IK not using Muscle constraints

Hi,

I’m using IKCtrl to control hand position. This works.
I’ve gone back into a model and setup some muscle constraints to make look better.
I apply changes to model.
I don’t see the muscle constraints being applied when I use IK when moving arm.
Am I missing something?
A reimport / refresh step? The avatar is the same and correctly linked into my model instance in scene.
Or does IK only apply on animations? Does OnAnimatorIK() occurs after the animation / muscle constraints have been applied.

Thanks.

I have the same question. Does anyone know how to use muscle constraints with IK?

I have the same question. Does anyone know how to use muscle constraints with IK???