Eye-Hand Cross-Dominance and Upper Extremity Performance in Volleyball Players
2026年8月21日 更新者：Kubra Kardes、Istinye University
Comparison of Upper Extremity Muscle Strength and Motor Performance Between Volleyball Players With and Without Crossed Eye-Hand Dominance
Eye and hand dominance may influence visuomotor coordination, motor control, and upper extremity performance in athletes. Crossed eye-hand dominance occurs when the dominant eye and dominant hand are located on opposite sides of the body. However, evidence regarding the relationship between crossed eye-hand dominance and upper extremity performance in volleyball players remains limited.
This observational cross-sectional study aims to compare upper extremity muscle strength and motor performance between volleyball players with and without crossed eye-hand dominance. Participants' eye and hand dominance will be determined using standardized assessments. Upper extremity muscle strength and motor performance outcomes will then be measured and compared between the two groups.
研究概览
地位
招聘中
条件
研究类型
观察性的
注册 (估计的)
30
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习联系方式
- 姓名：Kubra Kardes, Asst. Prof.
- 电话号码：05387115631
- 邮箱：kubrakoce@gmail.com
学习地点
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Istanbul、土耳其（türkiye）、34010
- 招聘中
- Istinye University
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接触：
- Kubra Kardes, Asst.Prof
- 电话号码：05387115631
- 邮箱：kubrakoce@gmail.com
-
-
参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
- 成人
接受健康志愿者
是的
取样方法
概率样本
研究人群
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.
描述
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.
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
队列和干预
团体/队列 |
干预/治疗 |
|---|---|
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Group 1: Volleyball Players With Crossed Eye-Hand Dominance
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Volleyball players whose dominant eye and dominant hand are on opposite sides of the body.
For example, right-eye dominance with left-hand dominance or left-eye dominance with right-hand dominance.
Participants will undergo upper extremity muscle strength and motor performance assessments.
No intervention will be administered.
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Group 2: Volleyball Players Without Crossed Eye-Hand Dominance
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Volleyball players whose dominant eye and dominant hand are on the same side of the body.
For example, right-eye dominance with right-hand dominance or left-eye dominance with left-hand dominance.
Participants will undergo the same upper extremity muscle strength and motor performance assessments.
No intervention will be administered.
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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Dominant Eye
大体时间：4 weeks
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Eye dominance will be determined using the Miles Test.
The participant will focus on a distant target with both eyes open and will then close each eye separately.
The eye with which the target remains centered will be classified as the dominant eye.
Eye dominance will be used with hand dominance to classify participants as having crossed or non-crossed eye-hand dominance.
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4 weeks
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Bilateral Shoulder Muscle Strength
大体时间：4 weeks
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Bilateral shoulder flexion, extension, and abduction muscle strength will be measured using a validated handheld myometer.
Measurements will be recorded separately for the right and left sides.
Higher force values indicate greater shoulder muscle strength, whereas lower values indicate lower muscle strength.
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4 weeks
|
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Bilateral Elbow Muscle Strength
大体时间：4 weeks
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Bilateral elbow flexion and extension muscle strength will be measured using a validated handheld myometer.
Measurements will be recorded separately for the right and left sides.
Higher force values indicate greater elbow muscle strength, whereas lower values indicate lower muscle strength.
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4 weeks
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Bilateral Handgrip Strength
大体时间：4 weeks
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Handgrip strength will be measured bilaterally using a digital hand dynamometer.
Three measurements will be performed for each hand, and the mean value will be recorded.
Higher values indicate greater handgrip strength, whereas lower values indicate lower handgrip strength.
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4 weeks
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Hand-Eye Coordination
大体时间：4 weeks
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Hand-eye coordination will be assessed using the Alternate-Hand Wall Toss Test.
The participant will throw a ball against a wall with one hand, catch it with the opposite hand, and repeat the sequence by alternating hands.
The total number of successful throws and catches completed within 30 seconds will be recorded.
A higher number indicates better hand-eye coordination and motor performance, whereas a lower number indicates poorer performance.
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4 weeks
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Medicine Ball Throw Distance
大体时间：4 weeks
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Upper extremity explosive power will be assessed using the Medicine Ball Throw Test.
The participant will sit with the back supported against a wall and the legs extended and will throw the medicine ball as far as possible.
The longest valid throwing distance will be recorded in meters.
A longer distance indicates greater upper extremity explosive power.
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4 weeks
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Closed Kinetic Chain Upper Extremity Stability Test Score
大体时间：4 weeks
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Upper extremity functional stability, strength, power, and endurance will be assessed using the Closed Kinetic Chain Upper Extremity Stability Test.
The participant will assume a push-up position with the hands placed on two markers positioned 90 centimeters apart.
The total number of valid alternating touches performed within the specified test period will be recorded.
A higher number of touches indicates better upper extremity functional performance and stability.
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4 weeks
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Scapular Muscular Endurance Time
大体时间：4 weeks
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Scapular stabilizer muscle endurance will be assessed using the Scapular Muscular Endurance Test.
An appropriately sized wooden rod will be positioned between the participant's elbows while the scapulae are maintained in a neutral position.
The duration for which the participant can maintain the standardized position will be recorded in seconds.
A longer duration indicates greater scapular muscular endurance.
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4 weeks
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Upper Quarter Y-Balance Test Reach Distance
大体时间：4 weeks
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Upper extremity and trunk balance, mobility, and stability will be assessed using the Upper Quarter Y-Balance Test.
Testing will begin with the non-dominant hand as the reaching hand.
Maximum reach distances in the medial, inferolateral, and superolateral directions will be recorded.
Greater reach distances and higher composite scores indicate better upper extremity dynamic balance and functional stability.
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4 weeks
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Light-Based Reaction Time
大体时间：4 weeks
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Reaction time and neuromuscular control will be assessed using the BlazePod light-based reaction system.
Participants will respond to randomly activated visual stimuli according to a standardized testing protocol.
Reaction time will be recorded in milliseconds.
A shorter reaction time indicates faster visual-motor responses, whereas a longer reaction time indicates slower responses.
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4 weeks
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始 (估计的)
2026年8月30日
初级完成 (估计的)
2026年11月15日
研究完成 (估计的)
2026年11月30日
研究注册日期
首次提交
2026年8月21日
首先提交符合 QC 标准的
2026年8月21日
首次发布 (实际的)
2026年8月25日
研究记录更新
最后更新发布 (实际的)
2026年8月25日
上次提交的符合 QC 标准的更新
2026年8月21日
最后验证
2026年8月1日
更多信息
与本研究相关的术语
其他研究编号
- 2026/01
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