## 3 Results
### Kinematic Differences between Hurdles
\begin{table}
\begin{tabular}{c c c c c c c} \hline  & & **Hurdle 1** & **Hurdle 2** & **Hurdle 3** & **Hurdle 4** & **Hurdle 5** \\ \hline Step Time & Preparatory step & 0.20 \(\pm\) 0.00 & 0.20 \(\pm\) 0.00 & 0.20 \(\pm\) 0.00 & 0.20 \(\pm\) 0.00 & 0.20 \(\pm\) 0.00 \\ \hline  & Hurdle Step & 0.51 \(\pm\) 0.01 & 0.50 \(\pm\) 0.01 & 0.50 \(\pm\) 0.01 & 0.49 \(\pm\) 0.01  & 0.50 \(\pm\) 0.01 \\ \hline  & Landing Step & 0.16 \(\pm\) 0.00 & 0.15 \(\pm\) 0.00 & 0.15 \(\pm\) 0.00 & 0.16 \(\pm\) 0.00  & 0.16 \(\pm\) 0.00  \\ \hline  & Recovery Step & 0.25 \(\pm\) 0.00 & 0.25 \(\pm\) 0.00 & 0.24 \(\pm\) 0.00 & 0.24 \(\pm\) 0.00 & 0.25 \(\pm\) 0.00 \\ \hline Contact Time & Preparatory step & 0.11 \(\pm\) 0.00 & 0.11 \(\pm\) 0.00 & 0.11 \(\pm\) 0.00 & 0.11 \(\pm\) 0.00 & 0.11 \(\pm\) 0.00 \\ \hline  & Hurdle Step & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 \\ \hline  & Landing Step & 0.09 \(\pm\) 0.00  & 0.08 \(\pm\) 0.00 & 0.08 \(\pm\) 0.00 & 0.09 \(\pm\) 0.00 & 0.09 \(\pm\) 0.00 \\ \hline  & Recovery Step & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 \\ \hline Flight Time & Preparatory step & 0.09 \(\pm\) 0.00 & 0.09 \(\pm\) 0.00 & 0.09 \(\pm\) 0.00 & 0.09 \(\pm\) 0.00 & 0.09 \(\pm\) 0.00 \\ \hline  & Hurdle Step & 0.39 \(\pm\) 0.01  & 0.38 \(\pm\) 0.00 & 0.38 \(\pm\) 0.01 & 0.37 \(\pm\) 0.01 & 0.38 \(\pm\) 0.01  \\ \hline  & Landing Step & 0.07 \(\pm\) 0.00 & 0.07 \(\pm\) 0.00 & 0.07 \(\pm\) 0.00 & 0.08 \(\pm\) 0.00 & 0.07 \(\pm\) 0.00 \\ \hline  & Recovery Step & 0.12 \(\pm\) 0.00 & 0.13 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 & 0.12 \(\pm\) 0.00 \\ \hline Step Length & Preparatory step & 1.82 \(\pm\) 0.01  & 1.88 \(\pm\) 0.02 & 1.91 \(\pm\) 0.02 & 1.87 \(\pm\) 0.02 & 1.86 \(\pm\) 0.01  \\ \hline  & Hurdle Step & 3.76 \(\pm\) 0.03 & 3.73 \(\pm\) 0.02 & 3.89 \(\pm\) 0.03  & 3.71 \(\pm\) 0.02 & 3.72 \(\pm\) 0.02 \\ \hline  & Take-off distance & 2.01 \(\pm\) 0.02  & 2.11 \(\pm\) 0.02 & 2.14 \(\pm\) 0.02 & 2.08 \(\pm\) 0.02  & 2.12 \(\pm\) 0.02 \\ \hline  & Landing distance & 1.74 \(\pm\) 0.03  & 1.62 \(\pm\) 0.03 & 1.75 \(\pm\) 0.03  & 1.63 \(\pm\) 0.03 & 1.60 \(\pm\) 0.02 \\ \hline  & Landing Step & 1.42 \(\pm\) 0.02  & 1.46 \(\pm\) 0.02 & 1.45 \(\pm\) 0.02  & 1.50 \(\pm\) 0.02 & 1.48 \(\pm\) 0.02 \\ \hline  & Recovery Step & 1.98 \(\pm\) 0.01  & 2.01 \(\pm\) 0.02 & 1.98 \(\pm\) 0.01  & 2.03 \(\pm\) 0.01 & 2.02 \(\pm\) 0.02 \\ \hline Step Width & Preparatory step & 0.13 \(\pm\) 0.01 & 0.14 \(\pm\) 0.01 & 0.15 \(\pm\) 0.01  & 0.12 \(\pm\) 0.01 & 0.13 \(\pm\) 0.01 \\ \hline  & Hurdle Step & 0.16 \(\pm\) 0.01  & 0.09 \(\pm\) 0.01 & 0.10 \(\pm\) 0.01 & 0.08 \(\pm\) 0.01 & 0.08 \(\pm\) 0.01  \\ \hline  & Landing Step & 0.13 \(\pm\) 0.01 & 0.12 \(\pm\) 0.01 & 0.12 \(\pm\) 0.01 & 0.12 \(\pm\) 0.01 & 0.16 \(\pm\) 0.01  \\ \hline  & Recovery Step & 0.21 \(\pm\) 0.01 & 0.24 \(\pm\) 0.01 & 0.23 \(\pm\) 0.01 & 0.24 \(\pm\) 0.01 & 0.29 \(\pm\) 0.01  \\ \hline \multicolumn{6}{l}{Inter-hurdle difference: * \(p\) \(<\) 0.05; \({}^{\ddagger}\)\(p\) \(<\) 0.01; \({}^{\ddagger}\)\(p\) \(<\) 0.001. Superscripts numbers indicate the hurdle-unit (1–5) where differences exist.} \\ \end{tabular}
\end{table} 
Table 2: Evolution of the spatial-temporal variables of men hurdlers participating in the 44 th Benish Indoor and 12 th IAAF World Indoor Championships. \begin{table}
\begin{tabular}{c c c c c c} \hline  & & **Hurdle 1** & **Hurdle 2** & **Hurdle 3** & **Hurdle 4** & **Hurdle 5** \\ \hline Step Time & Preparatory step & 0.20 \(\pm\) 0.00  & 0.21 \(\pm\) 0.00 & 0.21 \(\pm\) 0.00 & 0.21 \(\pm\) 0.00 & 0.21 \(\pm\) 0.00 \\ \hline  & Hurdle Step & 0.46 \(\pm\) 0.01 & 0.46 \(\pm\) 0.01 & 0.45 \(\pm\) 0.01  & 0.45 \(\pm\) 0.01 & 0.45 \(\pm\) 0.01 \\ \The differences in the spatial parameters with respect to the mean race values showing moderate, large, or very large effect sizes on step length in every step, except for the landing step, both for men and women.