## 3 Results  
In the discussed temporo-spatial parameters, stride length depended on the gait speed and the prosthetic product used; higher values were recorded at a fast gait while lower ones during the gait with stubby prostheses (Table 1). Step width was the most similar to the gait of non-disabled persons. The stride width when walking with stubby prostheses was most similar to the gait of healthy subjects (0.17 \(\pm\) 0.01 m for healthy people, 29% higher for stubbies, 35% for prosthetic gait with self-selected gait speed and 41% for fast gait speed). The difference in step length between the fast gait and the self-selected gait speed did not exceed 5% compared to the results of healthy people. The gait with stubbies required the highest cadence (gait slower than in healthy people by 81%, cadence higher than in healthy people by 14%) to maintain the gait speed. The division of the gait cycle into phases presented mostly correct proportions, i.e., 60% (stance phase) to 40% (swing phase). The biggest differences in the range of movement (ROM) occurred in the sagittal plane (Table 2). The faster the patient moved, the higher the anterior tilt of the shoulder girdle and pelvis. The difference in the shoulder girdle tilt in ROM between a fast gait and a prosthetic gait with stubbies was 57%. Similarly, the pelvic tilt (physiological gait, ROM 1-2\({}^{\circ}\)) during the gait was constantly in antieflexion. When it comes to the gait with stubbies, the difference was the lowest--49% (self-selected gait speed: 59%, fast gait: 56%). Hip flexion/extension in ROM during the gait with stubbies forced higher flexion and extension values due to the lack of knee joints (20%--gait with stubbies, 8%--self-selected gait speed, 4%--fast gait gait). Due to the need to provide the required gap from the ground, higher values of hip flexion/extension in ROM during the gait with stubbies occurred in the frontal plane. Pelvic obliquity during the gait with stubbies required higher raise to ensure swing (48%--gait with stubbies, 41%--self-selected gait speed, 13%--fast gait). Figure 1: The main actions at shoulder, pelvis, hip and knee in sagittal (blue), frontal (green) and transversal (red) planes with arrows to explain the directions of motion (**A**). The stubby prosthesis used in the study is presented from back (**B**) and front (**C**). \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{4}{c}{**Engle [\({}^{\circ}\)]**} \\ \hline  & \multicolumn{2}{c}{**Fast**} & \multicolumn{2}{c}{**Self-Selected**} & \multicolumn{2}{c}{**Stubby Prostheses**} \\ \hline  & **R** & **L** & **R** & **L** & **R** & **L** \\ \hline \multicolumn{2}{c}{_Shoulder girdle tilt_} \\ \hline ROM\({}_{\text{max}}\) & 52.6 & 51.4 & 51.3 & 51.4 & 42.2 & 51.4 \\ ROM\({}_{\text{min}}\) & 38.2 & 39 & 44.5 & 46.1 & 33 & 30.6 \\ ROM\({}_{\text{range}}\) & 14.4 & 12.4 & 6.8 & 5.8 & 9.2 & 11.3 \\ \hline \multicolumn{2}{c}{_Shoulder girdle obliquity_} \\ \hline ROM\({}_{\text{max}}\) & 4.2 & 2.5 & 2.6 & 0.2 & 4.4 & \(-\)0.8 \\ ROM\({}_{\text{min}}\) & \(-\)1.9 & \(-\)5.2 & \(-\)0.3 & \(-\)3.1 & 1.3 & \(-\)4.3 \\ ROM\({}_{\text{range}}\) & 6.1 & 7.7 & 2.9 & 3.3 & 3.1 & 3.5 \\ \hline \multicolumn{2}{c}{_Shoulder girdle rotation_} \\ \hline ROM\({}_{\text{max}}\) & 3.3 & 15.2 & \(-\)0.6 & 18 & 5.4 & 11.4 \\ ROM\({}_{\text{min}}\) & \(-\)15.8 & \(-\)2.6 & \(-\)18.6 & 1 & \(-\)13.5 & \(-\)5 \\ ROM\({}_{\text{range}}\) & 19.1 & 17.8 & 18 & 17 & 18.9 & 16.4 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Parameters characterizing the range of motion for prosthetic gait (fast gait, self-selected gait, speed and gait with stubby prostheses—stubbies).