Reserve actuators for SO optimal force

[Rohan Kothurkar]

I am performing SO followed by joint contact force for squat activity using Grand design challenge data. If i keep optimal force value 1 for reserve actuators, i am getting over predicted load compared to in Vivo contact force. but if i use optimal force value 100 then the joint contact load as per vivo. What is significance of optimal force in reserve actuators ? What should be value for squatting?

Thanks

[Carmichael Ong]

Reserve actuators provide extra joint torques to the simulation. This might help if muscles are too weak to generate a motion, but as these actuators generate more torque, it means your simulation is driven by these actuators rather than the muscles. Thus, you should check that these actuator torques are low in your final simulation.

I'd suggest looking at the documentation pages about best practices: https://simtk-confluence.stanford.edu/d ... +Practices

[Rohan Kothurkar]

Thanks a lot,
I really appreciate.
I am validating 2 leg squat knee joint contact forces using Rajagopal model/catelli model by Static optimization. I am using same data of design challenge but no model can predict joint contact force. Predicted loads are much higher than in vivo measurements. is there any other method to predict joint contact load?.