Stroboscopic GlassesNCT07323108
Investigation of the Effects of Exercises Performed With Stroboscopic Glasses on Athletic Performance in Volleyball Players
A study testing stroboscopic visual training in people with Stroboscopic Glasses, run by Baskent University at 2 sites in Turkey (Türkiye).
Trial summary
The aim of this study was to examine the effects of exercises performed with stroboscopic glasses on athletic performance in volleyball players. 40 professional male volleyball players aged between 18-35, who had not undergone any surgery in the last 6 months and who had no chronic systemic disease were included in… Read more about this study
- Who is it for?
- Ages 18 to 35 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Stroboscopic Glasses
- What is being tested?
- stroboscopic visual training
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 40 participants
- Where
- 2 sitesTurkey (Türkiye)
- Study dates
- 1 Oct 2024to 1 Feb 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Being a professional volleyball player
- Not having undergone surgery in the last 6 months
- Not having any chronic, systemic, or neuromuscular disease
- Not having visual, cognitive, or vestibular disorders
- Exclusion Criteria: • Individuals under 18 and over 35 years of age
- Female individuals
- Sedentary individuals
- Having visual, cognitive, or vestibular disorders
Who cannot join
None listed.
Trial locations and contacts
2 sites in 1 country.
Turkey (Türkiye)2 sites
Baskent University
Ankara, 06790
Baskent University
Ankara
About this study
The aim of this study was to examine the effects of exercises performed with stroboscopic glasses on athletic performance in volleyball players. 40 professional male volleyball players aged between 18-35, who had not undergone any surgery in the last 6 months and who had no chronic systemic disease were included in the study. 20 individuals were randomly assigned to the stroboscopic glasses group and 20 individuals to the control group. Individuals in the stroboscopic glasses group were informed about stroboscopic glasses. Individuals in the stroboscopic glasses group wore glasses and individuals in the control group did their exercises without glasses for 6 weeks. Individuals' visual reaction time, auditory reaction time and target-oriented reaction time were measured with the Human Benchmark test, agility assessment with the T Agility test, anaerobic capacity assessment with the vertical jump test, balance assessment with the Flamingo Balance test and coordination assessment with the Hexagonal Coordination test. The evaluations were made three times, before exercise, 6 weeks after exercise and 10 weeks after exercise.
Read the detailed description
Individuals' visual reaction time, auditory reaction time and target-oriented reaction time were measured with the Human Benchmark test, agility assessment with the T Agility test, anaerobic capacity assessment with the vertical jump test, balance assessment with the Flamingo Balance test and coordination assessment with the Hexagonal Coordination test. The evaluations were made three times, before exercise, 6 weeks after exercise and 10 weeks after exercise.
- Conditions
- Stroboscopic Glasses
- Being tested
- stroboscopic visual training
- Keywords
- volleyball, stroboscopic glasses, physical fitness, sports performance
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
stroboscopic visual trainingDevice
40 volleyball players were evaluated at three times: pre-exercise, after 6 weeks and after 10 weeks regard to reaction time, agility, anaerobic performance, balance and coordination. Experimental group used stroboscopic glasses when doing exercise. Exercise program consisted lunge, jumping and balance exercises. Each exercise consisted 12 repetitions and 3 sets. Stroboscopic glasses were adjusted to 100 ms on/150 ms off flash level 3. This frequency is always preferred scientific research about stroboscopic visual training.
| Study group | Role | What they receive |
|---|---|---|
| stroboscopic glasses group | Experimental | 20 volleyball players using stroboscopic glasses in training Receives: Device: stroboscopic visual training |
| Control group | No intervention | 20 volleyball players only exercised |
What is being measured
The primary outcome is the main question the study is designed to answer.
Reaction Time
Human Bencmark Test
Measured: 10 weeks
Agility
T Agility Test
Measured: 10 weeks
Anaerobic performance
Vertical Jump Test
Measured: 10 weeks
Balance
Flamingo Balance Test
Measured: 10 weeks
Coordination
Hexagonal Coordination Test
Measured: 10 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 Jan 2026
- Study start1 Oct 2024
- Primary completion1 Feb 2025
- Study completion1 Feb 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (4)Papers the sponsor has linked to this study.
- Other trials for Stroboscopic GlassesStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- In this study, individuals were evaluated face-to-face at the Beştepe Volleyball Hall of the Turkish Volleyball Federation. Each evaluation lasted 30 minutes. After recording the sociodemographic information of the individuals, they were divided into two groups using a computer numbering system: the stroboscopic glasses group and the control group. The stroboscopic glasses group performed exercises with the glasses. The control group performed exercises without the stroboscopic glasses. The evaluations were conducted three times a week for six weeks, following the players' warm-up exercises. Since only one stroboscopic glasses was used, the evaluations were planned over two days, each lasting 30 minutes. On the first day, reaction time, agility, and anaerobic power were evaluated, respectively; on the second day, coordination and balance were evaluated respectively.
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 40 participants (actual)
Sponsor and investigators
- Lead sponsor
- Baskent University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07323108
- Sponsor's protocol ID
- KA24/389
- Status last verified
- Dec 2025
- First submitted
- 19 Nov 2025
- Last updated
- 7 Jan 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Due to privacy policy, volleyball team manager did not want to be shared individual performance data.
Publications
Avedesian JM, Covassin T, Baez S, Nash J, Nagelhout E, Dufek JS. Relationship Between Cognitive Performance and Lower Extremity Biomechanics: Implications for Sports-Related Concussion. Orthop J Sports Med. 2021 Aug 24;9(8):23259671211032246. doi: 10.1177/23259671211032246. eCollection 2021 Aug.
PubMed 34458386Hulsdunker T, Mierau A. Visual Perception and Visuomotor Reaction Speed Are Independent of the Individual Alpha Frequency. Front Neurosci. 2021 Apr 8;15:620266. doi: 10.3389/fnins.2021.620266. eCollection 2021.
PubMed 33897344Zwierko T, Tapia V, Vera J, Redondo B, Morenas-Aguilar MD, Garcia-Ramos A. Enhancing reactive agility in soccer: The impact of stroboscopic eyewear during warm-up across fatigued and non-fatigued conditions. Eur J Sport Sci. 2024 Dec;24(12):1798-1808. doi: 10.1002/ejsc.12224. Epub 2024 Nov 22.
PubMed 39578413Costa E, Gongora M, Bittencourt J, Marinho V, Cagy M, Teixeira S, Nicoliche E, Fernandes I, Machado C, Wienecke J, Ribeiro P, Gupta DS, Velasques B, Budde H. Decrease in reaction time for volleyball athletes during saccadic eye movement task: A preliminary study with evoked potentials. PLoS One. 2024 Jul 3;19(7):e0290142. doi: 10.1371/journal.pone.0290142. eCollection 2024.
PubMed 38959207
Study at a glance
From the registry record, last updated by the sponsor on 7 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Investigation of the Effects of Exercises Performed With Stroboscopic Glasses on Athletic Performance in Volleyball Players
- ClinicalTrials.gov ID
- NCT07323108
- Acronym / sponsor ID
- KA24/389
- Conditions
- Stroboscopic Glasses
- Keywords
- volleyball, stroboscopic glasses, physical fitness, sports performance
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 40 participants (actual)
- Lead sponsor
- Baskent UniversityUniversity, hospital or other
- Study start
- 1 Oct 2024 (actual)
- Primary completion
- 1 Feb 2025 (actual)
- Study completion
- 1 Feb 2025 (actual)
- First posted
- 7 Jan 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of this study was to examine the effects of exercises performed with stroboscopic glasses on athletic performance in volleyball players. 40 professional male volleyball players aged between 18-35, who had not undergone any surgery in the last 6 months and who had no chronic systemic disease were included in the study. 20 individuals were randomly assigned to the stroboscopic glasses group and 20 individuals to the control group. Individuals in the stroboscopic glasses group were informed about stroboscopic glasses. Individuals in the stroboscopic glasses group wore glasses and individuals in the control group did their exercises without glasses for 6 weeks. Individuals' visual reaction time, auditory reaction time and target-oriented reaction time were measured with the Human Benchmark test, agility assessment with the T Agility test, anaerobic capacity assessment with the vertical jump test, balance assessment with the Flamingo Balance test and coordination assessment with the Hexagonal Coordination test. The evaluations were made three times, before exercise, 6 weeks after exercise and 10 weeks after exercise.
Detailed description
Individuals' visual reaction time, auditory reaction time and target-oriented reaction time were measured with the Human Benchmark test, agility assessment with the T Agility test, anaerobic capacity assessment with the vertical jump test, balance assessment with the Flamingo Balance test and coordination assessment with the Hexagonal Coordination test. The evaluations were made three times, before exercise, 6 weeks after exercise and 10 weeks after exercise.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
- Model description
- In this study, individuals were evaluated face-to-face at the Beştepe Volleyball Hall of the Turkish Volleyball Federation. Each evaluation lasted 30 minutes. After recording the sociodemographic information of the individuals, they were divided into two groups using a computer numbering system: the stroboscopic glasses group and the control group. The stroboscopic glasses group performed exercises with the glasses. The control group performed exercises without the stroboscopic glasses. The evaluations were conducted three times a week for six weeks, following the players' warm-up exercises. Since only one stroboscopic glasses was used, the evaluations were planned over two days, each lasting 30 minutes. On the first day, reaction time, agility, and anaerobic power were evaluated, respectively; on the second day, coordination and balance were evaluated respectively.
| Arm | Type | Receives |
|---|---|---|
| stroboscopic glasses group | Experimental | Device: stroboscopic visual training20 volleyball players using stroboscopic glasses in training |
| Control group | No intervention | –20 volleyball players only exercised |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (8 listed)
- Being a professional volleyball player
- Not having undergone surgery in the last 6 months
- Not having any chronic, systemic, or neuromuscular disease
- Not having visual, cognitive, or vestibular disorders
- Exclusion Criteria: • Individuals under 18 and over 35 years of age
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| stroboscopic visual training40 volleyball players were evaluated at three times: pre-exercise, after 6 weeks and after 10 weeks regard to reaction time, agility, anaerobic performance, balance and coordination. Experimental group used stroboscopic glasses when doing exercise. Exercise program consisted lunge, jumping and balance exercises. Each exercise consisted 12 repetitions and 3 sets. Stroboscopic glasses were adjusted to 100 ms on/150 ms off flash level 3. This frequency is always preferred scientific research about stroboscopic visual training. | Device | stroboscopic glasses group |
Primary outcome
Reaction Time
Time frame: 10 weeks
Human Bencmark Test
Agility
Time frame: 10 weeks
T Agility Test
Anaerobic performance
Time frame: 10 weeks
Vertical Jump Test
Balance
Time frame: 10 weeks
Flamingo Balance Test
Coordination
Time frame: 10 weeks
Hexagonal Coordination Test
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Jan 2026.
- Results publication: PubMed 34458386Avedesian JM, Covassin T, Baez S, Nash J, Nagelhout E, Dufek JS. Relationship Between Cognitive Performance and Lower Extremity Biomechanics: Implications for Sports-Related Concussion. Orthop J Sports Med. 2021 Aug 24;9(8):23259671211032246. doi: 10.1177/23259671211032246. eCollection 2021 Aug.
- Results publication: PubMed 33897344Hulsdunker T, Mierau A. Visual Perception and Visuomotor Reaction Speed Are Independent of the Individual Alpha Frequency. Front Neurosci. 2021 Apr 8;15:620266. doi: 10.3389/fnins.2021.620266. eCollection 2021.
- Results publication: PubMed 39578413Zwierko T, Tapia V, Vera J, Redondo B, Morenas-Aguilar MD, Garcia-Ramos A. Enhancing reactive agility in soccer: The impact of stroboscopic eyewear during warm-up across fatigued and non-fatigued conditions. Eur J Sport Sci. 2024 Dec;24(12):1798-1808. doi: 10.1002/ejsc.12224. Epub 2024 Nov 22.
- Results publication: PubMed 38959207Costa E, Gongora M, Bittencourt J, Marinho V, Cagy M, Teixeira S, Nicoliche E, Fernandes I, Machado C, Wienecke J, Ribeiro P, Gupta DS, Velasques B, Budde H. Decrease in reaction time for volleyball athletes during saccadic eye movement task: A preliminary study with evoked potentials. PLoS One. 2024 Jul 3;19(7):e0290142. doi: 10.1371/journal.pone.0290142. eCollection 2024.
- Individual participant dataSharing planned: No. Due to privacy policy, volleyball team manager did not want to be shared individual performance data.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing stroboscopic visual training in people with Stroboscopic Glasses, run by Baskent University at 2 sites in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 0 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Reaction Time (time frame: 10 weeks). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07323108, which also lists 4 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Jan 2026.