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Accession number;05A0025446
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| Title;Multi-joint dynamical model of throwing arm in baseball pitch |
| Author;
NAITO KOZO
(Tokyo Inst. of Technology, Graduate School)
MARUYAMA TAKEO
(Tokyo Inst. of Technol.)
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Journal Title;Nihon Kikai Gakkai Supotsu Kogaku Shinpojiumu, Shinpojiumu Hyuman, Dainamikusu Koen Ronbunshu
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Journal Code:L1198A
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ISSN:
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VOL.2004;NO.;PAGE.117-121(2004)
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| Figure&Table&Reference;FIG.8, REF.10 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In this study, upper extremity of overhand throwing motion was modeled as the link segment system including three segments (humerus, forearm and hand) and 7 degrees of freedom of joint motions. Throwing motions of 3 subjects were filmed from 5 high-speed cameras and joint torques were calculated using the inverse dynamics. The relationships between the joint torques and the velocity of distal end point of upper extremity were analyzed. The results showed that shoulder internal rotation torque (IR) contributed greatly to production of ball velocity and shoulder horizontal adduction torque (HAD) contributed production of elbow velocity. Because of the interaction of IR and HAD, proximal to distal sequential motion of throwing arm was occurred. (author abst.) |
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