Thanks Tom! That is immensely helpful. So - to make sure I'm understanding correctly - given an upper body model (for example), would the idea be to replace muscles with path actuators and let the external model control their tension? Another question comes to mind - would this method prohibit the u...

Hi All! I was curious if anyone has had experience applying an external (aka not native to opensim) muscle model for opensim simulations - or if such a task is possible. I'm trying to implement a muscle model that differs from the millard model in terms of model kinematics and kinetics. As of yet I'...