Femoral Neck Strain during Maximal Contraction of Isolated Hip-Spanning Muscle Groups

Figure 2

The calculated hip force vector generated by peak isometric contraction of the hip-spanning muscles. The femoral coordinate system is displayed in the posterior and medial views. The hip contact force measured by Bergmann et al. (2001) on three patients (i.e., SNK, KWR, and PFL) during a variety of daily activity is displayed as black dots. Reference zero and positive angle rotations in the frontal (), sagittal (), and transversal () planes are also displayed.