## 5 Conclusions  
This study aims to provide baseline data to improve para athletics' athletic performance by identifying a change in disciplines in track events of para athletics over the last five Paralypric Games (2004-2020), analyzing record differences by level (podium and final groups) between men's and women's disciplines, and generating information on athletic performance trends. The data collection, processing, and analysis methods to achieve the study purpose are as follows: To check the changes in track events of para athletics in five Paralypric Games (Athens 2004 to Tokyo 2020) organized by the IPC, this study made a comparative analysis table after refining disciplines by the Paralypric Games depending on division (men's and women's) and class. By collecting the finals records of track disciplines carried out consecutively in the five Paralypric Games (2004-2020) by class in the men's and women'sdivisions, this study performed an analysis through a nonparametric statistical method, the Kruskal-Wallis Test. This study visualized and presented the game record trends through the analysis. The results drawn from this study are presented below: First, as a result of analyzing the change in disciplines in para athletics' track events disciplines showed a gradual decline. The number of track disciplines in the women's division was increased. Second, as a result of athletic performance difference analysis by class in the para athletic track events of each Paralympic Games (2004-2020): (1) significant differences were found in both the podium and final groups of men's 100 m-400 m-1500 m (four classes), 800 m (two classes), and 5000 m (one class); (2) statistically significant differences were revealed in the podium and final groups of women's 100 m (two classes), 200 m-400 m-800 m-1500 m-5000 m (one class) events. Third, as a result of analyzing the record change trends of the podium group by track event disciplines and a class of para athletics: (1) Records were improved in almost all classes in the men's division podium group's mean record change, and T35 class showed the biggest records improvement. In the 400 m event all classes showed improved records overall except for T11 whose records slightly worsened. Moreover, the podium group in the T52 class showed the biggest improvement in records, but in the men's 800 m (T53) records gradually worsened and improved from the Rio 2016. In the 1500 m T54 showed improved records in the podium group. (2) As a result of the women's podium group's record trend analysis, record improvement was big in T47 and T53 classes, and the remaining classes showed minimal improvement in records. In the T11 and T12 classes in 200 m records in the podium group were improved in each Paralympic Games, but T36 did now show a significant change. In the 400 m records showed improvement, but T54 showed deterioration in records. In T53, records gradually improved until 2016 but worsened again in the Tokyo 2020. In the 800 m, the T53 podium group's change was the biggest. In conclusion, as Paralympic Games continued the number of disciplines declined in the men's division, but records showed an improving trend. As the number of disciplines decreased athletes went to other disciplines, so competition became fierce and competitiveness was judged to improve. Meanwhile, the number of disciplines in the women's division is rising. This is because the number of disciplines increased depending on classes, and IPC's primary strategy to enhance female athletes' participation rate was reflected. The trend was remarkable after 2012. Conceptualization, M.-C.K. and S.-M.H. ; methodology, M.-C.K. and S.-M.H. ; software, M.-C.K. ; validation, M.-C.K. ; formal analysis, S.-M.H. ; investigation, M.-C.K., S.-M.H. ; resources, S.-M.H. ; data curation, M.-C.K. and S.-M.H. ; writing--original draft preparation, M.-C.K. and S.-M.H. ; writing--review and editing, M.-C.K. ; visualization, M.-C.K. and S.-M.H. All authors have read and agreed to the published version of the manuscript.