著者

三宅 恵介 松井 崇 佐藤 武尊 横山 喬之 竹澤 稔裕 川端 健司 秋本 啓之

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.47, no.1, pp.19-27, 2014

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The All-Japan Judo Championships (AJJC) is an open-weight tournament for determining the best judoka in Japan. The AJJC has been held under the Kodokan Judo Refereeing Rules (KDK Rules) since 1951. In 2011, the All-Japan Judo Federation (AJJF) introduced the International Judo Federation Refereeing Rules (IJF Rules), which were formulated to facilitate more dynamic judo (increased wins by <i>ippon</i>, decreased wins by judges' decisions, and decreased <i>mate</i>-time). Although the IJF Rules has facilitated dynamic judo in international competitions, their effects on the competition contents in the AJJC are still unknown. Here, we aimed to clarify whether the introduction of the IJF Rules facilitated dynamic judo in the AJJC.<BR>The 221 judo matches in the AJJC from 2008 to 2013 were separated into two groups, the tournaments following the KDK Rules (2008-2010) and those following the IJF Rules (2011-2013). Their data were extracted from the AJJC records by<i> Judo</i>, the official Kodokan journal, and from the match videos recorded by the AJJF. We analyzed the proportions of winning contents (wins by <i>ippon</i> or superior performance), winning methods (points from techniques or penalties, or judges' decisions), techniques for getting points (<i>te-waza, koshi-waza, ashi-waza, sutemi-waza, </i>or<i> katame-waza</i>) and the <i>mate</i>-time for each match. A chi-square test and an independent <i>t</i>-test were used to perform statistical analyses, and for each test, statistical significance was assumed at <i>P</i> value < 0.05.<BR>For the winning methods of the IJF Rules' and the KDK Rules' tournaments, the proportion of points from techniques (60.4% vs. 53.6%) and points from penalties (23.4% vs. 15.5%) showed no differences, but the proportion of wins by judges' decisions in the IJF Rules' tournaments was significantly lower than in the KDK Rules' tournaments (16.2% vs. 30.9%) (P < 0.05). Furthermore, the <i>mate</i>-time in the IJF Rules' tournaments was significantly shorter than in the KDK Rules' tournaments (77 s vs. 105 s) (P < 0.01). However, the winning contents and techniques for obtaining points showed no differences between the IJF Rules' and the KDK Rules' tournaments.<BR>We confirmed for the first time that the IJF Rules did not affect the winning contents and techniques for getting points, but decreased the proportion of judges' decisions and <i>mate</i>-time in the AJJC. These findings suggest that the IJF Rules partially facilitated dynamic judo in the AJJC.

著者

竹澤 稔裕 横澤 司郎 若井 勝則

出版者

学校法人 関東学園大学

雑誌

関東学園大学紀要 Liberal Arts (ISSN:21878501)

巻号頁・発行日

vol.27, pp.11-24, 2018 (Released:2018-03-30)

参考文献数

6

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Oxygen capsules and hyperbaric oxygen therapy, which have been used to recover physical function, are currently being examined as physical training devices. The levels of dissolved oxygen in blood are increased in hyperbaric hypoxic conditions; thus, high-intensity training is most likely possible in training at a moderate power output, which requires oxygen. The present study compared biological responses and performance during exertion of moderate power in a standard environment and under hyperbaric hypoxic conditions. The exercise task was performed in accordance with the measurement protocol function for moderate power training of the Konami Power Max upright exercise bike. Data were analyzed using the paired t test and two-way analysis of variance, with the level of statistical significance set at a p value of <0.05. Significant differences were observed in the mean moderate power values for the second and third sets, and in peak power value for the third set. In addition, interactions were observed in the changes in the mean moderate power values for each set in both environments. However, interactions were not observed for mean peak power values in any set in either environment.

著者

三宅 恵介 竹澤 稔裕 伊藤 潔 佐藤 伸一郎 廣瀬 伸良

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.54, no.2, pp.103-113, 2022-03-31 (Released:2022-04-07)

参考文献数

36

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The purpose of this study was to clarify the tactical actions of nage-waza that are effective in scoring in judo by using a notational match performance analysis, and to provide useful knowledge in the practical field of coaching. For this purpose, we examined the relationship between (1) the type of nage-waza, (2) whether there was a renraku-henka in the nage-waza, and (3) the combination of the tori and the uke’s kumite and whether an athlete scored any points. Data from a total of 441 matches in the −60kg, −81kg, and +100kg weight classes in international competitions held in 2020 were used.The tactical actions associated with whether points were scored or not were the type of nage-waza and whether they included a renraku-henka. The combination of tactical actions that influenced the points scored was a combination of henka-waza and te-waza, and in some weight classes, combinations of henka-waza and other techniques were also effective. The combination of henka-waza and sumi-otoshi, which is classified as a te-waza, showed the highest scoring ratio in all weight classes.This study suggests for the first time that henka-waza, especially sumi-otoshi, applied during or after the opponent’s attack, is an effective tactical action for scoring regardless of weight class. These new findings indicate that in current judo competitions it is important to not only pursue single techniques but to construct tactical actions relative to the opponent. They are also expected to be useful for specific guidance in coaching.

著者

小野 卓志 小林 優希 岡田 弘隆 横山 喬之 石川 美久 竹澤 稔裕 増地 克之

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, pp.S_108, 2016

著者

崔 玉芬 久永 哲雄 竹澤 稔裕

出版者

学校法人 関東学園大学

雑誌

関東学園大学紀要 Liberal Arts (ISSN:21878501)

巻号頁・発行日

vol.25, pp.1-14, 2017 (Released:2017-04-20)

参考文献数

21

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The purpose of this study is to investigate the association of the present situation of university students' mental health with “friendship”, “sleep pattern” and “studies”. We conducted a questionnaire survey among 223 university students. Firstly, we examined mental health, grade and gender, engaging in extracurricular activity, living independently or not, and breakfast routine. The result was, there was no significant difference in grade, gender, extracurricular activity, and Breakfast taking. In addition, this study found that students living alone have significantly higher “Depression-Anxiety” stress response than those who do not live alone. Secondly, “friendship”, “sleep pattern” and “studies” Were examined to clarify the relationship with university student's mental health. The result concluded that, “friendship” had a negative influence on stress response concerning the aspect of “Depression-Anxiety”, “Irritability-Anger” and “Helplessness”.