Effect of Stroboscopic Balance Training on Chronic Ankle Instability in Volleyball Players

NCT07255625 | Completed

• 1 other identifier: 5
• Study Type: interventional
• Target: 24
• Locations: 1 country
• Sites: 1

Brief Summary

Effect of Stroboscopic Balance Training on Chronic Ankle Instability in Volleyball Players

Conditions

Chronic Ankle Instability

Keywords

chronic ankle instability; stroboscopic glasses; balance training; volleyball athletes

Outcome Measures

Primary Outcomes (2)

• Dynamic Balance Assessments

  Y Balance Test

  From enrollment to the end of treatment at 8 weeks

• Dynamic Balance Assessments

  Performanze Balance System

  From enrollment to the end of treatment at 8 weeks

Secondary Outcomes (5)

• Vertical Jump Test

  From enrollment to the end of treatment at 8 weeks

• Single Leg Hop Test

  From enrollment to the end of treatment at 8 weeks

• Active Joint Position Sense

  From enrollment to the end of treatment at 8 weeks

• Functional Assessments - Foot and Ankle Ability Measure-Sports Subscale (FAAM-Sport)

  From enrollment to the end of treatment at 8 weeks

• Functional Assessments - Cumberland Ankle Instability Tool

  From enrollment to the end of treatment at 8 weeks

Study Arms (2)

Stroboscopic Glassess Group

EXPERIMENTAL

The athletes assigned to Group A underwent an eight-week balance training program using stroboscopic glasses, conducted twice a week under the supervision of a physiotherapist.

Device: Balance training with stroboscopic glasses

Control Group

ACTIVE COMPARATOR

The athletes assigned to Group B underwent an eight-week traditional balance training program, conducted twice a week under the supervision of a physiotherapist.

Other: Traditional Balance Training

Interventions

Traditional Balance Training OTHER

The intervention consisted of a supervised, multi-modal balance training program targeting differentaspects of static and dynamic balance for participants with chronic ankle instability. The program included six progressively challenging exercises, administered under the supervision of a physiotherapist. Each session lasted approximately 20 minutes, and participants completed two sessions per week for eight weeks. The training was conducted indoors, barefoot, in small groups, with exercises performed in two sets, including 30-second rests between exercises and 2-minute rests between sets. Progression was implemented according to participants' performance throughout the program.

Control Group

Balance training with stroboscopic glasses DEVICE

Participants in Group A completed a supervised, multi-modal balance training program while wearing Senaptec stroboscopic glasses (Beaverton, Oregon), set to a duty cycle of 100 ms transparent followed by 150 ms opaque. The glasses use liquid crystal lenses that alternate between clear and nearly opaque states when electrically activated and can operate in both binocular and monocular modes, with settings adjustable via a Bluetooth application. The program, targeting static and dynamic balance in individuals with chronic ankle instability, consisted of six progressively challenging exercises performed indoors, barefoot, in small groups, lasting approximately 20 minutes per session, twice weekly for eight weeks. Exercises were completed in two sets with 30-second rests between exercises and 2-minute rests between sets, and progression was adjusted based on participant performance.

Stroboscopic Glassess Group

Eligibility Criteria

• Age: 16 Years - 26 Years
• Sex: female
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• 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.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Biruni University: lead

Study Sites (1)

Biruni University

Fatih, İ̇stanbul, Turkey (Türkiye)

Location

Related Publications (19)

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  PMID: 18345343 RESULT

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  PMID: 30589387 RESULT

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  PMID: 24377963 RESULT

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  PMID: 35206263 RESULT

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  PMID: 34069907 RESULT

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  PMID: 28605310 RESULT

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  PMID: 18503872 RESULT

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  PMID: 29288435 RESULT

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  PMID: 27635773 RESULT

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  PMID: 34058832 RESULT

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  PMID: 19945591 RESULT

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Asistant professor

Study Record Dates

• First Submitted: November 20, 2025
• First Posted: December 1, 2025
• Study Start: December 20, 2025
• Primary Completion: February 20, 2026
• Study Completion: March 1, 2026
• Last Updated: March 3, 2026

Record last verified: 2026-03

Locations

TU (1)