Mecanim Muscle in C#

Hello,
Sorry for my english, I’m french.
I would like to contract a muscle (or move a single joint) by script in C # as you can do in Mecanim / Rig / Configure / Muscles and “Per-Muscle Settings”
Thank you in advance for your ideas
Regards,
Stephan

Have a look at this: Unity - Scripting API: HumanTrait.GetMuscleDefaultMax