Understood I may be late
However here is some warmup I did as I believe in of the warmups are executed correctly it will follow into the rest of the regimen. Think about this philosophy like your Kobe Bryant’s, Tom Brady etc.
I did combination of what and Ron do as they both mentioned in their books before I am now starting practice values because I need to
With Chris book he talks about these Dexterity exercises as shading a certain direction in boxes
These purposes are for when rendering a shape or form following its direction to make it work
These are thing I starting to realize
Also with automatic drawing with a sumi brush is used to apply these principles while working hand dexterity