Table 6. Quantities and results for calculating tension Fm in the M. fibularis longus and M. gastrocnemius, by directional cosines [50] for components in the ground reference frame/coordinate system (ground c.s.), and rotation matrices [51] in the metatarsus’s reference frame/coordinate system in Strand7 (Strand7 MT c.s.).
| Angles in ground c.s. | αxFm | 90—αxFm | βyFm | |
|---|---|---|---|---|
| (deg) | 61.392 | 28.608 | 73.124 | |
| Rotations about: | ||||
| y-axis: | ||||
| αxFmxL1—αxFm (deg) | 9.43 | |||
| Rotation matrix: | 0.9864865 | 0 | 0.1638425 | |
| 0 | 1 | 0 | ||
| -0.1638425 | 0 | 0.9864865 | ||
| x-axis: | ||||
| β yL1—β yFm (deg) | -5.92 | |||
| Rotation matrix: | 1 | 0 | 0 | |
| 0 | 0.9946669 | -0.103139 | ||
| 0 | 0.1031398 | 0.9946669 | ||
| Fm (N) | z | x | y | Resultant |
| Ground c.s. | 4201.655 | 2473.824 | 968.141 | 4971.017 |
| Strand7 MT c.s. | 3815.958 | 3141.492 | 529.623 | 4971.017 |