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Paper Abstract and Keywords
Presentation 2014-05-24 13:00
Analysis of the kinetic chain including the stretching of the chest in baseball pitching
Motoki Iwahazama, Toyohiko Hayashi (Niigata Univ.), Hiroshi Tanaka, Hiroki Ninomiya, Hiroaki Inui, Masahiko Komai, Katsuya Nobuhara (Nobuhara Hospital) MBE2014-4
Abstract (in Japanese) (See Japanese page) 
(in English) Baseball pitching is a coordinative movement of the lower limbs, the trunk and the upper limbs. If an appropriate coordination among them is accomplished, the motion energy of the upper limb is known to increase. Such phenomenon is called the kinetic chain. The trunk connecting the lower and upper limbs functions as a relay point in the kinetic chain. As one of the coaching terms of the trunk, the stretching of the chest is frequently used, but has been analyzed qualitatively. In order to achieve its quantitative analysis, we developed a novel parameter, denoted as S, in our previous study. In this study, we applied S into the analysis of pitching motion in order to scrutinize the kinetic chain from the lower limbs to the upper limb on the pitching side, including the stretching of the chest. The time-series analysis of the angular velocity of the body elements and the rate of the change of S suggested that the kinetic chain could occur in a sequence of the counter clockwise rotation of the chest, the shrink of the chest and the internal rotation of the shoulder.
Keyword (in Japanese) (See Japanese page) 
(in English) baseball pitching / the stretching of the chest / kinetic chain / motion capture / motion analysis / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 51, MBE2014-4, pp. 13-18, May 2014.
Paper # MBE2014-4 
Date of Issue 2014-05-17 (MBE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee MBE  
Conference Date 2014-05-24 - 2014-05-24 
Place (in Japanese) (See Japanese page) 
Place (in English) University of Toyama 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2014-05-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of the kinetic chain including the stretching of the chest in baseball pitching 
Sub Title (in English)  
Keyword(1) baseball pitching  
Keyword(2) the stretching of the chest  
Keyword(3) kinetic chain  
Keyword(4) motion capture  
Keyword(5) motion analysis  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Motoki Iwahazama  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Toyohiko Hayashi  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Hiroshi Tanaka  
3rd Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
4th Author's Name Hiroki Ninomiya  
4th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
5th Author's Name Hiroaki Inui  
5th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
6th Author's Name Masahiko Komai  
6th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
7th Author's Name Katsuya Nobuhara  
7th Author's Affiliation Nobuhara Hospital and Institute of Biomechanics (Nobuhara Hospital)
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Speaker Author-1 
Date Time 2014-05-24 13:00:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # MBE2014-4 
Volume (vol) vol.114 
Number (no) no.51 
Page pp.13-18 
#Pages 6 
Date of Issue 2014-05-17 (MBE) 

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