Cognitive Functions in Women's National Sitting Volleyball Players
Effects of a Sleep Environment Optimization Intervention on Cognitive Functions in Women's National Sitting Volleyball Players
This study investigates the effects of a multidimensional, 13-component sleep hygiene optimization intervention on cognitive performance (executive functions, cognitive flexibility, and psychomotor speed) and objective sleep parameters in elite female sitting volleyball athletes. The study aims to optimize the on-court decision-making mechanisms of Paralympic athletes by improving sleep quality through structured environmental and behavioral factors.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Quick decision-making, attention, and executive control are of critical importance in elite sports performance, and these neurocognitive functions are highly dependent on high-quality sleep. While the literature generally focuses on athletes without physical disabilities, evidence regarding sleep optimization for Paralympic athletes-who often experience specific physiological challenges such as chronic pain or spasticity-is limited. This research was conducted during the competition preparation period with athletes from the Turkish Women's National Sitting Volleyball Team (n=8). The study utilized a single-group pre-test/post-test experimental design, applying a specific sleep hygiene intervention consisting of 13 components. The effectiveness of the intervention was systematically analyzed using objective cognitive tests evaluating processing speed, attention, and executive control (Symbol Digit Modalities Test and Stroop Test), alongside objective sleep parameters obtained via wearable technology (Xiaomi Mi Band 7).
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Bolu, Turkey (Türkiye), 14000
- Bolu Abant Izzet Baysal University Spor Science Faculty
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- ≥ 18 years of age
- Active national sitting volleyball team member
- ≥ 1 year of national team experience
- ≥ 20 hours of weekly training
Exclusion Criteria:
- Non-compliance with the team camp program
- Major neurological diagnosis
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
|---|---|
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Experimental: Sleep enviroment intervention /Experimental Group (Turkish Women's National Sitting Volleyball Team)
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This protocol includes the following 13 rules, with participants' compliance monitored daily via a checklist over 5 working days: (1) Ceasing the use of electronic devices 1 hour before sleep, (2) Avoiding vigorous exercise before sleep, (3) Optimizing room temperature between 18-22°C, (4) Turning off all light-emitting devices, (5) Using a sleep mask, (6) Not using the bedroom for work purposes during the day, (7) Avoiding unhealthy snacks before sleep, (8) Cutting off caffeine intake at least 3 hours before sleep, (9) Engaging in adequate daily exercise, (10) Practicing pre-sleep stress management techniques, (11) Ensuring a quiet sleep environment, (12) Establishing a personalized pre-sleep routine (e.g., brushing teeth), and (13) Not taking daytime naps. |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
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Objective Cognitive Performance Analysis using the Symbol Digit Modalities Test (SDMT) and Stroop Test (TBAG Form)
Time Frame: Baseline (Day 0), Mid-intervention (Day 3), and immediately after the 5-day intervention (Day 8)
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Visual scanning and psychomotor speed (total substitutions, correct substitutions, number of errors) were recorded using the SDMT. Executive functions, cognitive flexibility, and response inhibition (task completion times in seconds, number of spontaneous corrections, and number of errors) were recorded using the Stroop Test. A decrease in completion times and an increase in accuracy rates indicate improved cognitive performance. |
Baseline (Day 0), Mid-intervention (Day 3), and immediately after the 5-day intervention (Day 8)
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Collaborators and Investigators
Sponsor
Investigators
- Study Director: Ahmet Sansi, Bolu Abant Izzet Baysal University Sport Science Faculty
- Principal Investigator: Semih KARAMAN, PhD (c), Bolu Abant Izzet Baysal University Sport Science Faculty
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- AIBU-ANE-AS-02
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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