文献一覧: 武道学研究 (雑誌)

This study aimed to clarify the number of nage-waza (throwing techniques) acknowledgements and objections from inside and outside the triangle made by the referees in the conventional referee positions using the International Judo Federation Refereeing Rules. The findings of the study are as follows.1. Nage-waza acknowledgements were performed 200 times (47.4%) inside the triangle connecting the three referees with a straight line and 222 times (52.6%) outside the triangle, with no significant differences.2. No objections (3-0) were made 168 times (47.6%) inside the triangle connecting the three referees with a straight line and 185 times (52.4%) outside the triangle, with no significant differences.3. Objections (2-1, 1-2, 1-1-1) were made 32 times (46.4%) inside the triangle connecting the three referees with a straight line and 37 times (53.6%) outside the triangle, with no significant differences.4. Objections (2-1) were performed 15 times (48.4%) inside the triangle connecting the three referees with a straight line and 16 times (51.6%) outside the triangle, with no significant differences.5. Objections (1-2) were performed 16 times (44.4%) inside the triangle connecting the three referees with a straight line and 20 times (55.6%) outside the triangle, with no significant differences.6. Objections (1-1-1) were made once (50%) inside the triangle connecting the three referees with a straight line and once (50%) outside the triangle, with no significant difference.7. Inside the triangle connecting the three referees with a straight line, no objections (3-0) occurred 168 times (47.6%) and objections (2-1, 1-2, 1-1-1) occurred 32 times (46.4%). Outside the triangle connecting the three referees with a straight line, no objections (3-0) were made 185 times (52.4%) and objections (2-1, 1-2, 1-1-1) were used 37 times (53.6%). There were no significant differences in the percentages inside and outside the triangles, with and without objections.The above suggested that with conventional referee positions, it was desirable for nage-waza acknowledgements to be conducted inside the triangle and for assistant referees to move. However, it could not be concluded that there was a problem in the number of objections. In the future, in situations where the assistant referees cannot present an acknowledgement of nage-waza to the referee, it will be necessary to compare the number of occurrences of objections between the inside and outside of the triangle in the conventional referee positions.

2023-11-14 23:48:20
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1 0 0 0 OA 男子大学柔道トップアスリートにおけるミドルパワーとACTN3及びACE遺伝子多型との関連性

著者: 上水研一朗位髙駿夫廣川彰信有賀誠司町田修一
出版者: 日本武道学会
雑誌: 武道学研究 (ISSN:02879700)
巻号頁・発行日: vol.49, no.1, pp.29-38, 2016-08-18 (Released:2018-03-12)
参考文献数: 32

Previous studies have reported that the alpha-actinin-3 (ACTN3) and angiotensin-converting enzyme (ACE) gene polymorphisms are associated with sports performance, muscle strength, muscle power, and endurance. Competitive judo requires high levels of muscle power, muscle strength, and endurance. However, thus far, associations between these gene polymorphisms and muscle power in judo athletes have not been reported. The purpose of this study was to investigate the relationship between ACTN3 and/or ACE gene polymorphisms and middle power in judo athletes. This study recruited 79 male judo athletes from a top-level university in Japan. Genomic DNA was extracted from the saliva sample taken from each athlete. Genotyping using either polymerase chain reaction (PCR)-restriction fragment length polymorphism or PCR was performed to detect ACTN3 (rs1815739) and ACE (rs1799752) gene polymorphisms. Each athlete also performed a 30-s Wingate anaerobic test with a resistance equal to 4.5% of the athlete’s body weight.One-way analysis of variance revealed a significant difference in middle power relative to weight among the ACTN3 genotype groups (p<0.05). In other words, RX individuals showed significantly higher middle power than XX individuals (p<0.05). Moreover, middle power relative to weight was higher in individuals with the RR+RX genotype than in those with the XX genotype (p<0.05). However, there were no significant differences in the ACE genotype.The results of the present study suggest that ACTN3 but not ACE gene polymorphisms may be associated with middle power in judo athletes.