著者

加賀 勝 細谷 聡

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.26, no.3, pp.25-30, 1994-03-30 (Released:2012-11-27)

参考文献数

18

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The purpose of this study was to clear mechanical characteristics of the Japanese bow, and find the energy transfer efficiency. The exeperiments were made by five classes of bows, arrows and strings heights. The potential energy(PE)was calculated on every bows.And the kinetic energy (KE)was calculated from shooting experiment according to arrows and strings heights.Then, the energy transfer efficiency was obtained on KE/PE X 100.The results were as follows:1, Relation between the drawing length and the drawing force shows a inverted S curve. This characteristic is constant regardless of the bow's strength and strings height.2, The potential energy is increased by the drawing length. The general tendency that the strong bow has high potential energy was evident.3, The minimum of the energy transfer efficiency lies on 15cm of the strings height in the experiment according to five classes strings height.4, In this study, the energy transfer efficiency is increased until 29g of the mass of arrow. And more than that, the energy transfer efficiency was decreased. It seems that there is a matching point of bow and arrow.

著者

高橋 佳伸 川崎 眞二 加賀 勝

出版者

社団法人日本体育学会

雑誌

日本体育学会大会号

巻号頁・発行日

no.47, 1996-08-25

著者

加賀 勝

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.20, no.2, pp.181-182, 1987-11-30 (Released:2012-11-27)

参考文献数

3

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

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

加賀 勝 小林 一敏 宮地 力

出版者

一般社団法人 日本体育学会

雑誌

日本体育学会大会号

巻号頁・発行日

vol.39, 1988

著者

細谷 聡 加賀 勝

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.35, no.2, pp.11-18, 2002-11-30 (Released:2012-11-27)

参考文献数

12

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Since a Japanese-style bow is very complicated in both shape and structure, torques in horizontal and sagittal planes regarding grip must be applied to hit the target. This study biomechanically investigated the relationship between left forearm muscular activities and torques in horizontal (called the “NEJIRI” technique) and sagittal planes (called the “UWAOSHI” technique)regarding grip.Surface EMGs of four muscles (extensor carpi radialis longus, extensor digitorum, extensor carpi ulnaris, flexor carpi ulnaris) were collected from ten male subjects shooting arrows. The habit of the motion of drawing the bows that is called “BIKU” was measured incidentally from the experiment. As a result of statistics analysis, extensor digitorum and extensor carpi ulnaris muscles had positive relationships to the torque in the horizontal plane (“NEJIRI” technique). On the other hand, extensor carpi ulnaris and flexor carpi ulnaris muscles had positive relationships to the torque in the sagittal plane (“UWAOSHI” technique). It is suggested that extensor carpi ulnaris is complicatedly controlled to accomplish the operation of “TENOUCHI”, the shooting technique, in KYUDO.

著者

加賀 勝

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.19, no.2, pp.45-46, 1986 (Released:2012-11-27)

参考文献数

6

著者

山田 奨治 加賀 勝 森 俊男

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.21, no.2, pp.61-62, 1988-11-30 (Released:2012-11-27)

著者

三宅 聡史 加賀 勝

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.36, no.2, pp.51-58, 2003-11-30 (Released:2012-11-27)

参考文献数

10

被引用文献数

2

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The purpose of this study was to determine characteristic of the “men” striking motion performed by top kendo athletes by comparing to lower level collegiate kendo athletes.It became clear as a result of analyzing the data that men striking motion is divided into two phases: Back-swing (first phase) and Forward-swing (second phase).1. Top kendo athletes extended both shoulders and wrists, and maintained the angle of the body bending forward more than collegiate athletes.2. There was no difference in the Shinai velocity or horizontal velocity of the center of gravity of the body between top kendo athletes and collegiate athletes.3. Flexion velocity of the left wrist in the first phase and extension velocity of the right wrist and both shoulders in the second phase of top kendo players were faster than collegiate kendo athletes.4. In the first phase, top kendo athletes raised both wrists more rapidly than collegiate athletes, after the left wrist moved to the bottom.5. Collegiate athletes moved the wrist to the top and the right wrist moved forward at the last stage of the second phase.6. Top kendo athletes extended the left shoulder more than collegiate athletes in the second phase.7. Horizontal velocity of the right ankle of collegiate athletes decreased in the last stage to the first phase.

著者

國本 あゆみ 菊永 茂司 岡崎 勘造 天野 勝弘 佐川 和則 新宅 幸憲 積山 敬経 井上 裕美子 成山 公一 山崎 先也 岡本 啓 石井 信子 田子 孝仁 土岡 大介 福田 隆 林 恭輔 小倉 俊郎 東條 光彦 三村 由香里 松枝 睦美 上村 弘子 津島 愛子 加賀 勝 酒向 治子 土井 真由 鈴木 久雄

出版者

日本健康教育学会

雑誌

日本健康教育学会誌 (ISSN:13402560)

巻号頁・発行日

vol.25, no.2, pp.74-84, 2017 (Released:2017-05-31)

参考文献数

35

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目的:本研究は大学生男女個々および交互,相互におけるBMIと体型不満の関連について検討することを目的とした.方法:対象は全国14大学に在籍する18-22歳の男性学生4,118名,女性学生2,677名であり,体組成測定およびボディーイメージに関する質問紙調査を用いた横断研究を行った.体組成は健康診断の結果もしくは実測した.結果:対象の平均(SD)BMIは男性21.7(3.3)kg/m2,女性は20.9(2.7)kg/m2であった.BMIが18.5未満の者の割合は男性11.1%,女性14.6%であり,BMIが18.5-24.9の範囲の者の割合は男性76.1%,女性78.9%であった.BMIに対する理想不満度(理想のシルエット-現在のシルエット)と健康不満度(健康的なシルエット-現在のシルエット)の間に男性は交互作用が認められなかったけれども,女性では有意な差が認められた(p<0.001).魅力的な男性のシルエット値は,男女間に有意な差はみられなかった(t=1.231,p=0.218,d=0.04).一方,男性からみた魅力的な女性のシルエット値は平均4.65,女性が思う男性からみた魅力的な女性のシルエット値は平均3.97であり,女性は男性に比べ有意に低い値を示した(t=25.08,p<0.001,d=0.70).結論:女性大学生の考える健康的な体型は理想体型より太い体型であった.魅力的な男性のシルエットは男女間に差がみられなかった.しかしながら,魅力的な女性のシルエットは男性より女性においてより細い体型と考えていることが示唆された.

著者

高橋 佳伸 川崎 眞二 加賀 勝

出版者

一般社団法人 日本体育学会

雑誌

日本体育学会大会号 第47回(1996) (ISSN:24330183)

巻号頁・発行日

pp.375, 1996-08-25 (Released:2017-08-25)

著者

加賀 勝 平田 和子 高橋 香代 清野 佳紀

雑誌

日本小児科学会雑誌 (ISSN:00016543)

巻号頁・発行日

vol.106, no.5, pp.655-664, 2002-05-01

参考文献数

19

被引用文献数

5

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

渡部 昌史 加賀 勝 鈴木 久雄 高橋 香代

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.23, no.2, pp.113-122, 2003-12-31 (Released:2010-08-10)

参考文献数

36

被引用文献数

1

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The objective of this study was to clarify the influences of sports activity in junior high-school athletes on bone strength and fractures. The subjects were 57 male junior high-school athletes aged from 13 to 15 years. They trained 120min, 6 times /wk. As an index of the bone strength, we measured the speed of sound of tibia (t-SOS) using Sound Scan 2000 Compact (Myriad Ultrasound System Ltd., Israel). The fracture rate was compared between the junior high-school athlete and control groups. The following results were obtained.(1) In the junior high-school athlete group, their t-SOS was significantly lower than control group.(2) The value of t-SOS demonstrated a negative correlation with the length of tibia/height ratio in the junior high-school athlete and control groups.(3) The value of t-SOS demonstrated a positive correlation with calcium intake from dairy products in the junior high-school athletes.(4) The junior high-school athletes showed a very high fracture rate. Particularly, the highest fracture rate (26.7%) was seen in the 13-year-old in the junior high-school athletes.These data will be useful for designing appropriate exercise programs to support the growth and bone mineral acquisition in the junior high-school athletes.

著者

加賀 勝 小林 一敏

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.18, no.2, pp.49-50, 1985

著者

加賀 勝 森 俊男 山田 奨治

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.21, no.2, pp.63-64, 1988-11-30 (Released:2012-11-27)

著者

中田 朝子 森 俊男 関根 令夫 加賀 勝

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.22, no.2, pp.21-22, 1989-11-30 (Released:2012-11-27)