Document Detail

The Spin on Fastballs Thrown by Elite Baseball Pitchers.
MedLine Citation:
PMID:  21552157     Owner:  NLM     Status:  Publisher    
PURPOSE:: In this study, we analyzed the direction of the spin axis angles and the spin rate of baseballs pitched by elite collegiate and professional pitchers. METHODS:: The video image of a ball being pitched was taken from the period just before release until 200 ms after release with a high-speed video camera at a rate of 1000 frames per sec. A custom-made device was used to analyze the spin axis angle and spin rate. RESULTS & CONCLUSION:: There were no significant differences in the direction of the spin axis angles or the spin rate between collegiate and professional pitchers. A significant correlation was obtained between spin rate and ball speed; the higher the ball speed, the greater the spin rate. In addition, the spin rate deviated more across subjects than did ball speed. For all subjects, the azimuth and elevation of spin axis were 19 ± 14° and -32 ± 9°, respectively. Some of the pitchers were able to put a characteristic spin on their fastball; the nature of this spin could be related to their pitching success.
Tomoyuki Nagami; Jun Morohoshi; Takatoshi Higuchi; Hiroki Nakata; Shigeto Naito; Kazuyuki Kanosue
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-4
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1Graduate School of Sport Sciences, Waseda University; 2Research Fellow of the Japan Society for the Promotion of Science; 3Faculty of Sport Sciences, Waseda University; 4Yomiuri Giants.
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