Currently, I'm working on a subject-specific FDK-knee model that performs a squat. The model is supposed to be as slim as possible so I'd like to keep head, trunk and left leg only (only left knee will be used for FDK) and remove all the other limbs. The goal is to analyse the kinematics and stresses in the left knee, so the other limbs are not necessary for my work. While removing the limbs worked so far, some muscles overload during the FDK-simulation. When reducing the body mass to about half the original (subject) weight, the error did not occur again. For that reason I have the following questions:
Is it even possible to simulate a squat with only one leg and no arms that shows no difference to a model which does include both legs and arms (i.d. all limbs), so that the stresses in the left knee could be analysed? Or will the remaining leg carry the whole weight of the body similar to a one-legged squat? If it is possible, could you please elaborate how to implement that?
Does exluding the arms lead to lower weight and therefore lower stress in the joints during squatting (even when using both legs)?
The model uses the TLEM 2.1 model. The same drivers as in THA-KneeBendDemo in the AMMR repository were used. Removing the right leg lead to two missing constraints so I added two drivers constraining the rotation of the pelvis in x and y direction.
Thanks a lot!