Hydration EducationNCT07897552
Effect of Hydration Education on Young Judokas
A study testing Hydration in people with Hydration Education, run by Kastamonu University at 1 site in Turkey (Türkiye).
Trial summary
Brief Summary The goal of this clinical trial is to learn whether a single-session hydration education intervention combined with hydration-promoting materials can improve hydration status in male child judo athletes (judokas) aged 8-15 years. Read more about this study
- Who is it for?
- Ages 10 to 15 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Hydration Education
- What is being tested?
- Hydration
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 34 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 15 Jan 2026to 20 Jun 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 10 to 15 years
- Men only
- Healthy volunteers accepted
- Child
Who may be able to join
- Holding at least a yellow belt
- Having a minimum of one year of judo training experience
- Currently training four to five days per week.
Who cannot join
- Not holding a yellow belt
- Having judo experience less than a year
- Training less than 4 days per week.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Hydration Education and Promoting Materials on Hydration Status in Pediatric Judo Athletes: A 60-Day Follow-Up Study
Brief Summary
The goal of this clinical trial is to learn whether a single-session hydration education intervention combined with hydration-promoting materials can improve hydration status in male child judo athletes (judokas) aged 8-15 years. The main questions it aims to answer are:
Read more
Do urine-based hydration markers - specifically urine specific gravity (USG) and urine color (UC) - improve following a single-session hydration education intervention combined with hydration-promoting materials, and do these improvements persist over a 60-day follow-up period? Do perceptual hydration indicators, including thirst sensation and mouth dryness, decrease following the intervention and across the follow-up period? Does fluid intake during standardized judo training sessions increase following the intervention? Does exercise-induced body mass change during training differ across the follow-up period compared to baseline?
Participants will:
Attend a single approximately 40-minute hydration education session covering the role of water in the body, causes and consequences of fluid loss, strategies for staying hydrated, and individualized hydration feedback based on their urine specific gravity values Receive hydration-promoting materials including a personalized water bottle, an informational brochure summarizing the education session with a urine color reference chart, and have access to hydration reminder posters and urine color scales placed in their training facility Complete four assessment sessions - one before the intervention (baseline) and three after the intervention (at 1 day, 30 days, and 60 days) - each consisting of a standardized approximately 60-minute judo training session Provide urine samples immediately before and after each training session for hydration assessment Have their body mass measured before and after each training session Rate their thirst sensation and mouth dryness on a visual analog scale before and after each training session Have their fluid intake recorded during each training session
- Conditions
- Hydration Education
- Being tested
- Hydration
- Keywords
- hydration, hypohydration, combat sports, judo
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
HydrationOther
Also called Hydration education and tools
Hydration Education. Following the baseline assessment, participants received a single, approximately 40-minute hydration education session delivered immediately after training. Session content covered the physiological role of water, causes and consequences of fluid loss, effects of dehydration on health and athletic performance, urine color as a practical hydration indicator, and individualized daily fluid intake targets. All content was tailored to a child-appropriate level, avoiding technical terminology. Based on pre- and post-training USG values obtained during the baseline phase, each athlete received personalized feedback on their current hydration status and was advised either to increase daily fluid intake or to maintain their existing habits.
Hydration-Promoting Materials. Immediately following the education session, each participant received a personally labelled water bottle and was encouraged to carry it throughout the day and during training. A summary brochure - includ
| Study group | Role | What they receive |
|---|---|---|
| Hydration education and tools | Experimental | Not described Receives: Other: Hydration |
What is being measured
The primary outcome is the main question the study is designed to answer.
Urine specific gravity (USG)
Changes in USG was monitored with a digital refractometer (ATAGO PAL, Japan) by the same researcher at baseline, 1, 30 and 60 days after the education.
Measured: Before and after each training session at baseline, 1, 30 and 60 days after the education.
Urine colour (UC)
UC was monitored by the same researcher under the LED light at baseline, 1, 30 and 60 days after the education.
Measured: Before and after each training session at baseline, 1, 30 and 60 days after the education.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Oct 2026
- Study start15 Jan 2026
- Primary completion15 May 2026
- Study completion20 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Hydration EducationStudies of the same condition, open and under way.
- 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
- Screening
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 34 participants (actual)
Sponsor and investigators
- Lead sponsor
- Kastamonu University
- Sponsor type
- University, hospital or other
- Collaborators
- Harran University
- Responsible party
- Principal investigator, Bayram Ceylan, Kastamonu University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07897552
- Sponsor's protocol ID
- 802049
- Status last verified
- Oct 2026
- First submitted
- 25 Sep 2026
- Last updated
- 27 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Ceylan, B., Baydil, B., Öztürk, F., Taşkın, H. B., Sarıkaya, U., Karaman, S., Eyuboğlu, E., & Balcı, Ş. S. (2026). The impact of brief one-time education and coach encouragement on hydration status in youth judo athletes. International Journal of Sports Science & Coaching, 17479541261424473. Ceylan, B., Kons, R. L., Detanico, D., & Šimenko, J. (2022). Acute dehydration impairs performance and physiological responses in highly trained judo athletes. Biology, 11(6), 872. Ceylan, B., & Santos, L. (2022). Fluid intake, hydration status and body mass changes in U-15 judo athletes during a training day. Acta Scientiarum. Health Sciences, 44. Ceylan, B., Taşcan, M. B., Simenko, J., & Balcı, Ş. S. (2023). Habit or lack of education? Hypohydration is present in elite senior judo athletes even during a weight-stable training camp. International Journal of Sports Science & Coaching, 18(6), 2189-2197.
Study at a glance
From the registry record, last updated by the sponsor on 27 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Hydration Education and Promoting Materials on Hydration Status in Pediatric Judo Athletes: A 60-Day Follow-Up Study
- ClinicalTrials.gov ID
- NCT07897552
- Acronym / sponsor ID
- 802049
- Conditions
- Hydration Education
- Keywords
- hydration, hypohydration, combat sports, judo
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 34 participants (actual)
- Lead sponsor
- Kastamonu UniversityUniversity, hospital or other
- Collaborators
- Harran University
- Study start
- 15 Jan 2026 (actual)
- Primary completion
- 15 May 2026 (actual)
- Study completion
- 20 Jun 2026 (actual)
- First posted
- 27 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.
Brief Summary
The goal of this clinical trial is to learn whether a single-session hydration education intervention combined with hydration-promoting materials can improve hydration status in male child judo athletes (judokas) aged 8-15 years. The main questions it aims to answer are:
Do urine-based hydration markers - specifically urine specific gravity (USG) and urine color (UC) - improve following a single-session hydration education intervention combined with hydration-promoting materials, and do these improvements persist over a 60-day follow-up period? Do perceptual hydration indicators, including thirst sensation and mouth dryness, decrease following the intervention and across the follow-up period? Does fluid intake during standardized judo training sessions increase following the intervention? Does exercise-induced body mass change during training differ across the follow-up period compared to baseline?
Participants will:
Attend a single approximately 40-minute hydration education session covering the role of water in the body, causes and consequences of fluid loss, strategies for staying hydrated, and individualized hydration feedback based on their urine specific gravity values Receive hydration-promoting materials including a personalized water bottle, an informational brochure summarizing the education session with a urine color reference chart, and have access to hydration reminder posters and urine color scales placed in their training facility Complete four assessment sessions - one before the intervention (baseline) and three after the intervention (at 1 day, 30 days, and 60 days) - each consisting of a standardized approximately 60-minute judo training session Provide urine samples immediately before and after each training session for hydration assessment Have their body mass measured before and after each training session Rate their thirst sensation and mouth dryness on a visual analog scale before and after each training session Have their fluid intake recorded during each training session
Study design
- Primary purpose
- Screening
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Hydration education and tools | Experimental | Other: Hydration |
Who may qualify
- Ages
- 10 to 15 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (3 listed)
- Holding at least a yellow belt
- Having a minimum of one year of judo training experience
- Currently training four to five days per week.
Key exclusion criteria (3 listed)
- Not holding a yellow belt
- Having judo experience less than a year
- Training less than 4 days per week.
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 |
|---|---|---|
| HydrationAlso: Hydration education and toolsHydration Education. Following the baseline assessment, participants received a single, approximately 40-minute hydration education session delivered immediately after training. Session content covered the physiological role of water, causes and consequences of fluid loss, effects of dehydration on health and athletic performance, urine color as a practical hydration indicator, and individualized daily fluid intake targets. All content was tailored to a child-appropriate level, avoiding technical terminology. Based on pre- and post-training USG values obtained during the baseline phase, each athlete received personalized feedback on their current hydration status and was advised either to increase daily fluid intake or to maintain their existing habits. Hydration-Promoting Materials. Immediately following the education session, each participant received a personally labelled water bottle and was encouraged to carry it throughout the day and during training. A summary brochure - includ | Other | Hydration education and tools |
Primary outcome
Urine specific gravity (USG)
Time frame: Before and after each training session at baseline, 1, 30 and 60 days after the education.
Changes in USG was monitored with a digital refractometer (ATAGO PAL, Japan) by the same researcher at baseline, 1, 30 and 60 days after the education.
Urine colour (UC)
Time frame: Before and after each training session at baseline, 1, 30 and 60 days after the education.
UC was monitored by the same researcher under the LED light at baseline, 1, 30 and 60 days after the education.
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 27 Oct 2026.
- BackgroundCeylan, B., Baydil, B., Öztürk, F., Taşkın, H. B., Sarıkaya, U., Karaman, S., Eyuboğlu, E., & Balcı, Ş. S. (2026). The impact of brief one-time education and coach encouragement on hydration status in youth judo athletes. International Journal of Sports Science & Coaching, 17479541261424473. Ceylan, B., Kons, R. L., Detanico, D., & Šimenko, J. (2022). Acute dehydration impairs performance and physiological responses in highly trained judo athletes. Biology, 11(6), 872. Ceylan, B., & Santos, L. (2022). Fluid intake, hydration status and body mass changes in U-15 judo athletes during a training day. Acta Scientiarum. Health Sciences, 44. Ceylan, B., Taşcan, M. B., Simenko, J., & Balcı, Ş. S. (2023). Habit or lack of education? Hypohydration is present in elite senior judo athletes even during a weight-stable training camp. International Journal of Sports Science & Coaching, 18(6), 2189-2197.
- Individual participant dataSharing planned: Undecided
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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.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Hydration in people with Hydration Education, run by Kastamonu 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 3 inclusion and 3 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 27 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?
Urine specific gravity (USG) (time frame: Before and after each training session at baseline, 1, 30 and 60 days after the education.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07897552, which also lists 1 linked publication.
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 27 Oct 2026.