壘球風車式投球不同擺臂技術之運動生物力學分析

王 令儀(Li-I Wang), 林 德嘉(Der-Chia Lin), 黃 長福(Chen-Fu Huang), 杜 惠萍(Hui-Ping Tu)

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to investigate the differences between two kinds of softball pitching techniques that involve pitching the arm backward. Two high skilled female fastpitch softball pitchers served as subjects. Two high-speed video cameras (120 frames/s) were synchronized to collect the arm motions during softball pitching. Angular momentum of the pitching arm was then calculated from these kinematic data and from the moment of inertia of the arm. The results indicated that the first-peak velocity (elbow: straight-arm backward style 5.95m/s>curve-arm backward style 5.19m/s; wrist: straight-arm backward style 9.38m/s> curve-arm backward style 5.88m/s), moment of inertia(left leg landing: straight-arm backward style 0.34kg*m2>curve-arm backward style 0.17kp*m2), and angular momentum (left leg landing: straight-arm backward style 3.92kg*m2/s>curve-arm backward style 0.17kg*m22.11kg*m2/s)were larger for the straight-arm backward style during the preparation stage and of the transmission stage. It is suggested that the pitchers need to have better muscle endurance for the straight-arm backward style. However, the pitchers must have more muscle power and coordination for the curve-arm backward style.
Original languageChinese
Pages (from-to)49-57
Number of pages9
Journal體育學報
Issue number35
DOIs
Publication statusPublished - 2003

Cite this

壘球風車式投球不同擺臂技術之運動生物力學分析. / 王令儀(Li-I Wang); 林德嘉(Der-Chia Lin); 黃長福(Chen-Fu Huang); 杜惠萍(Hui-Ping Tu).

In: 體育學報, No. 35, 2003, p. 49-57.

Research output: Contribution to journalArticle

王令儀(Li-I Wang) ; 林德嘉(Der-Chia Lin) ; 黃長福(Chen-Fu Huang) ; 杜惠萍(Hui-Ping Tu). / 壘球風車式投球不同擺臂技術之運動生物力學分析. In: 體育學報. 2003 ; No. 35. pp. 49-57.
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abstract = "The purpose of this study was to investigate the differences between two kinds of softball pitching techniques that involve pitching the arm backward. Two high skilled female fastpitch softball pitchers served as subjects. Two high-speed video cameras (120 frames/s) were synchronized to collect the arm motions during softball pitching. Angular momentum of the pitching arm was then calculated from these kinematic data and from the moment of inertia of the arm. The results indicated that the first-peak velocity (elbow: straight-arm backward style 5.95m/s>curve-arm backward style 5.19m/s; wrist: straight-arm backward style 9.38m/s> curve-arm backward style 5.88m/s), moment of inertia(left leg landing: straight-arm backward style 0.34kg*m2>curve-arm backward style 0.17kp*m2), and angular momentum (left leg landing: straight-arm backward style 3.92kg*m2/s>curve-arm backward style 0.17kg*m22.11kg*m2/s)were larger for the straight-arm backward style during the preparation stage and of the transmission stage. It is suggested that the pitchers need to have better muscle endurance for the straight-arm backward style. However, the pitchers must have more muscle power and coordination for the curve-arm backward style.",
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author = "王, {令儀(Li-I Wang)} and 林, {德嘉(Der-Chia Lin)} and 黃, {長福(Chen-Fu Huang)} and 杜, {惠萍(Hui-Ping Tu)}",
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AU - 林, 德嘉(Der-Chia Lin)

AU - 黃, 長福(Chen-Fu Huang)

AU - 杜, 惠萍(Hui-Ping Tu)

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N2 - The purpose of this study was to investigate the differences between two kinds of softball pitching techniques that involve pitching the arm backward. Two high skilled female fastpitch softball pitchers served as subjects. Two high-speed video cameras (120 frames/s) were synchronized to collect the arm motions during softball pitching. Angular momentum of the pitching arm was then calculated from these kinematic data and from the moment of inertia of the arm. The results indicated that the first-peak velocity (elbow: straight-arm backward style 5.95m/s>curve-arm backward style 5.19m/s; wrist: straight-arm backward style 9.38m/s> curve-arm backward style 5.88m/s), moment of inertia(left leg landing: straight-arm backward style 0.34kg*m2>curve-arm backward style 0.17kp*m2), and angular momentum (left leg landing: straight-arm backward style 3.92kg*m2/s>curve-arm backward style 0.17kg*m22.11kg*m2/s)were larger for the straight-arm backward style during the preparation stage and of the transmission stage. It is suggested that the pitchers need to have better muscle endurance for the straight-arm backward style. However, the pitchers must have more muscle power and coordination for the curve-arm backward style.

AB - The purpose of this study was to investigate the differences between two kinds of softball pitching techniques that involve pitching the arm backward. Two high skilled female fastpitch softball pitchers served as subjects. Two high-speed video cameras (120 frames/s) were synchronized to collect the arm motions during softball pitching. Angular momentum of the pitching arm was then calculated from these kinematic data and from the moment of inertia of the arm. The results indicated that the first-peak velocity (elbow: straight-arm backward style 5.95m/s>curve-arm backward style 5.19m/s; wrist: straight-arm backward style 9.38m/s> curve-arm backward style 5.88m/s), moment of inertia(left leg landing: straight-arm backward style 0.34kg*m2>curve-arm backward style 0.17kp*m2), and angular momentum (left leg landing: straight-arm backward style 3.92kg*m2/s>curve-arm backward style 0.17kg*m22.11kg*m2/s)were larger for the straight-arm backward style during the preparation stage and of the transmission stage. It is suggested that the pitchers need to have better muscle endurance for the straight-arm backward style. However, the pitchers must have more muscle power and coordination for the curve-arm backward style.

KW - 壘球

KW - 直臂式後擺投球

KW - 屈肘式後擺投球

KW - 運動生物力學

KW - softball

KW - straight-arm backward pitch

KW - curve-arm backward pitch

KW - biomechanics

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