## 3 Results
### Initial Saddle Pressure Measurement and Bike Fitting  
At the outset of the bike fitting process, the components of the test bike frame were initially aligned in a general manner according to the respective body size of the test subjects. As described in Section 2, all initial pressure measurements were performed on the unadorned CFRP saddle shell. Subsequently, the position of the hands was altered from position 1 over position 2 to position 3, and the pressure exerted on the saddle was evaluated following each transition. The aforementioned positions are elucidated in greater detail with the aid of Figure 4.  
Figure 4: Riding positions and corresponding pressure measurements—blue, low pressure to red, high pressure. (**a**) Upright position 1 with the greatest pressure peaks—saddle pressure is concentrated on the rear; (**b**) standard riding position 2 with slightly bent posture, where the upper body comes further forward, thus distributing the pressure further towards the tip of the saddle; most frequently used position; (**c**) athletic position 3 with bent posture; upper body comes even further forward, thus further spreading the saddle pressure towards the saddle tip; position with the lowest pressure peaks on the saddle [39]. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Test Subject** & **A** & **B** & **C** \\ \hline Body size [cm] & 184 & 180 & 185 \\ Body weight [kg] & 81 & 82 & 80 \\ Max. Pressure [mbar] & 877 & 663 & 880 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Test subject body dimensions in relation to measured peak pressures. Once the measurement values of saddle pressure for all three hand positions had been determined, modifications were made to the settings of the test bike frame. In accordance with the test subject, modifications were made to the saddle height or the position of the cleat connection on the bicycle shoe. Subsequently, the measurement was repeated for all three handlebar positions, and the pressure on the saddle was subjected to further analysis. This process was repeated until the pressure distribution on the saddle exhibited a discernible improvement, as determined by the bike fitting expert. This was evidenced by a reduction in pressure peaks or, optimally, an even distribution of pressure (symmetry between the right and left halves of the saddle or relief of the saddle tip). Once all measurements had been collected, the data pertaining to riding position 2 for each test subject were subjected to visualization through the use of a histogram, which demonstrated the distribution of pressure value ranges (Figure 5). The X-axis represents the various pressure ranges in mbar, while the Y-axis depicts the frequency of occurrence of these pressure values. At the outset, within the initial pressure range of 1 to 75 mbar, test subject A exhibited the highest number of measurements. While the pressure range from 76 to 501 mbar is approximately equally distributed, Figure 5a (right) shows that the range from 501 to 901 mbar is underrepresented. The pressure peak values are illustrated in Figure 5a (left). The data set as a whole indicates an unequal distribution of pressure between the two saddle halves, with the left side exhibiting higher pressure values. These peak pressure values were observed on the respective outer edges on the back of the saddle halves, as well as on the front left edge. Test subject B exhibited the highest number of measurements in the range of 1 to 51 mbar compared to the other test subjects. With the exception of the range from 151 to 200 mbar, the pressure range from 101 to 400 mbar was approximately equally distributed, as illustrated in Figure 5b (right). As with test subject A, the data set indicates an unequal distribution of pressure between the two saddle halves, with the left side exhibiting a higher peak pressure value with 663 mbar. Additionally, a slight peak with 317 mbar is present in the saddle nose. In the range from 676 to 900 mbar, there are no pressure values present in the data set.