著者

坂井 純子 加藤 達郎 平岡 秀雄 斉藤 勝

出版者

東海大学体育学部

雑誌

東海大学紀要 体育学部 (ISSN:03892026)

巻号頁・発行日

no.11, pp.p61-70, 1981

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The purpose of this study was to investigate if a volleyball player could change the course of the spike by a signal given at various stage in spiking motion, and to find the differences of the spike form on these conditions. Conditions were to make a full swing spike toward a cross course and to change the spike course toward a straight course when signal was shown. All of spike motions were filmed and analyzed. Points of view for analyzing are following : a) Initial velocity of the ball. b) Maximum velocity of the finger. c) Body angle to the direction of running. d) Direction of spiking hand after striking the ball. Results of these experiments indicates that : 1) If the signal was switched on just before the beginning of the forward swing in spiking, all subjects could change the spike course on most occasions. On this study, "just before the beginning of the forward swing" meant about 0.30 to 0.35 seconds before the beginning of the forward swing. 2) Initial velocity of the ball, on the case when the signal was given just before the beginning of the forward swing, was later than ones on the another cases. 3) However, the finger velocity of this case was faster just before meeting to the ball. 4) There were no significant differences on the body angle to the direction of running jump at the various spike motions. 5) Directions of the arm after spiking the ball was decided depending on the course of the spike.

著者

大下 陽一 加藤 達郎 杉山 修一 鈴木 克巳

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.121, no.7, pp.818-821, 2001-07-01 (Released:2008-12-19)

参考文献数

14

著者

陸川 章 山田 洋 加藤 達郎 植村 隆志

出版者

東海大学

雑誌

東海大学紀要. 体育学部 (ISSN:03892026)

巻号頁・発行日

vol.35, pp.7-12, 2006-03-31

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The purpose of this study is to examine shot skill of free throw in male college basketball players. Subjects were two male college basketball players (subject A: good shot-skilled player, subject B: poor shot-skilled player). Their forms during shots of free throw were recorded by using a digital video camera. The displacement of ball and joint angle were calculated from obtained video data. The velocity of ball which are released was faster in subject A than in subject B. Behaviors of changes of joint angle in subject A were similar to subject B. However, from the point of view of the "motor conduction", the conduction was inferior in the subject B than in the subject A. These results suggest that differences in the "motor conduction" may affect shot skill of free throw in basketball, and kinematics data obtained from video camera are useful as the index of motor skills.