I want to look at muscle excitations of the lumbar spine while standing or being slightly bent over. Could I edit this model to accomplish this or is there another model that I should use?

I am trying to do the same thing and I am struggling with how to do this as well. I have found little documentation on how to attach a finite element object to a preexisting opensim model.

You need to use a program like archiver to extract the folder.

Hello
I am trying to open this model into opensim to look at how loads affect the neck but I cannot figure out how to properly load the model into opensim 4.0. I am new to opensim and am trying to use it as part of my masters research.
this is the message I am getting.