Acute Effects of Randori and Yakusoku Geiko in Young Judokas

N/ANot Yet RecruitingNCT07798622

Bogazici University18 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Visual Performance

Interventions

RandoriBEHAVIORAL

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.

Yakusoku GeikoBEHAVIORAL

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.

Eligibility

Sex: MALEMin age: 18 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

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.

Outcomes

Primary Outcomes

Change in King-Devick Test Completion Time

Time frame: 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.

Change in King-Devick Test Error Count

Time frame: 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.

Secondary Outcomes

Change in Heart Rate

Time frame: Immediately before and immediately after each study condition (randori, yakusoku geiko, and control) during three separate testing sessions.