1. Social Physical Education, Sunchon National University, Sunchon 57922, Republic of Korea
2. Department of Taekwondo, Art, Design, & Physical Education, Chosun University, Gwangju 61452, Republic of Korea
3. Sports Medicine Major, College of Humanities and Arts, Korea National University of Transportation, Chungju-si 27469, Republic of Korea
4. Graduate School of Physical Education, Myongji University, Yongin 17058, Republic of Korea