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Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis

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...

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Autor principal: Nakata, Hiroki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5457367/
https://www.ncbi.nlm.nih.gov/pubmed/28577222
http://dx.doi.org/10.1186/s40798-017-0090-3
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author Nakata, Hiroki
author_facet Nakata, Hiroki
author_sort Nakata, Hiroki
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description 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.
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spelling pubmed-54573672017-06-16 Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis Nakata, Hiroki Sports Med Open Original Research Article 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. Springer International Publishing 2017-06-02 /pmc/articles/PMC5457367/ /pubmed/28577222 http://dx.doi.org/10.1186/s40798-017-0090-3 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Research Article
Nakata, Hiroki
Relationship Between the Relative Age Effect and Lengths of Professional Careers in Male Japanese Baseball Players: a Retrospective Analysis
title 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_short 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
topic Original Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5457367/
https://www.ncbi.nlm.nih.gov/pubmed/28577222
http://dx.doi.org/10.1186/s40798-017-0090-3
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