Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis
Abstract Background The mechanisms underlying the relative age effect in sport events have been investigated for more than two decades. The present study focused on the relationship between the relative age effect and lengths of professional careers among professional male Japanese baseball players....
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Online Access: | http://link.springer.com/article/10.1186/s40798-017-0090-3 |
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doaj-4bec6abd636b4c0ea96f998294000f242020-11-25T00:21:25ZengSpringerOpenSports Medicine - Open2199-11702198-97612017-06-01311510.1186/s40798-017-0090-3Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective AnalysisHiroki Nakata0Department of Health Sciences, Faculty of Human Life and Environment, Nara Women’s UniversityAbstract Background The mechanisms underlying the relative age effect in sport events have been investigated for more than two decades. The present study focused on the relationship between the relative age effect and lengths of professional careers among professional male Japanese baseball players. Methods The birth dates of players and lengths of professional careers were collected from an official publication, and data were divided into four quarters (Q1: April–June; Q2: July–September; Q3: October–December; Q4: January–March of the following year) grouped by 3 years. Based on the data for Q4, the expected numbers for the lengths of professional careers were calculated for Q1, Q2, and Q3. Results The number of players with professional careers of more than 19 years was significantly smaller in Q4 than in Q1, Q2, and Q3. Conclusions The relative age effect among professional male Japanese baseball players was associated with the lengths of professional careers. Relative age appears to be a very important factor for the development of expertise among male Japanese baseball players and involves long-term disadvantages after becoming professional players.http://link.springer.com/article/10.1186/s40798-017-0090-3RAEBaseballJapanRelative age effect |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hiroki Nakata |
spellingShingle |
Hiroki Nakata Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis Sports Medicine - Open RAE Baseball Japan Relative age effect |
author_facet |
Hiroki Nakata |
author_sort |
Hiroki Nakata |
title |
Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis |
title_short |
Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis |
title_full |
Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis |
title_fullStr |
Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis |
title_full_unstemmed |
Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis |
title_sort |
relationship between the relative age effect and lengths of professional careers in male japanese baseball players: a retrospective analysis |
publisher |
SpringerOpen |
series |
Sports Medicine - Open |
issn |
2199-1170 2198-9761 |
publishDate |
2017-06-01 |
description |
Abstract Background The mechanisms underlying the relative age effect in sport events have been investigated for more than two decades. The present study focused on the relationship between the relative age effect and lengths of professional careers among professional male Japanese baseball players. Methods The birth dates of players and lengths of professional careers were collected from an official publication, and data were divided into four quarters (Q1: April–June; Q2: July–September; Q3: October–December; Q4: January–March of the following year) grouped by 3 years. Based on the data for Q4, the expected numbers for the lengths of professional careers were calculated for Q1, Q2, and Q3. Results The number of players with professional careers of more than 19 years was significantly smaller in Q4 than in Q1, Q2, and Q3. Conclusions The relative age effect among professional male Japanese baseball players was associated with the lengths of professional careers. Relative age appears to be a very important factor for the development of expertise among male Japanese baseball players and involves long-term disadvantages after becoming professional players. |
topic |
RAE Baseball Japan Relative age effect |
url |
http://link.springer.com/article/10.1186/s40798-017-0090-3 |
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