain natural walking patterns and lower the chance of re-injury after ACL surgery.
What could go wrong
This is a very early, small study (36 participants) looking at short-term effects only. The approach may not translate to real-world benefits or reduce injury rates in practice.

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 36 people

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

Started

Oct 2025

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Ages

15 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: * Undergone unilateral ACL reconstruction less than 2 years ago; * Have medical release for the full load on the injury limb for at least 2 weeks; * Be independently pain-free walking; * Being sports athletes according to an athlete description: Training regularly to improve performance, actively participating in competitions or formally registering in a sports federation or association; * Must be able to understand and perform the requested task. Exclusion Criteria: * Participants with previous surgery on either knee; * Those with more than 3 months between ACL injury and surgery; * More than 2 weeks between surgery and the start of physical therapy; * Had another musculoskeletal injury in the lower limb within the past 6 months; * Another musculoskeletal surgery within the past 18 months; * Participants with a history of movement system pathologies, such as nervous system, cardiovascular, pulmonary, integumentary, or endocrine conditions; * Participants with vestibular or somatosensory system pathologies or visual impairments limiting their ability to see the metronome required for the task; * Use of medications that could affect locomotion and balance.

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Conditions

The condition(s) this trial relates to.

tinea pedis

As listed by the trial registrant

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

Anterior cruciate ligament reconstruction Anterior cruciate ligament reconstruction rehabilitation Athlete

How to take part

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  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

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Contacts and locations

Locations

  • Egas Moniz School of Health & Science

    RECRUITING

    Almada, Monte de Caparica, 2829-511, Portugal

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