Browsing by Author "Kons R.L."

Now showing 1 - 3 of 3

Acute Dehydration Impairs Performance and Physiological Responses in Highly Trained Judo Athletes
(2022-06-01) Ceylan B.; Kons R.L.; Detanico D.; Šimenko J.
Background: The present study investigated highly trained male judo athletes and how a 5% body mass dehydration affects their judo-specific performance and physiological responses. Meth-ods: Nine highly trained international-level male judo athletes who are weight-cyclers voluntarily participated in the study. The study had a controlled crossover design in nature. Athletes com-pleted three sessions, including a familiarisation session and two experimental sessions (dehydration (DEHY) and control (CON)) with judo-specific tests, including maximal handgrip strength test (HGS), judogi grip strength tests (JGST), and the Special Judo Fitness Test (SJFT). Results: Intergroup analysis revealed a significant increase in urine specific gravity (USG) and decreased body mass following DEHY condition compared to CON. Furthermore, significant decreases were determined in HGS, JGSTs, and a number of throws in the first and third series of SJFTs, as well as higher heart rate (HR) responses in the second and third series of SJFT and worse SJFT index in DEHY condition (p < 0.05). Conclusions: We concluded that 5% dehydration of body mass led to impairment in dynamic and isometric strength in upper limbs and in judo-specific performance, as well as elevated HR during the SJFT.
Analysis of video review during official judo matches: effects on referee’s decision and match results
(2021-01-01) Kons R.L.; Saldanha Da Silva Athayde M.; Ceylan B.; Franchini E.; Detanico D.
This study aimed to describe the frequency of video review (VR) used during international judo matches. The duration and time of VR occurrence and the effect of VR on subsequent referee’s decisions and match outcomes were investigated. Video recordings from the matches in which the VR was used in the 2020 Grand Slams (n = 122) were analysed. The main results showed most VR occurrences were from 1 to 2 min for female athletes (p = 0.03). Lightweight categories in both male and female groups showed the highest frequency of VR (37.3%). No significant differences were detected for VR duration and time when VR occurred considering sex and weight categories (p = 0.91, p = 0.26, respectively). A significant association was found between the type of action and the referee’s decision (p < 0.01), being score assignment the most frequent action (77.6% of male and 64.8% of female). More than 80% of the athletes (82.3% male and 78.3% female) won their matches after referees’ checking. We concluded that VR is often used at the beginning of the match mainly in the female group, mostly concerning scoring attribution, which directly affected the match result in more than 80% of the cases.
The penalties and scores by events, to predict victory and defeat according to when the contest ends in elite judo contests
(2024-07-15) Dopico-Calvo X.; Santos L.; Mayo X.; Carballeira E.; Clavel I.; Ceylan B.; Kons R.L.; Iglesias-Soler E.