Eye-Hand Cross-Dominance and Upper-Extremity Performance in Volleyball Players
Official title: Comparison of Upper Extremity Muscle Strength and Motor Performance Between Volleyball Players With and Without Crossed Eye-Hand Dominance
Run by Istinye University · NCT07784530 · Data updated 2026-11-12
This observational study tests whether volleyball players with crossed eye-hand dominance differ in upper-extremity strength and motor performance compared with players whose dominance is on the same side.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years to 30 Years |
| Sex | All |
| Enrollment | 30 (estimated) |
| Sponsor | Istinye University Academic / other |
| Locations | 1 site (Istanbul) |
| Status | Recruiting |
| Started | August 30, 2026 |
| Main results expected | November 15, 2026 |
| Study ends | November 30, 2026 |
| Registry record updated | October 1, 2026 |
| Trial ID | NCT07784530 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are healthy volleyball players aged 18–30 with at least three years of experience, training at least three days per week, and no recent upper-extremity injuries.
✕Probably not a fit
Participants with current musculoskeletal or neurological disorders, or recent shoulder, elbow, or hand surgery, may not experience any study-related benefits.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This cross-sectional, observational study compares upper-extremity muscle strength and motor performance between volleyball players with crossed eye-hand dominance and those without. Participants will be 18 to 30 years old, actively training, and free of recent upper-extremity injuries. Eye and hand dominance will be determined using standardized tests, after which strength measures and motor performance outcomes will be collected and compared between groups. The goal is to see if crossed dominance is linked to differences in visuomotor control and functional performance relevant to volleyball. The study is conducted at Istinye University in Istanbul, with no listed interventions beyond assessments.
Why it matters
Potential benefit: If crossed eye-hand dominance is linked to performance differences, findings could inform targeted training or screening for volleyball players.
How similar studies have gone: Prior research in related sports suggests eye-hand dominance can influence visuomotor performance, but evidence specific to volleyball players and crossed dominance is limited.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Aged between 18 and 30 years. * Male or female volleyball player. * At least three years of active volleyball participation. * Currently training at least three days per week. * No upper extremity injury within the previous six months. * Normal or corrected-to-normal visual acuity with eyeglasses or contact lenses. * Willing to participate and able to provide written informed consent. Exclusion Criteria: * History or presence of an acute or chronic musculoskeletal disorder that may affect study assessments. * Presence of a neurological or vestibular system disorder. * Presence of visual field loss, strabismus, or a severe refractive error that cannot be adequately corrected. * History of shoulder, elbow, or hand surgery within the previous six months. * Not currently participating regularly in volleyball or structured exercise.
Where it's running
-
Istinye University
Istanbul, Turkey (Türkiye) Recruiting
Study contacts
- Study coordinator: Kubra Kardes, Asst. Prof.
- Email: kubrakoce@gmail.com
- Phone: 05387115631
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.