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    A Bibliometric Analysis on Machine Learning in Sports Studies From 1999 to 2021
    (2023) Çobanoğlu, Halil Orbay; Akdağ, Eren; Kurtuluş, Muhammed Akif
    Objective: The aim of the research is to make a biblio- metric analysis of articles published using machine learning-sports key concepts. For this purpose, 654 studies published in the sources scanned in the Web of Science Core Collection database between 1999-2021 will be examined bibliometrically and the trend in the last 23 years will be revealed. Material and Methods: The database was searched using the keywords “machine learning” and “sports” and the number of stud- ies for years, the average number of citations per year, the journals and authors that published the most on this subject, the citation burst values of the authors, the countries and cooperation status of the responsible authors, the most the cited articles, word cloud and word tree map and conceptual structures were examined under their sub-titles. Results: According to the results obtained, it can be said that the interest in the subject has increased after 2014. The journal in which the articles on this subject were published the most was “Sensors”, and it was deter- mined that Musa RM was the author who wrote the most articles. The most cited work was written by Li and Wu in 2010.Conclusion: In the articles written, it has been determined that Australia and the United Kingdom are the countries most open to cooperation, and the most used concepts in the keyword and title section are “performance” and “learn- ing”. It is believed that the results obtained will shed light on re- searchers who want to conduct research on this subject.
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    Öğe
    Associations between differing magnitudes of inter-limb asymmetry and linear and change of direction speed performance in male youth soccer players
    (2022) Işın, Ali; Akdağ, Eren; Özdoğan, Emel Çetin; Bishop, Chris
    Study aim: This study examines the relationship between different magnitudes of asymmetry and their effects on speed performance. Material and methods: Forty-two sub-elite male youth soccer players performed a 30-m sprint, change of direction, single leg countermovement jump and single leg hop. Subjects were divided into groups with vertical and horizontal asymmetry, and both groups were then divided into three groups according to magnitudes of inter-limb asymmetry (<5%, 5–10%, and >10%). Results: The results showed no significant correlation between different jump asymmetry magnitudes and the mentioned outcomes of speed performance (p > 0.05). In addition, larger asymmetries resulted in faster linear speed, even if small differences (g range = 0.00 to 0.57; p > 0.05). But this was not similar for change of direction speed (g range = –0.42 to 0.34; p > 0.05). Conclusions: There are inconsistent findings for the effects of inter-limb asymmetries on speed performance. The results of the present study indicate that the magnitude of asymmetry had no meaningful association with independent measures of performance in soccer players. Therefore, it seems more likely to explain the effects of individual asymmetries on performance rather than the idea that asymmetry negatively affects performance.