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Research in Dance and Physical Activity - Vol. 7 , No. 2

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[ Article ]
Research in Dance and Physical Education - Vol. 5, No. 3, pp. 19-36
ISSN: 2586-1034 (Online)
Print publication date 31 Dec 2021
Received 31 Oct 2021 Revised 10 Dec 2021 Accepted 20 Dec 2021
DOI: https://doi.org/10.26584/RDPE.2021.12.5.3.19
The Distinction of Anomalous Kicks in Taekwondo Using IMU Sensors
Jonghyun Yang¹ ; Kwang Yeon Kim² ; Won Jae Lee³^{, *}
1Incheon National University, Republic of Korea, Professor
2Kookmin University, Republic of Korea, Master's Student
3Kookmin University, Republic of Korea, Professor


Correspondence to : ^*Email address: wjlee@kookmin.ac.kr



Funding Information ▼ Ministry of Culture, Sports and Tourism Korea Sports Promotion Foundation

Abstract

The present study intends to find a way to distinguish an anomalous kick that appeared as a side effect of the introduction of the electronic Protector and Scoring System (PSS) in taekwondo through Inertial Measurement Unit (IMU) sensors. The 10 normal kicks and 1 anomalous kick were selected for the study. Four IMU sensors were attached to the trunk, pelvis, and both feet of each of 10 taekwondo athletes to obtain the total acceleration and total angular velocity of the right foot based on the trunk and the pelvis. Seven athletes were randomly selected to calculate the reference data of 11 types of kicks and the data were compared with the data of 11 kicks of the remaining three athletes through correlation analysis. The accuracy of distinguishing the anomalous kick through each variable was 83.3%, and the probability of misunderstanding a normal kick as an anomalous kick was 6.7%. When the results of the correlation analysis of the four variables were synthesized and analyzed, the accuracy of distinguishing anomalous kicks improved to 100%, and the ratio of cases of misunderstanding normal kicks as anomalous kicks decreased to 0%. The results of the present study provide a simple but reliable method to distinguish anomalous kicks in taekwondo competitions. If the limitations of the findings of the study are settled and introduced into the taekwondo EPSS, the problem of anomalous kicks in current taekwondo competitions can be solved.


Keywords: Taekwondo, Anomalous kick, Monkey kick, IMU sensor, PSS

Acknowledgments

This research was funded by the National Sports Promotion Fund from the Korea Sports Promotion Foundation under the sports industry technology development project of the Ministry of Culture, Sports and Tourism.

References


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2.	Cho, D., Lee, H., Lee, W., & Kang, S. (2021). Detecting Anomalous Kicks in Taekwondo with Spatial and Temporal Features. IEEE Access.
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Professor, California State University, San Bernardino, USA
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