Acute Effects of Randori and Yakusoku Geiko in Young Judokas
28 de agosto de 2026 atualizado por: 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.
Visão geral do estudo
Status
Ainda não está recrutando
Intervenção / Tratamento
Tipo de estudo
Intervencional
Inscrição (Estimado)
18
Estágio
- Não aplicável
Contactos e Locais
Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.
Contato de estudo
- Nome: Muhammed Sıddık Çemç, Dr.
- Número de telefone: +90 537 016 29 25
- E-mail: mscemc@gmail.com
Locais de estudo
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Türkiye
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Istanbul, Türkiye, Turquia (Türkiye), 34342
- Boğaziçi University
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Contato:
- Muhammed Sıddık Çemç, Dr.
- Número de telefone: +90 537 016 29 25
- E-mail: mscemc@gmail.com
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Investigador principal:
- Muhammed Sıddık Çemç, Dr.
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Critérios de participação
Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
Aceita Voluntários Saudáveis
Sim
Descrição
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.
Plano de estudo
Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: Randomizado
- Modelo Intervencional: Atribuição cruzada
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: Sequence 1: Randori → Yakusoku Geiko → Control
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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.
|
|
Experimental: 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.
|
|
Experimental: 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.
|
|
Experimental: 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.
|
|
Experimental: 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.
|
|
Experimental: 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.
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Prazo |
|---|---|
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Change in King-Devick Test Completion Time
Prazo: 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
Prazo: 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.
|
Medidas de resultados secundários
Medida de resultado |
Prazo |
|---|---|
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Change in Heart Rate
Prazo: 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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Colaboradores e Investigadores
É aqui que você encontrará pessoas e organizações envolvidas com este estudo.
Patrocinador
Datas de registro do estudo
Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.
Datas Principais do Estudo
Início do estudo (Estimado)
15 de setembro de 2026
Conclusão Primária (Estimado)
15 de outubro de 2026
Conclusão do estudo (Estimado)
30 de outubro de 2026
Datas de inscrição no estudo
Enviado pela primeira vez
28 de agosto de 2026
Enviado pela primeira vez que atendeu aos critérios de CQ
28 de agosto de 2026
Primeira postagem (Real)
1 de setembro de 2026
Atualizações de registro de estudo
Última Atualização Postada (Real)
1 de setembro de 2026
Última atualização enviada que atendeu aos critérios de controle de qualidade
28 de agosto de 2026
Última verificação
1 de agosto de 2026
Mais Informações
Termos relacionados a este estudo
Outros números de identificação do estudo
- E-84391427-050.04-297822
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
NÃO
Descrição do plano 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.
Informações sobre medicamentos e dispositivos, documentos de estudo
Estuda um medicamento regulamentado pela FDA dos EUA
Não
Estuda um produto de dispositivo regulamentado pela FDA dos EUA
Não
Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .