著者

杉山 康司 吉田 和人 祝原 豊 河合 学 中野 偉夫

出版者

静岡大学教育学部

雑誌

静岡大学教育学部研究報告. 自然科学篇 (ISSN:02867311)

巻号頁・発行日

vol.49, pp.15-24, 1999-03-22

著者

吉田 和人 山田 耕司 玉城 将 内藤 久士 加賀 勝

出版者

Japan Society of Physical Education, Health and Sport Sciences

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.59, no.1, pp.227-236, 2014

被引用文献数

4

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The rotation speed of the ball spin has been considered a key factor in winning table tennis matches. This study quantified the rotation speed (rotations per second: rps) of service balls delivered by quarter-finalists in the 2009 World Table Tennis Championships. Ball services were recorded during the quarter-finals of both the men's and women's singles, involving 4 matches and 8 players per gender, using a high-speed video camera (1000 fps) for calculation of the rotation speed, and a standard video camera (30 fps) for distinguishing players and aces (including those touched by the receiver). Eventually, the rotation speeds of 329 services were calculated, and these ranged from 13.7 to 62.5 rps. For men, 50-60 rps was the most frequent (40.0%) range of the rotation speeds, while for women, the corresponding range was 40-50 rps (43.8%); the average (±SD) rotation speed was significantly greater for men than for women (46.0±9.0 vs. 39.2±9.3 rps, p<0.001). The fastest rotation speed was 62.5 rps for both genders. Chinese men produced a slower rotation speed than did other men (43.5±8.9 vs. 51.0±6.8 rps, p<0.001). For women, however, the rotation speed was similar between Chinese players and the others (39.9±10.2 vs. 38.5±8.2 rps). The rotation speeds of aces were scattered over a wide range of 37.0-58.8 rps for men and 27.8-62.5 rps for women, implying a weak association between aces and fast rotation. These pioneering data may help clarify some of the technical and tactical aspects of table tennis, and can be used to develop training and game strategies for successful performance.<br>

著者

楠堀 誠司 吉田 和人 関矢 寛史

出版者

県立広島大学

雑誌

基盤研究(C)

巻号頁・発行日

2010

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本研究では卓球のショットについて分析を行った.まず打球速度の分析を行い,最大速度で打球した場合にボールが卓球台を横切る時間は人間の全身反応時間の限界値(0.1sec)に相当することを見出した.また,無回転(the theoretical spin-free:TSF)ボールの理論的軌跡を算出し,ショット軌跡に対するボールスピンのはたらきを明らかにした.

著者

吉田 和人 山田 耕司 玉城 将 内藤 久士 加賀 勝

出版者

日本コーチング学会

雑誌

コーチング学研究 (ISSN:21851646)

巻号頁・発行日

vol.28, no.1, pp.65-74, 2014-11-20 (Released:2019-09-02)

参考文献数

16

被引用文献数

1

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A notational analysis of 12,428 rallies in 149 singles matches at the London Olympic Games was conducted to clarify the characteristics of world-class rallies in table tennis. The number of shots played per rally, which was the sum of a correct service and correct returns, was measured. And the winning ratios of server and receiver were determined by the number of shots played per rally (Odd numbers indicate the server won the point, even numbers indicate the receiver won the point). The playing styles of the players were classified into all-round types and defensive types (chopper type), and the types of matches were classified into 3 by the combination of playing styles as: all-rounder vs. all-rounder (AA type), all-rounder vs. defensive (AD type) and defensive vs. defensive (DD type). The numbers of shots and the two ratios, and relations to both gender and type of match were considered. The DD type was excluded from this analysis because there were too few measured data. As a result, the mode of the number of shots for men and women was 3 each. The maximums for men and women were 38 and 60, respectively. The minimum for men and women were 0 each. The mean number of shots for women was significantly larger than that for men for AD type (p<0.01), and that for AD type was significantly larger than that for AA type for both men (p<0.01) and women (p<0.001). The mean winning ratios for servers for both men and women for AA type and AD type were all at the same level at about 55%, which were significantly higher than those for receivers of about 45% (p<0.01). Additionally, the evaluation criteria for the mean number of shots in a match, and those for the winning ratios of a server and a receiver were proposed. It was suggested that these results could be valuable for table tennis coaching.

著者

葛西 順一 森 武 中野 昭一 油座 信男 飯本 雄二 吉田 和人 小林 一敏

出版者

早稲田大学

雑誌

早稲田大学人間科学研究 (ISSN:09160396)

巻号頁・発行日

vol.2, no.1, pp.41-48, 1989-03-25

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The purpose of his study was to investigate the speed and the accuracy of smash strokes of forehand in which conditions of various timing and hitting point in table tennis. Two male subjects participated in the world championships, and one of them participated in The 24th Soeul Olympic Games. The pictures of the action in hitting was recorded by a video cassette recorder while the reaction of three dimentional forces of forceplate and the wave of impact on the racket were synchronized on date recorder. The results obtained as followes. 1) The ball speed were between 17.6m sec. and 26.0m sec., and the accuracy were 69 % and 74 %. 2) Player with higher performance showed higher accuracy of smash strokes in front position trend to use his leg and arm more efficiently and sufficiently for make the distance the middle point of a circle of turning of trunk shorter. 3) Player with higher performance showed higher speed of smash strokes in middle position trend to use his leg and arm more efficiently and sufficiently for make the distance the middle point of a circle of turning of trunk longer. The results obtained were as follows. It was guessed that to control the distance the middle point of a circle of turning of trunk strongly influenced on the accuracy and the speed of ball smashed in front and middle position.

著者

吉田 和人 高間 康史

出版者

人工知能学会

雑誌

人工知能学会全国大会論文集 (ISSN:13479881)

巻号頁・発行日

vol.30, 2016

著者

吉田 和人 山田 耕司 玉城 将 池袋 晴彦 加賀 勝

出版者

日本スポーツ教育学会

雑誌

スポーツ教育学研究 (ISSN:09118845)

巻号頁・発行日

vol.34, no.1, pp.33-44, 2014-05-31 (Released:2014-09-29)

参考文献数

21

被引用文献数

1 1

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The purpose of this study was to clarify practical knowledge of improving service skills to increase competitiveness level of table tennis players using sport sciences. The practice of sport science support has been ongoing for three years, focusing on players from 13 years to 18 years who belonged to the Japanese Olympic Committee elite academy team. Two experiments per year were conducted. A high-speed camera (1000Hz) was used to measure the rotation speed of the service ball and two normal speed cameras (30Hz) were used to measure players’ movements. A meeting was held on the day after each experiment to discuss the results, during which each player, his/her coach, and staff who analyzed the experimental data clarified the technical challenges for the player. 9 male players and 7 female players participated at least once in both the experiments and the meetings during the 3-year period. The main results were as follows. 1) Range of rotation speed for the male players’ services was from 35.7rps to 83.3rps, and that of the female players’ services was from 16.4rps to 66.7rps. No-spin services were not included in these

著者

吉田 和人 山田 耕司 玉城 将 内藤 久士 加賀 勝

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

pp.13068, (Released:2014-04-21)

参考文献数

19

被引用文献数

6 4

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The rotation speed of the ball spin has been considered a key factor in winning table tennis matches. This study quantified the rotation speed (rotations per second, rps) of service balls delivered by quarter-finalists in the 2009 World Table Tennis Championships. Ball services were recorded during the quarter-finals of both the men's and women's singles, involving 4 matches and 8 players per gender, using a high-speed video camera (1000 fps) for calculation of the rotation speed, and a standard video camera (30 fps) for distinguishing players and aces (including those touched by the receiver). Eventually, the rotation speeds of 329 services were calculated, and these ranged from 13.7 to 62.5 rps. For men, 50-60 rps was the most frequent (40.0%) range of the rotation speeds, while for women, the corresponding range was 40-50 rps (43.8%); the average (±SD) rotation speed was significantly greater for men than for women (46.0±9.0 vs. 39.2±9.3 rps, p<0.001). The fastest rotation speed was 62.5 rps for both genders. Chinese men produced a slower rotation speed than did other men (43.5±8.9 vs. 51.0±6.8 rps, p<0.001). For women, however, the rotation speed was similar between Chinese players and the others (39.9±10.2 vs. 38.5±8.2 rps). The rotation speeds of aces were scattered over a wide range of 37.0-58.8 rps for men and 27.8-62.5 rps for women, implying a weak association between aces and fast rotation. These pioneering data may help clarify some of the technical and tactical aspects of table tennis, and can be used to develop training and game strategies for successful performance.

著者

吉田 和人 玉城 将 山田 耕司

出版者

社団法人日本体育学会

雑誌

日本体育学会大会予稿集

巻号頁・発行日

no.62, 2011-09-25

著者

吉田 和人 杉山 康司 村越 真

出版者

静岡大学

雑誌

基盤研究(C)

巻号頁・発行日

2006

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本研究では,卓球選手を対象に,スイングの回転半径の大小が異なる2つの打法(フォアハンドによるドライブ打法とフリック打法)における,打球直前の動作修正時のスイング様式を検討した.その結果,いずれの打法でも,イレギュラーバウンドにより打球までの時間が短くなった場合,遂行中のスイングの慣性モーメントを小さくするなどの動作修正がみられた.こうした素早い動作制御の検討では,動作の力学的特性に着目することが重要であると考えられた.

著者

吉田 和人 村越 真 杉山 康司

出版者

静岡大学

雑誌

基盤研究(C)

巻号頁・発行日

2003

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本研究の目的は,ボールの視覚情報による卓球一流選手の瞬時の動作修正における反応のメカニズムについて,実験的に検討することであった.卓球選手2名を対象に、フォアハンドによるフリック打法とドライブ打法における,上肢の筋活動、手関節の動き,および動作に関する内観を測定した.試技は,配球者から送られる4m/s程度のスピードの無回転のボールに対する強打とした.配球には,公式ボール(レギュラーバウンド条件)と,イレギュラーバウンドが発生しやすいように表面を凹凸に加工したボール(イレギュラーバウンド条件)を用いた,加工ボールの存在については,被験者に事前に告知しなかった.結果および考察は以下の通り.(1)レギュラーバウンド条件において,被験者コートでのボールバウンドからインパクトまでの平均時間は,フォアハンドフリック打法の場合,被験者Aが205ms,被験者Bが208ms,フォアハンドドライブ打法の場合,被験者Aが243ms,被験者Bが303msであった.(2)イレギュラーバウンド条件における,被験者コートでのボールバウンドからインパクトまでの時間や,動作に関する内観から,手関節を中心とした小さな動きが主なフォアハンドフリック打法は,肩関節を中心とした大きな動きが主なフォアハンドドライブ打法と比べ,短時間での動作修正に適していると考えられた.このことから,動作修正に要する時間は,動作の力学的特性と関連していると推察された.(3)イレギュラーバウンド条件において打球直前の動作修正が知覚された場面では,上肢骨格筋に動作修正への関与が推察される放電パターンの観察される試技と,観察されない試技とがみられた.この筋放電パターンの観察されない試技については,瞬時の動作修正における筋の作用機序のさらなる検討が必要であると考えられた.