Search Results (159)

Olympic women’s judo has increased in complexity and competitiveness, demanding detailed tactical analysis. This observational study aimed to examine the relationship between the results of combats (Wazari [half point] vs. Ippon [full point]) and the techniques used in women’s judo combats in the Rio 2016 and Tokyo 2020 Olympic Games. A significant association was found between technique type and contest outcome (χ² = 40.004, df = 6, p < 0.001): Nage Waza (throwing techniques) produced 92.3% of Wazari, whereas Katame Waza (groundwork techniques) accounted for 61.1% of Ippon. Subgroup analysis confirmed these relationships (χ² = 17.217, df = 6, p = 0.009; Cramer’s V = 0.745), with Ashiwaza (foot/leg techniques) dominating Wazari. Uchimata was the most frequently used technique in the repechage (20%), bronze medal (22.6%), and final (23.1%) matches. In lightweights, Katame Waza dominated Ippon in finals (53.8%, χ² = 4.000, p = 0.046), while Nage Waza secured all Wazari. Middleweights also showed strong associations (χ² = 14.745, df = 1, p < 0.001; 93.9% of Wazari by Nage Waza). Although no significant association was found for heavyweights (χ² = 7.535, df = 1, p = 0.095), Katame Waza prevailed in Ippon (69.2%). These findings provide a tactical framework for tailoring technique-specific training by weight category and tournament phase to optimize outcomes in elite female judo. Full article

Sleep is critical for cognitive and psychomotor performance in demanding decision-making contexts such as sports officiating. Given the lack of research in the field, the cognitive complexity, and the high-pressure environment of judo refereeing, this study aimed to evaluate the sleep quality of active judo referees and examine differences based on gender, age, refereeing experience, and athletic background. This cross-sectional study included 73 active Turkish judo referees (42 male, 31 female; age = 29.8 ± 11.0 years). Participants completed the Pittsburgh Sleep Quality Index (PSQI), and data were analysed using t-tests, ANOVA, correlation, regression, and mediation analyses. Data showed a mean sleep time of 7:43 + 1:27 and a total PSQI score of 7.21 + 3.53, and participants had been referees for a mean of 6.58 + 8.12 years. The overall sleep quality was suboptimal, with female referees reporting significantly poorer sleep than males. No significant differences in PSQI scores were found across referee seniority levels or educational levels. Correlation analysis showed significant negative associations between PSQI scores and both age and refereeing experience. The final hierarchical regression model with the age, gender, and athletic background significantly predicted PSQI scores. Mediation analysis further revealed that referee qualification level indirectly influenced sleep quality through age. The study is the first one in this area of judo referring, and it highlights poor sleep quality among judo referees, regardless of experience or qualification level, with gender, age, and athletic background emerging as key predictors. The lack of sleep education in both athletic and refereeing careers suggests a need for targeted interventions, especially for younger and female referees, to improve performance and prevent health issues. Further research is needed to explore these relationships over time and in elite-level referees. Full article

Introduction: Combat sport athletes are exposed to repetitive head impacts yet also develop distinct performance-related brain adaptations. Electroencephalography (EEG) provides millisecond-level insight into both processes; however, findings are dispersed across decades of heterogeneous studies. This mechanistic review consolidates and interprets EEG evidence to elucidate how participation in combat sports shapes brain function and to identify research gaps that impede clinical translation. Methods: A structured search was conducted in March 2025 across PubMed/MEDLINE, Scopus, Cochrane Library, ResearchGate, Google Scholar, and related databases for English-language clinical studies published between January 1980 and March 2025. Eligible studies recorded raw resting or task-related EEG in athletes engaged in boxing, wrestling, judo, karate, taekwondo, kickboxing, or mixed martial arts. Titles, abstracts, and full texts were independently screened by two reviewers. Twenty-three studies, encompassing approximately 650 combat sport athletes and 430 controls, met the inclusion criteria and were included in the qualitative synthesis. Results: Early visual EEG and perfusion studies linked prolonged competitive exposure in professional boxers to focal hypoperfusion and low-frequency slowing. More recent quantitative studies refined these findings: across boxing, wrestling, and kickboxing cohorts, chronic participation was associated with reduced alpha and theta power, excess slow-wave activity, and disrupted small-world network topology—alterations that often preceded cognitive or structural impairments. In contrast, elite athletes in karate, fencing, and kickboxing consistently demonstrated neural efficiency patterns, including elevated resting alpha power, reduced task-related event-related desynchronization (ERD), and streamlined cortico-muscular coupling during cognitive and motor tasks. Acute bouts elicited transient increases in frontal–occipital delta and high beta power proportional to head impact count and cortisol elevation, while brief judo chokes triggered short-lived slow-wave bursts without lasting dysfunction. Methodological heterogeneity—including variations in channel count (1 to 64), reference schemes, and frequency band definitions—limited cross-study comparability. Conclusions: EEG effectively captures both the adverse effects of repetitive head trauma and the cortical adaptations associated with high-level combat sport training, underscoring its potential as a rapid, portable tool for brain monitoring. Standardizing acquisition protocols, integrating EEG into longitudinal multimodal studies, and establishing sex- and age-specific normative data are essential for translating these insights into practical applications in concussion management, performance monitoring, and regulatory policy. Full article

Youth violence is a pressing social issue. Many well-informed interventions to reduce youth violence fail due to low uptake. Combat sports—such as boxing, judo, and mixed martial arts—appear to encourage aggression, making them appealing to individuals prone to violent behavior. However, rather than reinforcing violence, these sports instill discipline, goal-directed behavior, and self-control. This paper argues that combat sports align with the values of at-risk youth, increasing their participation, while simultaneously teaching them emotional regulation and resilience. I propose that structured combat training provides a sustainable intervention by fostering self-awareness, cognitive control, and respect within a rule-governed environment. Furthermore, training combat instructors in emotion regulation strategies could enhance these benefits. By providing motivation, capability, and opportunity, combat sports present a viable pathway to reducing violent behavior among youth. Full article

The aim of this study was to determine the effect of a step load periodisation protocol for the rehabilitation of the anterior cruciate ligament (ACL) based on the variables of both the tempo of movement and time under tension (TUT) in normobaric hypoxia using a case study. Introduction: We verified the influence of variables such as time under tension (TUT) and the tempo of movement in hypoxia on the concentration of insulin-like growth factor 1 (IGF-1), growth hormone (GH), and erythropoietin (EPO). The effectiveness of the protocol also concerned variables such as peak torque of the knee flexors and extensors and maximum oxygen uptake (VO₂max), as well as body composition analysis. Methods: The study used a 28-year-old judoka athlete from the national team, competing in the weight category up to 73 kg. Results: The use of short partial rest breaks between series (80s) in combination with six exercises in four series and a hypoxic environment (FiO₂ = 15%) significantly increased metabolic stress, resulting in the highest increase in GH and IGF in the main phase of accumulation of the 3:1 step load. During 16 running sessions, the rehabilitated athlete achieved a significant increase in individual variables in the running test. Conclusions: The combination of a hypoxic environment combined with a periodized rehabilitation protocol can induce a number of positive hormonal, circulatory and respiratory reactions as well as positively influence muscle asymmetry, which can ultimately shorten the time it takes for an athlete to return to sport (RTS). Full article

Background: Physical activity, including its organized form, is of key importance in the motor development of children and adolescents. Among the increasingly popular physical activities in this age group are martial arts, particularly judo. In addition to its educational and social values, this discipline, in its assumptions, gives practitioners the opportunity for motor development. This study aims to assess the development of motor competence in children and adolescents up to 15 years of age practicing judo. Methods: The study was conducted using seven databases (Scopus, Web of Science, PubMed, Embase, OVID, CINHAL Ultimate and SPOLIT) across 15 years (from January 2009 to May 2024). The PRISMA methodology was used to include studies, and the CASP protocol was applied to assess the quality of these studies. Inclusion criteria were developed based on PICOS. Finally, 22 studies that met the established criteria were included. Results: Most of the studies (21) were observational, and only one was a randomized controlled trial. The review indicated that regular judo training significantly improved muscle strength, endurance, speed, coordination, flexibility, balance and body posture compared to control groups. In contrast to some other sports, judo demonstrated comparable benefits in the development of motor abilities. Conclusions: Judo is a sport discipline that significantly affects the motor development of children and adolescents. Furthermore, regular participation in training helps to achieve the daily dose of moderate-to-vigorous activity recommended by the World Health Organization in this age group. Full article

Background and Objectives: This study aimed to investigate the effects of different tension loads in post-activation potentiation protocols on agility and vertical jump performance across different times of day in trained judokas, addressing a significant gap in understanding the interaction between diurnal variations and post-activation potentiation protocol responses in combat sports. Materials and Methods: Seventeen male judokas (age: 21.41 ± 1.37 years) with ≥2 years of training experience participated in the study. Participants completed three different protocols: specific warm-up, the 80% post-activation potentiation protocol, and the 100% post-activation potentiation protocol, performed both in the morning (09:00–11:00) and evening (17:00–19:00) sessions. Performance was assessed using the Illinois Agility Test and countermovement jump. Protocols were randomized and counterbalanced over a 3-week period, with a minimum 48 h recovery between sessions. Statistical analysis employed repeated measures ANOVA (3 × 2) with Greenhouse–Geisser corrections. Results: Significant differences were observed in both protocols and time interactions for agility (F = 41.691, ηp² = 0.864, p < 0.001; F = 23.893, ηp² = 0.123, p < 0.001) and countermovement jump performance (F = 7.471, ηp² = 0.410, p = 0.002; F = 38.651, ηp² = 0.530, p < 0.001). The 80% post-activation potentiation protocol demonstrated superior performance outcomes compared to both specific warm-up and 100% post-activation potentiation protocols. Evening performances were generally better than morning performances for both agility and countermovement jump; however, the protocols/time interaction was not statistically significant (p > 0.05). Conclusions: The 80% post-activation potentiation protocol was most effective for enhancing both agility and vertical jump performance in judokas, with superior results observed during evening sessions. These findings provide valuable insights for optimizing warm-up strategies in judo competition, suggesting that lower-intensity post-activation potentiation protocols might be more beneficial than maximal loading, particularly during evening competitions. Full article

Background/Objectives: This study aimed to examine differences in motor competence and muscular fitness between children engaged in combat sports and their peers who do not participate in structured physical activity. Methods: The sample consisted of 120 healthy eight-year-old children, evenly divided into two groups: 60 children practicing combat sports (karate, judo, and wrestling) for at least one year and 60 children without structured sports involvement. Motor competence was assessed using the Test of Gross Motor Development-2 (TGMD-2), while muscular fitness was evaluated through standing broad jump, grip strength, 30 s sit-ups, bent arm hang, medicine ball throw, and push-ups. For differences between groups, the independent samples t-test was performed. Results: Results indicated that children practicing combat sports demonstrated significantly higher locomotor and manipulative skills (p < 0.01, ES = 0.76–1.25) and superior muscular fitness across all tests (p < 0.01, ES = 0.53–1.09) compared to their peers. Conclusions: These findings highlight the positive impact of combat sports on overall physical development, particularly in enhancing motor competence, muscle strength, and endurance. Given the critical role of motor competence and physical fitness at this age, integrating combat sports into daily routines can support long-term athletic development, encourage physical activity, and enhance overall health. Future research should explore the influence of specific combat sports on distinct physical attributes and consider additional factors such as total physical activity levels. Full article

Background/Objectives: This study aimed to evaluate an artificial intelligence (AI)-enhanced electrocardiogram (ECG) screening protocol for improved accuracy, efficiency, and risk stratification across six sports: handball, football, athletics, weightlifting, judo, and karate. Methods: For each of the six sports, resting 12-lead ECGs from healthy children and junior athletes were analyzed using AI algorithms trained on annotated datasets. Parameters included the QTc intervals, PR intervals, and QRS duration. Statistical methods were used to examine each sport’s specific cardiovascular adaptations and classify cardiovascular risk predictions as low, moderate, or high risk. Results: The accuracy, sensitivity, specificity, and precision of the AI system were 97.87%, 75%, 98.3%, and 98%, respectively. Among the athletes, 94.54% were classified as low risk and 5.46% as moderate risk with AI because of borderline abnormalities like QTc prolongation or mild T-wave inversions. Sport-specific trends included increased QRS duration in weightlifters and low QTc intervals in endurance athletes. Conclusions: The statistical analyses and the AI-ECG screening protocol showed high precision and scalability for the proposed athlete cardiovascular health risk status stratification. Additional early detection research should be conducted further for diverse cohorts of individuals engaged in sports and explore other diagnostic methods that can help increase the effectiveness of screening. Full article

Background: The aim of this study was to calculate and compare the peak acceleration and peak negative velocity of uke’s shoulder during the course of two judo throwing techniques, Sode-Tsurikomi-Goshi (STG) and Tsurikomi-Goshi (TG). Methods: This study recruited male adult elite judo players with a mean age 26.5 of (SD = ±8.916), a minimum black belt ranking, and no injuries in the past six months. Participants were selected from the Aris Judo Club, Thessaloniki, Greece, ensuring high-level technique for safe and reliable outcomes. Informed consent was obtained. A Huawei 5T with a 48-megapixel camera was used to record the throws. Kinovea (version 0.8.15) software was used for two-dimensional motion analysis of shoulder displacement during throws and IBM SPSS Statistics (version 25.0, Armonk, NY, USA) with Microsoft Excel were used for the statistical analysis of the data. Results: The peak acceleration of uke’s shoulder during STG was lower than in the case of TG, but the statistical test did not confirm this difference (p = 0.1). The mean peak negative velocity of uke’s shoulder in TG was higher compared to STG, and this difference was statistically significant (p = 0.04). The test–retest reliability of STG throws was good (ICC = 0.74), and for TG throws, it was moderate (ICC = 0.60). The effect size was large for negative velocity in TG (d Cohen = 1.12) and moderate for acceleration in STG (d Cohen = 0.43). The individual test did not show a statistically significant difference between STG and TG (p = 0.2). Conclusions: A statistically significant difference in peak negative velocity in TG compared to STG would reveal that uke is thrown quicker by tori. Further research on impact forces to determine the effective mass of uke’s shoulder is advised. Full article

Objectives: This study aimed to examine the effects of endurance and high-intensity resistance training on arterial stiffness and ventricular repolarization in elite athletes. Methods: A total of 50 male athletes from different sports disciplines (volleyball, football, judo, and wrestling) and a sedentary group of 30 males participated in this study. Data collected from all participants included age, height, body weight, cardiovascular hemodynamic parameters, arterial stiffness parameters, and ECG measurements. Results: There was no significant age difference between the athlete group (20.42 ± 1.903 years) and the control group (20.97 ± 1.771 years) (p > 0.05). However, body mass index (BMI) values in the control group (24.83 ± 2.22 kg/m²) were significantly different from those in the athlete group (22.39 ± 2.663 kg/m²) (p < 0.05). Significant differences were found between the athlete and control groups in QT dispersion, systolic blood pressure, pulse pressure, and central pulse pressure values (p < 0.05), while similar results were obtained for arterial stiffness parameters (p > 0.05). Conclusions: The lack of a difference in pulse wave velocity and augmentation index (AIx) values between the athletes and the control group suggests that athletes do not bear additional risks regarding arterial stiffness. However, increased systolic blood pressure, pulse pressure, and central pulse pressure, among the hemodynamic parameters, indicate potential variations in vascular wall compliance and hemodynamic responses in the cardiovascular system. The increase in QT dispersion suggests that athletes may exhibit a heterogeneous repolarization process and an elevated risk of ventricular arrhythmias compared to the general population. Full article

This study developed and refined the Judo Teachers’ Attitudes Towards Including Participants with Intellectual Developmental Disorders (J-TAID) survey, addressing the need to assess attitudes, subjective norms, perceived behavioral control, and intention regarding inclusion, and grounded in the Theory of Planned Behavior. The survey, translated into English, Portuguese, French, and Slovenian, was administered to 163 participants in order to assess its reliability and validity using Cronbach’s alpha, Principal Component Analysis (PCA), Confirmatory Factor Analysis (CFA), and Exploratory Factor Analysis (EFA). Internal consistency regarding attitudes, subjective norms, and perceived behavioral Constructs ranged from 0,79 to 0.80, with test–retest reliability improving, demonstrating moderate to strong temporal stability (α = 0.679–0.813). The PCA and CFA identified a robust three-factor structure explaining 74% of the variance, with good model fit (RMSEA = 0.048, CFI = 0.978). Pearson correlations supported the TPB constructs. The refined J-TAID demonstrates validity and reliability for its intended purpose, although the results are still preliminary, and the limitations that were observed suggest a need for further validation. Full article

Background: The specificity of the technical actions that are performed in judo may be dependent on and vary during particular phases of the combat, thus possibly impacting injury prevalence. Therefore, towards the betterment of athletes’ safety and considering the importance of the issue of injury prevention in judo, the main goal of this study was to identify the injury occurrence during respective combat phases, i.e., the (a) first half, (b) second half, (c) last minute, and (d) golden score. Methods: A total of 26,862 elite judo athletes, including 15,571 men and 11,291 women, participated in the study. The subjects competed in 128 international tournaments of the European Judo Union (EJU) in 2005–2020. The EJU medical questionnaire was utilized to gather information from each injured athlete according to the aforementioned inclusion criteria. Results: Several statistically significant relationships were found between the differences in the number of injuries between particular combat phases and the athlete’s sex. Conclusions: A significantly higher number of injuries occurred during the combined second half and the last minute of the judo combat. Males suffered more injuries during the first and second half of the combat compared to females, however, during the last minute of the combat, the number of injuries was greater among women. Full article

Background: The purpose of this study was to compare the effects of resistance training on stable versus unstable surfaces on strength performance in young judokas. Methods: The study included 18 young judokas (age: 13.2 ± 1.2 years) with 4.7 years of training experience assigned to either the URT (unstable resistance training) group or the STG (stable resistance training) group. Both groups performed the bench press and squat exercise for 12 weeks (3 sessions/week, 30–40 min each), with one group performing on the stable surface and the other on the unstable surface. The tests included the 1RM bench press and squat, maximal power output during bench press and squat (Pmax), abdominal strength test (AB60), and the standing long jump (SLJ). Results: Statistical analyses revealed a group × time interaction for AB60 (p < 0.02) in favor of the URT group. Significant main effects of time (p < 0.01) for the 1RM bench press, 1RM squat, bench press power, AB60, and SLJ were found. There were no significant effects for squat maximal power in both groups (p ˃ 0.05). Conclusions: Both unstable and stable resistance training effectively improved maximal strength and performance in adolescent judokas, with unstable training offering additional benefits in abdominal strength. Full article

The objective of this study is to evaluate the impact of EEG biofeedback training under normoxic and normobaric hypoxic conditions on both simple and complex reaction times in judo athletes, and to identify the optimal training frequency and environmental conditions that substantially enhance reaction times in the examined athlete groups. The study comprised 20 male judo athlete members of the Polish national judo team in the middleweight and heavyweight categories. We randomly assigned participants to an experimental group and a control group. We conducted the research over four cycles, varying the frequency of EEG biofeedback sessions and environmental circumstances for both the experimental and control groups. Every research cycle had 15 training sessions. The results showed that the experimental group, following the theta/beta regimen, got significantly faster at complex reactions after a training cycle that included sessions every other day at normal oxygen levels. Following daily training sessions in normoxic circumstances, we noted enhancements in simple reaction speeds. Under normobaric hypoxia conditions, the judo athletes showed deterioration in both simple and complex reaction times. The control group showed no similar changes. Daily EEG training in normoxic settings markedly improved simple reaction time, but EEG-BF training conducted every other day greatly raised complicated reaction time. In contrast, training under normobaric hypoxia settings did not result in enhancements in basic or complicated reaction times following EEG training. Full article