NCT07440589

Brief Summary

It is imperative to recognise elite female sitting volleyball players as a high-risk group with regard to sleep deprivation. However, there is a paucity of research investigating the efficacy of sleep hygiene education for this demographic. The objective of this study is to The present study aims to examine the effect of sleep hygiene education on sleep quality and behaviour in elite female sitting volleyball players using mixed methods.

Trial Health

43
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
12

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Feb 2026

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

February 13, 2026

Completed
14 days until next milestone

First Posted

Study publicly available on registry

February 27, 2026

Completed
Same day until next milestone

Study Start

First participant enrolled

February 27, 2026

Completed
Same day until next milestone

Primary Completion

Last participant's last visit for primary outcome

February 27, 2026

Completed
1 month until next milestone

Study Completion

Last participant's last visit for all outcomes

March 30, 2026

Completed
Last Updated

February 27, 2026

Status Verified

February 1, 2026

Enrollment Period

Same day

First QC Date

February 13, 2026

Last Update Submit

February 26, 2026

Conditions

Keywords

Sleep hygienePara-AthleteSleep Behaviour

Outcome Measures

Primary Outcomes (3)

  • Changes in Sleep Behavior Scores as Measured by the Turkish Version of the Athlete (Sleep Behavior Questionnaire (ASBQ).

    Measurement Tool: The ASBQ is a 17-item five-point Likert-type questionnaire used to assess athletes' sleep habits. This tool identifies abnormal patterns and areas for improvement in an athletic context. This scale allows athletes to evaluate their own sleep behavior through self-assessment. Scoring Interpretation: The scale is evaluated based on the total score. A total score of 34 or below indicates "good sleep behavior," while a total score of 40 or above indicates "poor sleep behavior." Unit of Measure: Total Score on the ASBQ (Range: 17 to 85).

    Baseline (Pre-intervention) and Approximately 30 days after the intervention.

  • Change from Baseline in Global Sleep Quality Score Assessed by the Pittsburgh Sleep Quality Index (PSQI)

    The PSQI is a self-rated questionnaire that assesses sleep quality and disturbances over a 1-month time interval. It consists of 19 individual items that generate seven distinct component scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. Each component score is weighted equally on a scale from 0 to 3. These seven component scores are then summed to yield a single global PSQI score, which has a possible range of 0 to 21. A global score of 5 or less indicates "good sleep quality," while a score greater than 5 indicates "poor sleep quality." Therefore, higher global scores represent worse sleep quality and greater sleep difficulties. Unit of Measure: Global Score (Range: 0 to 21)

    Baseline (Pre-intervention) and Approximately 30 days after the intervention.

  • Qualitative Assessment of Behavioral Changes and Sleep Hygiene Perceptions via Semi-Structured Focus Group Interviews

    To complement the quantitative findings within a mixed-methods design, qualitative data will be collected through online focus group discussions. These sessions will utilize semi-structured interview guides specifically designed to explore participants' underlying sleep habits, their behavioral changes post-intervention, and their overall perceptions of sleep hygiene. The qualitative data (transcripts) will be subjected to thematic analysis to identify recurring patterns, context, and relationships. Unlike quantitative measures, this assessment does not yield a numerical score; instead, it generates descriptive narrative themes that evaluate the real-world effectiveness and subjective experience of the training program. Unit of Measure: Qualitative Themes and Narrative Feedback (Descriptive/Categorical)

    Conducted after the 30-day post-test data collection.

Secondary Outcomes (1)

  • Change in Social Jetlag (SJL) Calculated by Mid-Sleep Time Discrepancy

    Baseline (Pre-test) and Approximately 30 days after the intervention (Post-test).

Study Arms (1)

Turkish women's national sitting volleyball team

EXPERIMENTAL

The study's sample population will comprise all athletes who will be members of the Turkish national sitting volleyball team in the 2026 season. The selection of participants will be carried out using a purposive sampling method, and data will be collected from all volunteers who will be willing to participate in the study and who will meet the specified criteria. This approach will result in the establishment of a sample group that will reflect the full characteristics of the target population.

Behavioral: Single-Group Pretest-Posttest Design

Interventions

The method of this study will consist of a mixed-method design conducted with athletes selected from the Turkish Women's National Sitting Volleyball Team through purposive sampling. The Pittsburgh Sleep Quality Index (PSQI) will be used to assess participants' sleep quality, while the Athlete Sleep Behavior Questionnaire (ASBQ) will be employed to evaluate their sleep behaviours. Data will be collected at two distinct time points: first, prior to the implementation of a structured sleep hygiene education program, and subsequently approximately 30 days later, designated as the post-test phase. In order to provide a more in-depth explanation of the results obtained from the quantitative data and to achieve a more contextual understanding, qualitative data will be collected through two online focus group discussions conducted following the post-test.

Turkish women's national sitting volleyball team

Eligibility Criteria

Sexfemale(Gender-based eligibility)
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

  • Being an elite athlete who is a member of the Turkey Women's National Sitting Volleyball Team.
  • Actively participating in regular training sessions and competitions.
  • Willingness to participate in the planned sleep hygiene education program throughout the study period.
  • Having sufficient cognitive capacity to complete the Pittsburgh Sleep Quality Index (PSQI) and the Athlete Sleep Behavior Questionnaire (ASBQ).
  • Agreeing to participate in focus group interviews.
  • Providing voluntary participation and signing an informed consent form.

You may not qualify if:

  • Inability to participate regularly in training sessions during the study period due to acute injury, illness, or surgical intervention.
  • Failure to attend the education program or assessment procedures regularly.
  • Incomplete completion of data collection instruments or non-participation in focus group interviews.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Bolu Abant İzzet Baysal University

Bolu, Province, 14030, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Sleep Hygiene

Condition Hierarchy (Ancestors)

Health BehaviorBehavior

Study Officials

  • Ahmet Sansi, PhD

    Bolu Abant Izzet Baysal University Sport Science Faculty

    STUDY DIRECTOR

Central Study Contacts

Semih KARAMAN, PhD(c)

CONTACT

Study Design

Study Type
interventional
Phase
not applicable
Allocation
NA
Masking
NONE
Purpose
OTHER
Intervention Model
SINGLE GROUP
Model Details: The study's sample population will comprise all athletes who will be members of the Turkish national sitting volleyball team in the 2026 season. The selection of participants will be carried out using a purposive sampling method, and data will be collected from all volunteers who will be willing to participate in the study and who will meet the specified criteria. This approach will result in the establishment of a sample group that will reflect the full characteristics of the target population.
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Dr.

Study Record Dates

First Submitted

February 13, 2026

First Posted

February 27, 2026

Study Start

February 27, 2026

Primary Completion

February 27, 2026

Study Completion

March 30, 2026

Last Updated

February 27, 2026

Record last verified: 2026-02

Data Sharing

IPD Sharing
Will not share

Locations