Acute Effects of Randori and Yakusoku Geiko in Young Judokas
28 agosto 2026 aggiornato da: Muhammed Sıddık Çemç, Bogazici University
Comparison of the Acute Effects of Randori and Yakusoku Geiko on Visual-Motor Performance and Heart Rate in Young Judokas
This study will compare the immediate effects of two common judo practice methods, randori and yakusoku geiko, on visual-motor performance and heart rate in young male judokas. Randori is a free-practice form of judo that involves active resistance and unpredictable interaction with an opponent, whereas yakusoku geiko is a more controlled practice method in which techniques are performed with less resistance.
The study will use a randomized, counterbalanced crossover design. The same participants will complete three conditions on separate days: randori, yakusoku geiko, and a seated rest control condition. The order of these conditions will be randomized, and there will be at least 48 hours between sessions.
Before and immediately after each condition, visual-motor performance will be assessed using the King-Devick Test, a rapid number-naming task that measures visual scanning, attention, and eye movement-related performance. Heart rate will also be measured before and immediately after each condition using a Polar H10 chest strap.
Randori and yakusoku geiko will each be performed for 4 minutes after a standardized warm-up. During the control condition, participants will rest for 4 minutes without performing physical activity. The study will examine whether these different judo practice conditions produce different immediate changes in King-Devick Test completion time, error count, and heart rate.
Panoramica dello studio
Stato
Non ancora reclutamento
Intervento / Trattamento
Tipo di studio
Interventistico
Iscrizione (Stimato)
18
Fase
- Non applicabile
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Contatto studio
- Nome: Muhammed Sıddık Çemç, Dr.
- Numero di telefono: +90 537 016 29 25
- Email: mscemc@gmail.com
Luoghi di studio
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Türkiye
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Istanbul, Türkiye, Turchia (Türkiye), 34342
- Boğaziçi University
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Contatto:
- Muhammed Sıddık Çemç, Dr.
- Numero di telefono: +90 537 016 29 25
- Email: mscemc@gmail.com
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Investigatore principale:
- Muhammed Sıddık Çemç, Dr.
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Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
- Adulto
Accetta volontari sani
Sì
Descrizione
Inclusion Criteria:
Male participants. Licensed judo athletes residing in Istanbul. Regular participation in judo training at least three days per week. Willingness to provide informed consent. Willingness to avoid high-intensity exercise during the 24 hours before each testing session.
Exclusion Criteria:
Any known history of disease. Regular medication use. Failure to meet the study inclusion criteria.
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Scienza basilare
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
|
Sperimentale: Sequence 1: Randori → Yakusoku Geiko → Control
|
Participants will complete a 4-minute randori session following an approximately 15-minute standardized warm-up.
Randori will involve free judo practice with active resistance and unpredictable interaction between matched training partners.
Participants will be paired with consideration of weight category and belt level.
Participants will complete a 4-minute yakusoku geiko session following an approximately 15-minute standardized warm-up.
Yakusoku geiko will involve controlled and repetitive judo technique practice with little or no active resistance from the training partner.
Participants will be paired with consideration of weight category and belt level.
|
|
Sperimentale: Sequence 2: Randori → Control → Yakusoku Geiko
|
Participants will complete a 4-minute randori session following an approximately 15-minute standardized warm-up.
Randori will involve free judo practice with active resistance and unpredictable interaction between matched training partners.
Participants will be paired with consideration of weight category and belt level.
Participants will complete a 4-minute yakusoku geiko session following an approximately 15-minute standardized warm-up.
Yakusoku geiko will involve controlled and repetitive judo technique practice with little or no active resistance from the training partner.
Participants will be paired with consideration of weight category and belt level.
|
|
Sperimentale: Sequence 3: Yakusoku Geiko → Randori → Control
|
Participants will complete a 4-minute randori session following an approximately 15-minute standardized warm-up.
Randori will involve free judo practice with active resistance and unpredictable interaction between matched training partners.
Participants will be paired with consideration of weight category and belt level.
Participants will complete a 4-minute yakusoku geiko session following an approximately 15-minute standardized warm-up.
Yakusoku geiko will involve controlled and repetitive judo technique practice with little or no active resistance from the training partner.
Participants will be paired with consideration of weight category and belt level.
|
|
Sperimentale: Sequence 4: Yakusoku Geiko → Control → Randori
|
Participants will complete a 4-minute randori session following an approximately 15-minute standardized warm-up.
Randori will involve free judo practice with active resistance and unpredictable interaction between matched training partners.
Participants will be paired with consideration of weight category and belt level.
Participants will complete a 4-minute yakusoku geiko session following an approximately 15-minute standardized warm-up.
Yakusoku geiko will involve controlled and repetitive judo technique practice with little or no active resistance from the training partner.
Participants will be paired with consideration of weight category and belt level.
|
|
Sperimentale: Sequence 5: Control → Randori → Yakusoku Geiko
|
Participants will complete a 4-minute randori session following an approximately 15-minute standardized warm-up.
Randori will involve free judo practice with active resistance and unpredictable interaction between matched training partners.
Participants will be paired with consideration of weight category and belt level.
Participants will complete a 4-minute yakusoku geiko session following an approximately 15-minute standardized warm-up.
Yakusoku geiko will involve controlled and repetitive judo technique practice with little or no active resistance from the training partner.
Participants will be paired with consideration of weight category and belt level.
|
|
Sperimentale: Sequence 6: Control → Yakusoku Geiko → Randori
|
Participants will complete a 4-minute randori session following an approximately 15-minute standardized warm-up.
Randori will involve free judo practice with active resistance and unpredictable interaction between matched training partners.
Participants will be paired with consideration of weight category and belt level.
Participants will complete a 4-minute yakusoku geiko session following an approximately 15-minute standardized warm-up.
Yakusoku geiko will involve controlled and repetitive judo technique practice with little or no active resistance from the training partner.
Participants will be paired with consideration of weight category and belt level.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Lasso di tempo |
|---|---|
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Change in King-Devick Test Completion Time
Lasso di tempo: Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions, with 48 hours to 7 days between sessions.
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Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions, with 48 hours to 7 days between sessions.
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Change in King-Devick Test Error Count
Lasso di tempo: Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions, with 48 hours to 7 days between sessions.
|
Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions, with 48 hours to 7 days between sessions.
|
Misure di risultato secondarie
Misura del risultato |
Lasso di tempo |
|---|---|
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Change in Heart Rate
Lasso di tempo: Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions.
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Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions.
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Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Sponsor
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio (Stimato)
15 settembre 2026
Completamento primario (Stimato)
15 ottobre 2026
Completamento dello studio (Stimato)
30 ottobre 2026
Date di iscrizione allo studio
Primo inviato
28 agosto 2026
Primo inviato che soddisfa i criteri di controllo qualità
28 agosto 2026
Primo Inserito (Effettivo)
1 settembre 2026
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
1 settembre 2026
Ultimo aggiornamento inviato che soddisfa i criteri QC
28 agosto 2026
Ultimo verificato
1 agosto 2026
Maggiori informazioni
Termini relativi a questo studio
Altri numeri di identificazione dello studio
- E-84391427-050.04-297822
Piano per i dati dei singoli partecipanti (IPD)
Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?
NO
Descrizione del piano IPD
Individual participant data will not be shared because no formal data-sharing plan has been established for this study.
Study findings will be reported in aggregate form in scientific publications and presentations.
Informazioni su farmaci e dispositivi, documenti di studio
Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti
No
Studia un dispositivo regolamentato dalla FDA degli Stati Uniti
No
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .