## 4 Discussion  
This study conducted a bibliometrics analysis of the trend of Paralympic studies by identifying core keywords and analyzing the relationships among them. A bibliographic list of 1613 studies was compiled, covering publications from 2003 to 2022, using KNA. After refining unsuitable studies, 1404 studies and 6414 keywords were used for analysis. The results showed that the number of published Paralympic studies steadily increased as the Summer and Winter Paralympic continued, with a significant increase observed between 2011 and 2015. This increase was likely influenced by the expansion of social science research following the 2015 VISTA Conference, as well as increased research on performance related to the International Paralympic Committee (IPC) and the London 2012 Paralympic Games. The top five keywords used in the entire Paralympic studies were athlete, performance, Olympic Games, disability, and parasport. An analysis of core keywords with high DC in main areas of Paralympic studies, athlete, performance, and classification, showed high DC and constituted main study areas. Classification, physical impairment, and disability were connected with core keywords and constituted detailed study areas. Over the ten-year period since the evidence-based classification was published, the IPC, para-sports coaches, and researchers have published research on the effective implementation and related issues of a new classification system that plays a crucial role in para-sports [17; 18; 19; 20]. To grasp Paralympic study trends according to the application of the new classification (evidence-based classification), this study divided the study period into Section 1 (2003-2016) and Section 2 (2017-2022), produced core keywords with high DC, and analyzed keyword network in a time series manner. The Paralympic studies carried out in Section 1 (2003-2016) showed that physical impairment showed high DC, centered on the top two keywords, athlete and performance, and constituted the main study areas. Olympic Games, performance, and wheelchair showed a connection with highly related keywords and formed the detailed study areas. As for the structure of the Paralympic studies performed in Section 2 (2017-2022), the top two keywords, athlete and performance, revealed high DC and formed main study areas. Parasport, disability, and classification showed correlation with highly related keywords and formed detailed study areas. When comparing core keywords affecting keyword network the most, athlete and physical impairment were drawn in Section 1, and athlete and performance were drawn in Section 2. Regarding top-ranked keywords constituting detailed study areas, Olympic Games and performance \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multicolumn{2}{c}{**Section 1 (2003–2016)**} & \multicolumn{3}{c}{**Section 2 (2017–2022)**} \\ \hline
**Rank** & **Keywords** & **Degree Centrality** & **Rank** & **Keywords** & **Degree Centrality** \\ \hline
1 & athlete & 0.690 & 1 & athlete & 0.724 \\
2 & physical impairment & 0.552 & 2 & performance & 0.586 \\
3 & olymp games & 0.414 & 3 & parasport & 0.379 \\
4 & performance & 0.393 & 4 & disability & 0.379 \\
5 & wheelchair & 0.379 & 5 & classification & 0.345 \\
6 & sci & 0.345 & 6 & injury & 0.310 \\
7 & exercise & 0.345 & 7 & training & 0.276 \\
8 & injury & 0.310 & 8 & sci & 0.241 \\
9 & classification & 0.310 & 9 & health & 0.241 \\
10 & athletics & 0.241 & 10 & olympic games & 0.207 \\
11 & biomechanics & 0.207 & 11 & analysis & 0.207 \\
12 & amputation & 0.172 & 12 & strength & 0.207 \\
13 & tetrapelegia & 0.172 & 13 & swimming & 0.207 \\
14 & training & 0.172 & 14 & exercise & 0.172 \\
15 & physical activity & 0.172 & 15 & physical impairment & 0.172 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: DC of Top 15 keywords of Paralympic studies in Section 1 (2003–2016) and Section 2 (2017–2022). were produced in Section 1, and parasport, disability, and classification were produced in Section 2.