Cognitive FunctionsNCT07857720
Cognitive Functions in Women's National Sitting Volleyball Players
A study testing Multidimensional Sleep Hygiene Optimization Protocol in people with Cognitive Functions, run by Abant Izzet Baysal University at 1 site in Turkey (Türkiye).
Trial summary
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. Read more about this study
- Who is it for?
- Ages 18 years and older, women onlyHealthy volunteers can take part
- Conditions the study is for
- Cognitive Functions
- What is being tested?
- Multidimensional Sleep Hygiene Optimization Protocol
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 8 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 10 Apr 2026to 25 Apr 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- Women only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- ≥ 18 years of age
- Active national sitting volleyball team member
- ≥ 1 year of national team experience
- ≥ 20 hours of weekly training
Who cannot join
- Non-compliance with the team camp program
- Major neurological diagnosis
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Bolu Abant Izzet Baysal University Spor Science Faculty
Bolu, 14000
About this study
Official title: 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.
Read the 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).
- Conditions
- Cognitive Functions
- Being tested
- Multidimensional Sleep Hygiene Optimization Protocol
- Keywords
- Cognitive Function, Para-Athete
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Multidimensional Sleep Hygiene Optimization ProtocolBehavioural
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.
| Study group | Role | What they receive |
|---|---|---|
| Sleep enviroment intervention /Experimental Group (Turkish Women's National Sitting Volleyball Team) | Experimental | * Intervention Type: Behavioral (Behavioral and Environmental Modification)
* Intervention Name: 13-Component Multidimensional Sleep Hygiene Optimization Protocol 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. Receives: Behavioral: Multidimensional Sleep Hygiene Optimization Protocol |
What is being measured
The primary outcome is the main question the study is designed to answer.
Objective Cognitive Performance Analysis using the Symbol Digit Modalities Test (SDMT) and Stroop Test (TBAG Form)
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.
Measured: Baseline (Day 0), Mid-intervention (Day 3), and immediately after the 5-day intervention (Day 8)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Oct 2026
- Study start10 Apr 2026
- Primary completion10 Apr 2026
- Study completion25 Apr 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cognitive FunctionsStudies of the same condition, open and under way.
- More trials run by Abant Izzet Baysal UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- The study sample will consist of all athletes who will be part of the Turkish women's sitting volleyball national team members for the 2026 season. The selection of participants will be conducted using a sampling method, and data will be collected from all volunteers who are willing to participate and meet the specified criteria. This approach will ensure the creation of a sample group that reflects all the characteristics of the target population. Once the volunteer participants have been identified, the researchers aim to optimize the sleep environment in collaboration with the coaches of them.
- Masking
- None (open label)
- Enrolment
- 8 participants (actual)
Sponsor and investigators
- Lead sponsor
- Abant Izzet Baysal University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Ahmet Sansi, Abant Izzet Baysal University
- Investigators
- Ahmet Sansi, Study director, Bolu Abant Izzet Baysal University Sport Science FacultySemih KARAMAN, PhD (c), Principal investigator, Bolu Abant Izzet Baysal University Sport Science Faculty
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07857720
- Sponsor's protocol ID
- AIBU-ANE-AS-02
- Status last verified
- Sep 2026
- First submitted
- 22 Sep 2026
- Last updated
- 5 Oct 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 5 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of a Sleep Environment Optimization Intervention on Cognitive Functions in Women's National Sitting Volleyball Players
- ClinicalTrials.gov ID
- NCT07857720
- Acronym / sponsor ID
- AIBU-ANE-AS-02
- Conditions
- Cognitive Functions
- Keywords
- Cognitive Function, Para-Athete
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 8 participants (actual)
- Lead sponsor
- Abant Izzet Baysal UniversityUniversity, hospital or other
- Study start
- 10 Apr 2026 (actual)
- Primary completion
- 10 Apr 2026 (actual)
- Study completion
- 25 Apr 2026 (actual)
- First posted
- 5 Oct 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
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 design
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- The study sample will consist of all athletes who will be part of the Turkish women's sitting volleyball national team members for the 2026 season. The selection of participants will be conducted using a sampling method, and data will be collected from all volunteers who are willing to participate and meet the specified criteria. This approach will ensure the creation of a sample group that reflects all the characteristics of the target population. Once the volunteer participants have been identified, the researchers aim to optimize the sleep environment in collaboration with the coaches of them.
| Arm | Type | Receives |
|---|---|---|
| Sleep enviroment intervention /Experimental Group (Turkish Women's National Sitting Volleyball Team) | Experimental | Behavioral: Multidimensional Sleep Hygiene Optimization Protocol* Intervention Type: Behavioral (Behavioral and Environmental Modification) * Intervention Name: 13-Component Multidimensional Sleep Hygiene Optimization Protocol 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. |
Who may qualify
- Ages
- 18 years and older
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- ≥ 18 years of age
- Active national sitting volleyball team member
- ≥ 1 year of national team experience
- ≥ 20 hours of weekly training
Key exclusion criteria (2 listed)
- Non-compliance with the team camp program
- Major neurological diagnosis
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Multidimensional Sleep Hygiene Optimization ProtocolThis 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. | Behavioural | Sleep enviroment intervention /Experimental Group (Turkish Women's National Sitting Volleyball Team) |
Primary outcome
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)
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.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Oct 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ahmet Sansi study director
Bolu Abant Izzet Baysal University Sport Science Faculty
Semih KARAMAN, PhD (c) principal investigator
Bolu Abant Izzet Baysal University Sport Science Faculty
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Multidimensional Sleep Hygiene Optimization Protocol in people with Cognitive Functions, run by Abant Izzet Baysal University at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 5 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
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)). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Oct 2026.