Judo PerformanceJUDO-CORENCT07586020
Core Endurance and Throw Performance in Young Judokas
A study testing McGill's Core Endurance Test Battery, Backward Overhead Medicine Ball Throw and Flamenco Balance Test in people with Judo Performance and Balance, run by Inonu University at 1 site in Turkey (Türkiye).
Trial summary
This cross-sectional study aims to investigate the association between core endurance, medicine ball throw performance, and static balance in young male judokas aged 10-13 years. Read more about this study
- Who is it for?
- Ages 10 to 13 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Judo Performance, Balance, Explosive Power
- What is being tested?
- McGill's Core Endurance Test Battery, Backward Overhead Medicine Ball Throw and Flamenco Balance Test
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 15 Feb 2026to 15 May 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 13 years
- Men only
- Healthy volunteers accepted
- Child
Who may be able to join
- Being a male judoka aged between 10 and 13 years.
- Having at least 2 years of regular judo training experience
- Training at least 3 days per week regularly
- Volunteering to participate in the study and providing parental informed consent
- Being free from any physical injuries or health conditions that could interfere with physical performance testing
Who cannot join
- Having any acute or chronic musculoskeletal injuries within the last 6 months
- Having a history of surgery that affects physical movement or balance
- Using any medication or supplements that could influence physical performance or balance during the testing period
- Failure to complete all the required test protocols
- Any neurological or vestibular disorders that affect static balance
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
epartment of Physical Education and Sport Teaching, Faculty of Sports Sciences, Inonu University,
Malatya, Malatya, 44280
About this study
Official title: Associations of Core Endurance With Medicine Ball Throw Performance and Static Balance in Young Male Judokas: A Cross-Sectional Study
This cross-sectional study aims to investigate the association between core endurance, medicine ball throw performance, and static balance in young male judokas aged 10-13 years. Core endurance will be assessed using McGill's isometric core endurance protocol, including trunk flexion, trunk extension, and lateral bridge tests. Explosive performance will be evaluated using the backward overhead medicine ball throw test, while static balance will be assessed using the Flamingo Balance Test. Correlation and regression analyses will be conducted to examine the relationships between core endurance and performance variables. The findings may contribute to understanding the role of core endurance in youth judo performance.
Read the detailed description
Judo is a high-intensity combat sport that requires explosive power, postural control, balance, and efficient force transmission throughout the kinetic chain. Core musculature plays a central role in stabilizing the trunk and transferring force between the lower and upper extremities during sport-specific movements. In judo, throwing techniques such as ippon-seoi-nage, uchi-mata, and harai-goshi require substantial trunk stabilization and rotational force production.
Although previous studies have investigated the importance of core training and trunk muscle function in athletic performance, limited evidence exists regarding the association between core endurance and sport-related performance parameters in young judokas. Understanding these relationships may provide valuable insights for training program design in youth judo athletes.
Therefore, the purpose of this cross-sectional observational study is to examine the association between core endurance, medicine ball throw performance, and static balance in male judokas aged 10-13 years.
Twenty male judokas with at least two years of regular judo training experience will participate in the study. Core endurance will be evaluated using McGill's isometric core endurance test battery, including trunk flexion, trunk extension, right lateral bridge, and left lateral bridge tests. Explosive upper-body performance will be assessed using the backward overhead medicine ball throw test with a 2-kg medicine ball. Static balance performance will be evaluated using the Flamingo Balance Test.
Data collection will be conducted over two testing sessions separated by at least 48 hours. Spearman rank correlation analyses and regression analyses will be used to examine the relationships between variables.
The study hypothesizes that greater core endurance will be positively associated with medicine ball throw performance and static balance performance in young male judokas.
- Conditions
- Judo Performance, Balance, Explosive Power, Core Endurance
- Being tested
- McGill's Core Endurance Test Battery, Backward Overhead Medicine Ball Throw, Flamenco Balance Test
- Keywords
- Core endurance, medicine ball throw, balance, judo, young athletes, cross-sectional study
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
McGill's Core Endurance Test BatteryOther
Participants performed four isometric endurance tests: trunk flexor, trunk extensor, and right/left lateral bridge tests to assess core stability.
Backward Overhead Medicine Ball ThrowOther
Used to measure explosive power. Participants threw a 2 kg medicine ball backward over their head for maximum distance
Flamenco Balance TestOther
A static balance test where participants stood on one leg on a metal beam for as long as possible
| Study group | Role | What they receive |
|---|---|---|
| judokas | Experimental | A single group of 20 young male judokas (aged 10-13 years) who underwent physical performance testing, including core endurance, medicine ball throw, and static balance assessments. Receives: Other: McGill's Core Endurance Test Battery; Other: Backward Overhead Medicine Ball Throw; Other: Flamenco Balance Test |
What is being measured
The primary outcome is the main question the study is designed to answer.
Core Endurance (McGill's Test Battery)
Total core endurance measured through four isometric tests: trunk flexion, trunk extension, right lateral bridge, and left lateral bridge. Each test measures the duration (in seconds) the participant can maintain the required position.
Measured: Baseline
Secondary outcomes (2)
Explosive Power (Backward Overhead Medicine Ball Throw)
The maximum distance achieved by throwing a 2 kg medicine ball backward over the head. The best of three trials is recorded.
Measured: Baseline
Static Balance (Flamenco Balance Test)
Assessment of static balance where the number of falls or balance losses are counted during a 1-minute period while standing on a metal beam.
Measured: Baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 May 2026
- Study start15 Feb 2026
- Primary completion15 Mar 2026
- Study completion15 May 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 Judo PerformanceStudies of the same condition, open and under way.
- More trials run by Inonu 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
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- This is a cross-sectional study evaluating the associations between core endurance, medicine ball throw performance, and static balance in a single cohort of young male judokas.
- Masking
- None (open label)
- Enrolment
- 20 participants (actual)
Sponsor and investigators
- Lead sponsor
- Inonu University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Assoc. Prof. Dr. Özgür EKEN, Inonu University
- Investigators
- Özgür Eken, PhD, Assoc. Prof, Principal investigator, Inonu University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07586020
- Sponsor's protocol ID
- INU-JUDO-CORE-2025-01
- Acronym
- JUDO-CORE
- Status last verified
- Jun 2026
- First submitted
- 8 May 2026
- Last updated
- 2 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: The individual participant data will not be shared to maintain the confidentiality of the participants, as per the ethical approval guidelines
Publications
Stockbrugger BA, Haennel RG. Validity and reliability of a medicine ball explosive power test. J Strength Cond Res. 2001 Nov;15(4):431-8.
PubMed 11726253
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Associations of Core Endurance With Medicine Ball Throw Performance and Static Balance in Young Male Judokas: A Cross-Sectional Study
- ClinicalTrials.gov ID
- NCT07586020
- Acronym / sponsor ID
- JUDO-CORE / INU-JUDO-CORE-2025-01
- Conditions
- Judo Performance, Balance, Explosive Power, Core Endurance
- Keywords
- Core endurance, medicine ball throw, balance, judo, young athletes, cross-sectional study
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 20 participants (actual)
- Lead sponsor
- Inonu UniversityUniversity, hospital or other
- Study start
- 15 Feb 2026 (actual)
- Primary completion
- 15 Mar 2026 (actual)
- Study completion
- 15 May 2026 (actual)
- First posted
- 14 May 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 cross-sectional study aims to investigate the association between core endurance, medicine ball throw performance, and static balance in young male judokas aged 10-13 years. Core endurance will be assessed using McGill's isometric core endurance protocol, including trunk flexion, trunk extension, and lateral bridge tests. Explosive performance will be evaluated using the backward overhead medicine ball throw test, while static balance will be assessed using the Flamingo Balance Test. Correlation and regression analyses will be conducted to examine the relationships between core endurance and performance variables. The findings may contribute to understanding the role of core endurance in youth judo performance.
Detailed description
Judo is a high-intensity combat sport that requires explosive power, postural control, balance, and efficient force transmission throughout the kinetic chain. Core musculature plays a central role in stabilizing the trunk and transferring force between the lower and upper extremities during sport-specific movements. In judo, throwing techniques such as ippon-seoi-nage, uchi-mata, and harai-goshi require substantial trunk stabilization and rotational force production.
Although previous studies have investigated the importance of core training and trunk muscle function in athletic performance, limited evidence exists regarding the association between core endurance and sport-related performance parameters in young judokas. Understanding these relationships may provide valuable insights for training program design in youth judo athletes.
Therefore, the purpose of this cross-sectional observational study is to examine the association between core endurance, medicine ball throw performance, and static balance in male judokas aged 10-13 years.
Twenty male judokas with at least two years of regular judo training experience will participate in the study. Core endurance will be evaluated using McGill's isometric core endurance test battery, including trunk flexion, trunk extension, right lateral bridge, and left lateral bridge tests. Explosive upper-body performance will be assessed using the backward overhead medicine ball throw test with a 2-kg medicine ball. Static balance performance will be evaluated using the Flamingo Balance Test.
Data collection will be conducted over two testing sessions separated by at least 48 hours. Spearman rank correlation analyses and regression analyses will be used to examine the relationships between variables.
The study hypothesizes that greater core endurance will be positively associated with medicine ball throw performance and static balance performance in young male judokas.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- This is a cross-sectional study evaluating the associations between core endurance, medicine ball throw performance, and static balance in a single cohort of young male judokas.
| Arm | Type | Receives |
|---|---|---|
| judokas | Experimental | Other: McGill's Core Endurance Test Battery, Other: Backward Overhead Medicine Ball Throw, Other: Flamenco Balance TestA single group of 20 young male judokas (aged 10-13 years) who underwent physical performance testing, including core endurance, medicine ball throw, and static balance assessments. |
Who may qualify
- Ages
- 10 to 13 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (5 listed)
- Being a male judoka aged between 10 and 13 years.
- Having at least 2 years of regular judo training experience
- Training at least 3 days per week regularly
- Volunteering to participate in the study and providing parental informed consent
- Being free from any physical injuries or health conditions that could interfere with physical performance testing
Key exclusion criteria (5 listed)
- Having any acute or chronic musculoskeletal injuries within the last 6 months
- Having a history of surgery that affects physical movement or balance
- Using any medication or supplements that could influence physical performance or balance during the testing period
- Failure to complete all the required test protocols
- Any neurological or vestibular disorders that affect static balance
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 |
|---|---|---|
| McGill's Core Endurance Test BatteryParticipants performed four isometric endurance tests: trunk flexor, trunk extensor, and right/left lateral bridge tests to assess core stability. | Other | judokas |
| Backward Overhead Medicine Ball ThrowUsed to measure explosive power. Participants threw a 2 kg medicine ball backward over their head for maximum distance | Other | judokas |
| Flamenco Balance TestA static balance test where participants stood on one leg on a metal beam for as long as possible | Other | judokas |
Primary outcome
Core Endurance (McGill's Test Battery)
Time frame: Baseline
Total core endurance measured through four isometric tests: trunk flexion, trunk extension, right lateral bridge, and left lateral bridge. Each test measures the duration (in seconds) the participant can maintain the required position.
2 secondary outcomes
Explosive Power (Backward Overhead Medicine Ball Throw)
Time frame: Baseline
Static Balance (Flamenco Balance Test)
Time frame: Baseline
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 2 Jul 2026.
- Background: PubMed 11726253Stockbrugger BA, Haennel RG. Validity and reliability of a medicine ball explosive power test. J Strength Cond Res. 2001 Nov;15(4):431-8.
- Individual participant dataSharing planned: No. The individual participant data will not be shared to maintain the confidentiality of the participants, as per the ethical approval guidelines
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Visual Performance, Heart Rate Response
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Effects of Neuroathletic Training on Judokas' Physical, Cognitive, and Performance Abilities
Neuroathletic Training, Exercise
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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.
Özgür Eken, PhD, Assoc. Prof principal investigator
Inonu University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing McGill's Core Endurance Test Battery, Backward Overhead Medicine Ball Throw and Flamenco Balance Test in people with Judo Performance and Balance, run by Inonu 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 5 inclusion and 5 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 2 Jul 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?
Core Endurance (McGill's Test Battery) (time frame: Baseline). 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 NCT07586020, 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 2 Jul 2026.