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Can a mixed dominant eye and hand boost or hinder volleyball performance?

NCT ID NCT07784530

Knowledge-focused Sponsor: Istinye University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 25, 2026 · Last updated Aug 26, 2026 · Updated 1 time

Summary

This study looks at volleyball players to see if having a dominant eye and dominant hand on opposite sides of the body (crossed eye-hand dominance) is linked to differences in upper body strength and motor performance. Researchers will compare players with and without this trait, measuring shoulder, elbow, and grip strength, as well as hand-eye coordination and explosive power. The goal is to better understand how eye-hand dominance might influence athletic ability in volleyball.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
Could reveal whether crossed eye-hand dominance affects athletic performance, potentially informing training or player selection.
What could go wrong
This is a small observational study, so it cannot prove cause and effect. Results may not apply to all athletes or sports.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

Nov 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Male and female volleyball players aged 18 to 30 years who have regularly participated in volleyball for at least three years and currently train at least three days per week will be recruited.

Ages

18 to 30 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Volleyball player

How to take part

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  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

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Contacts and locations

Locations

  • Istinye University

    RECRUITING

    Istanbul, 34010, Turkey (Türkiye)

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