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Flickering glasses may help volleyball players with wobbly ankles

NCT ID NCT07255625

Symptom relief Sponsor: Biruni University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether wearing stroboscopic glasses (which flicker between clear and dark) during balance exercises can help female volleyball players with chronic ankle instability. Twenty-four professional players completed a supervised balance training program while wearing the glasses. The researchers measured improvements in balance, jumping, and ankle function. The goal is to find a simple, non-drug way to strengthen ankle stability and prevent future sprains.

What this could mean

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

Active substance
Balance training program with stroboscopic glasses
What this could lead to
If effective, this training approach could help athletes with chronic ankle instability improve their balance and reduce the risk of future sprains.
What could go wrong
This is a small, completed study with only 24 participants, so results may not apply to all athletes. The training requires special glasses and may not be widely available.

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

24 people

The number who actually took part.

Started

Dec 2025

Finished

Mar 2026

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

16 to 26 years

Sex

Female participants only

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: * Were professional female volleyball players. * Had a history of at least two episodes of pain and swelling in the same ankle. * Experienced at least one ankle sprain within the last six months. * Exhibited persistent symptoms during functional activities and were free from symptoms related to any previous lower-extremity injuries. * Reported a feeling of instability in the ankle joint. * Had no other lower-extremity musculoskeletal injuries in the past six months. Exclusion Criteria: * Reported any vestibular or balance-related dysfunction. * Had any systemic disease. * Experienced an acute ankle sprain within the past six weeks. * Had a history of fractures in the lower extremities.

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As listed by the trial registrant

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

Chronic ankle instability

Contacts and locations

Locations

  • Biruni University

    Fatih, İ̇stanbul, Turkey (Türkiye)

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