How can I delete a coordinate of a model?

[Renata Rodrigues]

Hello,

I'm trying to simulate the motion of the shoulder while applying an activation in some muscles. For that I'm using the model of the 'Dynamic Arm Simulator' and Matlab. However I'm having a problem: the time of simulation is taking to long because the model has a lot of muscles and coordinates. I oppened the .osim model in matlab and I was able to delete the muscles, but I'm having a problem trying to delete the coordinates.

I was wondering if is possible to delete a coordinate of a model that has been already made. If it is, can someone help me how to do so?

If is not possible, Is there a simple model that I can simulate the motion of the shoulder by extimulating it's muscles? All the models that I have found so far are too complex and taking too long to simulate.