Investigation of the Effects of Exercises Performed With Stroboscopic Glasses on Athletic Performance in Volleyball Players

NCT07323108 | Completed DMC

• 1 other identifier: KA24/389
• Study Type: interventional
• Target: 40
• Locations: 1 country
• Sites: 2

Brief 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 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.

Conditions

Stroboscopic Glasses

Keywords

volleyball; stroboscopic glasses; physical fitness; sports performance

Outcome Measures

Primary Outcomes (5)

• Reaction Time

  Human Bencmark Test

  10 weeks

• Agility

  T Agility Test

  10 weeks

• Anaerobic performance

  Vertical Jump Test

  10 weeks

• Balance

  Flamingo Balance Test

  10 weeks

• Coordination

  Hexagonal Coordination Test

  10 weeks

Study Arms (2)

stroboscopic glasses group

EXPERIMENTAL

20 volleyball players using stroboscopic glasses in training

Device: stroboscopic visual training

Control group

NO INTERVENTION

20 volleyball players only exercised

Interventions

stroboscopic visual training DEVICE

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.

stroboscopic glasses group

Eligibility Criteria

• Age: 18 Years - 35 Years
• Gender Eligibility Details: Male volleyball players
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• 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

You may not qualify if:

• Female individuals
• Sedentary individuals
• Having visual, cognitive, or vestibular disorders

Sponsors & Collaborators

• Baskent University: lead

Study Sites (2)

Baskent University

Ankara, 06790, Turkey (Türkiye)

Location

Baskent University

Ankara, Turkey (Türkiye)

Location

Related Publications (4)

• 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.

  PMID: 34458386 RESULT

• Hulsdunker 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.

  PMID: 33897344 RESULT

• Zwierko 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.

  PMID: 39578413 RESULT

• Costa 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.

  PMID: 38959207 RESULT

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: 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.

Study Record Dates

• First Submitted: November 19, 2025
• First Posted: January 7, 2026
• Study Start: October 1, 2024
• Primary Completion: February 1, 2025
• Study Completion: February 1, 2025
• Last Updated: January 7, 2026

Record last verified: 2025-12

Data Sharing

• IPD Sharing: Will not share

Locations

TU (2)