Using digital technologies in refereeing to correctly identify the winner in judo competitions

Purpose: to analyze the impact of the use of digital technology in judging to correctly identify the winner in judo competitions. Material and methods. The following methods were used during the research: theoretical analysis and generalization of literature sources and data of the Internet, analysis of video recording, methods of mathematical statistics. Results: based on the recordings of 42 fights of the final block of the European Championship and the Ukrainian Junior Judo Championship on video hosting (You Tube), the analysis of the impact of video replays on the referee's decision was conducted to correctly identify the winner in the competition. In 22 bouts of the European Championship and in 24 bouts of the Ukrainian Championship, the referees made decisions that did not require revision or change. In the other 20 fights of the European Championship and in 18 fights of the Ukrainian Championship, video replays were used. A comparison of the average rates of fights in which digital replays were used or not used with the help of digital technologies showed a statistically significant difference in the performance of refereeing at the European Championship and the Ukrainian Judo Championship among juniors (<0,05). Since t (0,051) < tgr (1,98) the analysis of the refereeing of the European Championship and the Ukrainian Junior Judo Championship can be considered statistically significant. As a percentage of the total number of 42 fights, of which 20 fights – 47,6 % of international judges use video replays and 22 fights – 52,3 % of international judges did not use video replays. Analyzing the championship of Ukraine with a total of 42 fights, of which 18 fights – 42,8 % of judges use video replays and 24 fights – 57,1 % of judges did not use video replays. Conclusions. Analysis of existing digital technologies used in judo refereeing has revealed a set of programs that assist in the competition. The use of digital technologies provides an opportunity to improve the quality of refereeing at various ranks of the competition. The percentage of using video views and the percentage without video views at the European Championship and the Ukrainian Championship is almost the same. This speaks to the quality of judging at these events. This is because the refereeing of the final block allows more qualified judges who did not make mistakes during the refereeing or these mistakes were minimal. Keywords: judo, digital technologies, video replays, YouTube, European Championship, Ukrainian Championship, judges.