## 4 Discussion
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Variable** & **Footrest-Seat Edge** & **Footrest-Seat Depression** & **Footrest-Seat End** \\ \hline Height (cm) & r = 0.86; \(p\leq 0.001\) & r = 0.86; \(p<0.001\) & r = 0.85; \(p<0.001\) \\ Body mass (kg) & r = 0.59; \(p\leq 0.001\) & r = 0.61; \(p<0.001\) & r = 0.57; \(p<0.001\) \\ lliospinale H (cm) & r = 0.90; \(p\leq 0.001\) & r = 0.90; \(p<0.001\) & r = 0.91; \(p<0.001\) \\ Trochanteroin-tibale & r = 0.80; \(p\leq 0.001\) & r = 0.82; \(p<0.001\) & r = 0.81; \(p<0.001\) \\ ltarle L (cm) & r = 0.77; \(p\leq 0.001\) & r = 0.75; \(p<0.001\) & r = 0.78; \(p<0.001\) \\ Tibiale laterale H (cm) & r = 0.64; \(p\leq 0.001\) & r = 0.64; \(p<0.001\) & r = 0.65; \(p<0.001\) \\ Side Right Passive (°) & r = -0.11; \(p=0.949\) & r = 0.01; \(p=0.931\) & r = 0.12; \(p=0.508\) \\ Side Left Passive (°) & r = -0.02; \(p=0.890\) & r = -0.01; \(p=0.962\) & r = 0.12; \(p=0.491\) \\ Side Right Active (°) & r = -0.04; \(p=0.819\) & r = 0.01; \(p=0.964\) & r = 0.07; \(p=0.701\) \\ Side Left Active (°) & r = -0.20; \(p=0.253\) & r = -0.16; \(p=0.931\) & r = 0.12; \(p=0.508\) \\ Thoracic curv. Stand (°) & r = 0.34; \(p=0.046\) & r = 0.37; \(p=0.030\) & r = 0.26; \(p=0.141\) \\ Lumbar curv. Stand (°) & r = -0.09; \(p=0.623\) & r = -0.09; \(p=0.591\) & r = -0.10; \(p=0.556\) \\ Pelvic tilt Stand (°) & r = -0.05; \(p=0.785\) & r = -0.06; \(p=0.717\) & r = -0.03; \(p=0.854\) \\ Thoracic curv. BP (°) & r = 0.11; \(p=0.516\) & r = 0.12; \(p=0.507\) & r = 0.02; \(p=0.507\) \\ Lumbar curv. BP (°) & r = -0.18; \(p=0.318\) & r = -0.14; \(p=0.413\) & r = -0.15; \(p=0.410\) \\ Pelvic tilt BP (°) & r = 0.18; \(p=0.296\) & r = 0.14; \(p=0.442\) & r = 0.18; \(p=0.318\) \\ Thoracic curv. AP Right (°) & r = 0.07; \(p=0.694\) & r = 0.07; \(p=0.691\) & r = -0.01; \(p=0.949\) \\ Lumbar curv. AP Right (°) & r = 0.36; \(p=0.036\) & r = 0.39; \(p=0.022\) & r = 0.29; \(p=0.099\) \\ Pelvic tilt AP Right (°) & r = -0.16; \(p=0.377\) & r = -0.15; \(p=0.394\) & r = -0.11; \(p=0.552\) \\ Thoracic curv. AP Left (°) & r = 0.01; \(p=0.951\) & r = 0.03; \(p=0.856\) & r = -0.10; \(p=0.573\) \\ Lumbar curv. AP Left (°) & r = 0.08; \(p=0.661\) & r = 0.11; \(p=0.525\) & r = 0.05; \(p=0.798\) \\ Pelvic tilt AP Left (°) & r = -0.19; \(p=0.269\) & r = -0.18; \(p=0.318\) & r = -0.16; \(p=0.374\) \\ \hline \hline \end{tabular}  
* L: Length; H: Height; SLR: Straight Leg Raise test; Curv: Curvature; Stand: Standing; BP: Base position; AP Right: Attack position from the right; AP Left: Attack position from the left.  
\end{table} 
Table 3: Correlations between the placement of the material and the anthropometric variables. knees positions, which have shown that sagittal spine position and pelvic tilt were influenced by hamstring extensibility in these positions [20; 24]. Thus, it is possible that the amateur group, due to their higher hamstring extensibility, could maintain the pelvis in the anteversion position during maximum attack positions [18], which allows for a normal position of thoracic and lumbar curvatures. However, higher-skill level groups showed changes in normal pelvic tilt and spine curvatures as a consequence of the lower hamstring extensibility. Nevertheless, hamstring extensibility can also be influenced by paddler position on the boat, especially in paddlers with a high volume of training [25]. Further research should be undertaken to investigate the interdependence of these variables with a longitudinal design. Some reports have analyzed the anthropometric profile of kayakers, but only a few of them have included the lengths of the lower limbs [1; 7; 15; 26; 27]. A possible explanation for this may be due to the different aims of the research studies or the lack of a comprehensive view about the influence of the lower limbs on sport performance. A longer thigh could provide a competitive advantage when generating force through the system of levers created during paddling [28].