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Paper Abstract and Keywords
Presentation 2020-10-29 17:35
Effort-dependent emergence of uniform and diverse muscle activity features in skilled pitching
Tsubasa Hashimoto, Ken Takiyama (TUAT), Takeshi Miki, Hirohumi Kobayashi (UTokyo), Daiki Nasu (NTT), Tetsuya Ijiri, Masumi Kuwata (UTokyo), Makio Kashino (NTT), Kimitaka Nakazawa (UTokyo) NC2020-17
Abstract (in Japanese) (See Japanese page) 
(in English) Skilled pitchers show common and individually different motion features. In contrast, common and individually different motion features unclear how these features depend on motion effort. The current study investigates how motion effort affects common and individually different motion features in skilled motions. We measured electromyographic (EMG) activities in pitching motions at three effort levels (i.e., 50%, 80%, and 100% effort), or three levels of fastball velocity. Besides, by utilizing tensor decomposition and principal component analysis, we found two dimensions regarding the effort-dependence in skilled pitching. One dimension separates 50% from the higher effort, while another dimension separates 80% from 100% effort. In the dimension to separate 50% from the higher effort, there were consistent tendencies across the subjects. On the other hand, in the dimension to separate 80% from 100% effort, there were a few consistent tendencies. In sum, we found that the effort dependence of multiple time-varying EMG activity data can be discussed in two-dimensional space.
Keyword (in Japanese) (See Japanese page) 
(in English) Baseball pitching / Individual difference / EMG / Effort / Tensor decomposition / Spatial module / Temporal module /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 216, NC2020-17, pp. 44-49, Oct. 2020.
Paper # NC2020-17 
Date of Issue 2020-10-22 (NC) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
Copyright
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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)
Download PDF NC2020-17

Conference Information
Committee MBE NC NLP CAS  
Conference Date 2020-10-29 - 2020-10-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ME,NC,CAS,NLP 
Paper Information
Registration To NC 
Conference Code 2020-10-MBE-NC-NLP-CAS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effort-dependent emergence of uniform and diverse muscle activity features in skilled pitching 
Sub Title (in English)  
Keyword(1) Baseball pitching  
Keyword(2) Individual difference  
Keyword(3) EMG  
Keyword(4) Effort  
Keyword(5) Tensor decomposition  
Keyword(6) Spatial module  
Keyword(7) Temporal module  
Keyword(8)  
1st Author's Name Tsubasa Hashimoto  
1st Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
2nd Author's Name Ken Takiyama  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
3rd Author's Name Takeshi Miki  
3rd Author's Affiliation The University of Tokyo (UTokyo)
4th Author's Name Hirohumi Kobayashi  
4th Author's Affiliation The University of Tokyo (UTokyo)
5th Author's Name Daiki Nasu  
5th Author's Affiliation NTT Communication Science Laboratories (NTT)
6th Author's Name Tetsuya Ijiri  
6th Author's Affiliation The University of Tokyo (UTokyo)
7th Author's Name Masumi Kuwata  
7th Author's Affiliation The University of Tokyo (UTokyo)
8th Author's Name Makio Kashino  
8th Author's Affiliation NTT Communication Science Laboratories (NTT)
9th Author's Name Kimitaka Nakazawa  
9th Author's Affiliation The University of Tokyo (UTokyo)
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Speaker
Date Time 2020-10-29 17:35:00 
Presentation Time 25 
Registration for NC 
Paper # IEICE-NC2020-17 
Volume (vol) IEICE-120 
Number (no) no.216 
Page pp.44-49 
#Pages IEICE-6 
Date of Issue IEICE-NC-2020-10-22 


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