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Baseline Neuromuscular Performance and Responses to a Simulated Match in Young Athletes (SIMMATCH-NM)

6 november 2026 bijgewerkt door: Assoc. Prof. Dr. Özgür EKEN, Inonu University

Predictive Power of Baseline Neuromuscular Performance Characteristics for Physiological and Perceptual Responses After a Simulated Match in Young Athletes

This study looks at whether the physical fitness of young judo athletes before a match can help predict how their bodies and effort perception respond after a match. Judo matches are short, intense and tiring. After a match, athletes show higher blood lactate (a marker of intense effort), weaker grip strength and lower jump height. Not much is known about whether baseline tests of core endurance, throwing power, speed, agility and force-velocity profile can predict these changes in young athletes. Male judo athletes aged 10-13 years will complete these baseline tests in one session and then take part in one 3-minute simulated judo match with a training partner of similar body mass. Blood lactate, vertical jump height and grip strength will be measured before and right after the match, and athletes will rate how hard the match felt. The study will examine how the changes after the match relate to the baseline test results. The findings may help coaches monitor training load and plan conditioning for young judo athletes.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Judo is a high-intensity intermittent combat sport. Matches produce marked blood lactate accumulation, loss of handgrip strength, and reduced lower-body power. Baseline physical profiling is widely used to monitor athletic development, but its ability to predict individual physiological and perceptual responses to a judo match in young athletes is not well understood.

This is a single-group, pre-post study. Fifteen male judo athletes aged 10-13 years will be recruited in Malatya, Turkey. Written informed consent will be obtained from parents or legal guardians, and assent from participants. About one week before testing, participants are familiarized with the procedures and the Borg 6-20 rating of perceived exertion (RPE) scale. Participants avoid high-intensity training, caffeine and ergogenic supplements for 48 hours before testing. Testing takes place in a climate-controlled hall (20-22 °C).

Test day: After anthropometric measurements, baseline profiling is performed: McGill core endurance tests (trunk flexion, trunk extension, right and left lateral bridge), a 2-kg backward overhead medicine ball throw, a 20-m sprint, the pro-agility test, and a force-velocity profile using Samozino's field method (MyJump2 app, 240 fps video). After a standardized 10-minute warm-up (low-intensity jogging, dynamic stretching, breakfalls), pre-match measures are taken: blood lactate (finger-prick capillary sample, single-use lancet), countermovement jump height (contact mat) and handgrip strength (hand dynamometer).

Athletes then complete one 3-minute simulated judo match (randori) under International Judo Federation rules with a training partner of similar body mass (±5 kg), supervised by a coach. Immediately afterwards, blood lactate, jump height, grip strength and RPE are measured in this order within about 3 minutes.

Pre- and post-match values are compared with paired-samples t-tests (Cohen's d). Change scores (post minus pre) for lactate, jump height and grip strength, and RPE, are related to baseline variables using Pearson correlation and simple linear regression. The sample size (minimum 15) was calculated with G*Power for a paired t-test (d = 0.80, alpha = 0.05, power = 0.80).

Studietype

Ingrijpend

Inschrijving (Geschat)

15

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Contact Back-up

Studie Locaties

  • Turkije (Türkiye)
    • Malatya
      • Malatya, Malatya, Turkije (Türkiye), 44280
        • Department of Physical Education and Sport Teaching, Faculty of Sports Sciences, Inonu University,
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

10 jaar tot 13 jaar (Kind)

Accepteert gezonde vrijwilligers

Ja

Geslachten die in aanmerking komen voor studie

Mannelijk

Beschrijving

Inclusion Criteria:

  • Actively competing judo athlete in Malatya, Turkey
  • Male, aged 10-13 years
  • At least 2 years of regular judo training and competition experience
  • At least four structured technical-tactical training sessions per week
  • No limiting musculoskeletal injury in the last 6 months
  • No musculoskeletal, cardiometabolic, or neurological condition that could prevent testing
  • Willing to participate in all planned tests
  • Written informed consent signed by parent or legal guardian, and assent from the participant

Exclusion Criteria:

  • Younger than 10 or older than 13 years
  • Musculoskeletal injury or surgery within the last 6 months
  • Musculoskeletal, cardiometabolic, or neurological condition that could prevent testing
  • Open wound, varicose veins, acute inflammation, or history of thrombosis
  • Regular use of analgesic or anti-inflammatory medication or ergogenic supplements in the last 3 months
  • Unable to attend all planned testing sessions
  • Unwilling to follow the pre-test rules (no high-intensity training, caffeine or ergogenic supplements for 48 hours; usual diet, hydration and rest)
  • Withdrawal during the study due to non-compliance, incomplete sessions, acute injury during the simulated match, serious illness, or participant request

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Fundamentele wetenschap
  • Toewijzing: NVT
  • Interventioneel model: Opdracht voor een enkele groep
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Young Judo Athletes

Male judo athletes aged 10-13 years complete baseline physical profiling, followed by one standardized 3-minute simulated judo match. Blood lactate, jump height, grip strength and perceived exertion are measured before and immediately after the match.
Ander: Simulated Judo Match

One 3-minute simulated judo match (randori) performed under International Judo Federation rules against a training partner of similar body mass (±5 kg), supervised by a coach. Athletes are instructed to fight at maximal competitive intensity.

Andere namen:
  • Randori
Diagnostische toets: Baseline Physical Performance Profiling

McGill core endurance tests, 2-kg backward overhead medicine ball throw, 20-m sprint, pro-agility test and force-velocity profile (Samozino's field method). Followed by pre- and post-match measures of blood lactate, countermovement jump height, handgrip strength and rating of perceived exertion.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change in Blood Lactate Concentration After a Simulated Judo Match
Tijdsspanne: Immediately before and within 3 minutes after the simulated match (single test session)

Change (post-match minus pre-match) in capillary blood lactate concentration (mmol/L), measured from a finger-prick sample with a portable lactate analyzer. The relationship of this change with baseline physical performance variables is also analyzed.
Immediately before and within 3 minutes after the simulated match (single test session)
Change in Countermovement Jump Height After a Simulated Judo Match
Tijdsspanne: Immediately before and within 3 minutes after the simulated match (single test session)

Change (post-match minus pre-match) in maximal isometric handgrip strength (kg) of the dominant hand, measured with a hand dynamometer (best of two trials).
Immediately before and within 3 minutes after the simulated match (single test session)

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Rating of Perceived Exertion (RPE) After a Simulated Judo Match
Tijdsspanne: Within 30 seconds after the simulated match (single test session)

Perceived effort of the simulated match rated on the Borg 6-20 RPE scale (6 = no exertion, 20 = maximal exertion).
Within 30 seconds after the simulated match (single test session)
Change in Handgrip Strength After a Simulated Judo Match
Tijdsspanne: Immediately before and within 3 minutes after the simulated match (single test session)

Change (post-match minus pre-match) in maximal isometric handgrip strength (kg) of the dominant hand, measured with a hand dynamometer (best of two trials).
Immediately before and within 3 minutes after the simulated match (single test session)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Inonu University

Onderzoekers

  • Hoofdonderzoeker: Özgür Eken, PhD, Assoc. Prof., Inonu University, Faculty of Sport Sciences
  • Studie directeur: Denizhan Caliskan, Eskisehir Provincial Directorate of Youth and Sports, Eskisehir, Türkiye

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

11 januari 2027

Primaire voltooiing (Geschat)

11 februari 2027

Studie voltooiing (Geschat)

11 februari 2027

Studieregistratiedata

Eerst ingediend

2 november 2026

Eerst ingediend dat voldeed aan de QC-criteria

6 november 2026

Eerst geplaatst (Werkelijk)

12 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

12 november 2026

Laatste update ingediend die voldeed aan QC-criteria

6 november 2026

Laatst geverifieerd

1 november 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Andere studie-ID-nummers

  • INONU-SIMMATCH-2026-02
  • SIMMATCH-2026 (Andere identificatie: Inonu University)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Beschrijving IPD-plan

Individual participant data will not be shared, because participants are minors and the consent forms state that data will be used only for the purposes of this research and kept confidential. Aggregate results will be published.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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