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Completed

NCT Number: NCT04852549

Effects of Oculomotor Exercises on Volleyball Players

The researcher aimed to investigate the effects of oculo-motor exercises on dynamic visual acuity, balance and performance of volleyball players whose performance can be improved with visual skills training.

H0: Oculo-motor exercises applied to volleyball players are effective on dynamic visual acuity, balance and performance.

H1: Oculo-motor exercises have no effect on dynamic visual acuity, balance and performance in volleyball players.

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Key information

Conditions

Athlete

Age range

16 year–26 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Elif Aleyna Yazgan

Istanbul, 3434, Turkey (Türkiye)

About this study

This study on the Effect of Oculo-Motor Exercises on Dynamic Visual Acuity, Balance and Performance in Volleyball Players was ethically approved by the "Istanbul Medipol University Non-Invasive Ethics Committee" with file number 10840098-604.01.01-E.14171 on 16.04.2020. The study included 52 female volleyball players aged 16-26 who played participants for at least 3 years without interruption. Power analysis was performed using the 3.1.9.5 version of the G-Power program to determine the number of individuals to be included in the study. Type-1 was accepted as 0.05 and power ratio as 80%. Effect size 0.8 was taken. According to the results of the power analysis, the number of participants required to be included in the study was determined as 52.

Participants; Age, height, weight, gender, body mass index, dominant side, position played in volleyball, number of weekly training, daily training time, previous sports injuries, education status, smoking and alcohol use, accompanying illnesses were questioned. FBT and YBT were used for balance evaluations, and Nelson's Hand Reaction Test was used for reaction times. In addition, Dynamic Visual Acuity and Vertical Jumping distances were evaluated twice before and after treatment.

Participants included in the study, the control group continued their routine ball training after the evaluations, while the intervention group continued with the oculo-motor training for 4 weeks, 6 days a week, in the morning and evening, for 10 minutes, 2 times a day, in addition to normal ball training. they did the exercises. While doing the exercises, individuals were taught to focus on the purpose they held in their hands, move their head, and aim fast enough to see the image clearly. Two repetitions each week were added to the exercise numbers. Ten seconds rest between two sets and five seconds rest between movements.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being in the age range of 16-26
  • Playing licensed volleyball for at least 3 years without interruption
  • Have normal vision and hearing

Exclusion criteria

  • Having a direct blow to the lower or upper extremity in the past month
  • People with musculoskeletal disorders may experience balance (forward head posture).
  • Refractive defects
  • History of ankle fracture
  • Double-sided ankle sprain
  • Vision problems
  • History of lower extremity surgery in the last 6 months

Treatment and study plan

Oculomotor exercise

Other
  • While holding the head in the middle position, holding two colored objects in both hands, looking at the object in the right hand without turning the head, counting up to 10 and looking at the object in the left hand and counting up to 10,
  • While holding a fixed head in the middle position and holding a colored object in the right hand, following the object with the eyes while moving the right hand from right to left without turning the head and returning,
  • With the head fixed in the middle position, with the right hand on the left, eyes are fixed on the hand-held colored object and turn the head to the right and left.
  • The head will be fixed in the middle position, the eyes will be fixed on the colored object held in the right or left hand and the arm and the head will be turned to opposite directions.

Primary outcomes

  1. Balance

    Time frame: The evaluation will be made after 4 weeks of training.

    Static balance of the individuals was evaluated by Flamingo Balance Test (FDT). A wooden stick of 50 cm length, 5 cm height and 3 cm width was used in the test. Dynamic balance changes of individuals were evaluated with YDT. In the measurement of dynamic balance with Y Balance Test (YDT), the amount of reaching out on the dominant sides of all individuals was measured.

  2. Reaction time

    Time frame: The evaluation will be made after 4 weeks of training.

    Reaction time Nelson hand reaction test was used.

  3. Dynamic visual acuity

    Time frame: The evaluation will be made after 4 weeks of training.

    In fact, dynamic vision is defined as the ability to detect details when there is a relative movement between the observer and the target object. It was measured by reading the numbers during neck rotation. A PowerPoint containing 10 slides, each of which randomly had 5 numbers, was used to measure dynamic vision (the size of all numbers was 12 to 20 at the center of the page). Each page had 5 numbers with the same font and each person evaluated 10 pages

  4. Vertical jump

    Time frame: The evaluation will be made after 4 weeks of training.

    Vertical jump test was used.

Sponsors and collaborators

Lead sponsor

Istanbul Medipol University Hospital

Other

Registry information

Official study title

Effects of Oculomotor Exercises on Balance, Dynamic Visual Acuity and Performance in Volleyball Players

Important dates

Study start
2020
Primary completion
2021
Study completion
2021
First posted
Apr 21, 2021
Registry last updated
Apr 21, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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