The maximum rotation away from the initial value that this muscle can apply.
The center property specifies the rotation of the bone when the muscle is at "rest". The max value specfies the maximum rotation in degrees away from the rest value that the muscle can apply. The min value specifies a similar limit but in the negative direction of rotation.
The allowed range for the maximum is 0..180 degrees.
Additional resources: HumanLimit.useDefaultValues.