What changes do you make based on physical state, ie tension, fatigue, etc.?

[Bob]

They're probably obvious answers....  I've noticed if I'm doing the same things in practicing, eventually it levels out.  It's like a plateau, but you never leave.  Doing the same thing makes some improvement but it also traps you in that state.

ex.  Play scales daily.  Sam way, same tempo.  Eventually they just never improve.  You can still play those scales every day which is a plus.  If you push it, you'll be to do just that and not much more for that during the day.  If you're pushing it, tension probably builds up.  If you're doing the scale routine every day and keep capturing a little more tension, eventually you're just stuck like that.  So what do you do to get out of that?  You'd need to lessen tension in the forearms, increase precision in the fingers.  Rest works.  Stretching works.  Slow movements.  Reseting good form. 

Physical states would be in general/global (being overall tired) and specific (worn, tense forearms).

Plus time....

It's usually not lack of practicing so much for me.  It's too much of something....

Tension.
Fatigue.

And then there would be setting good form, developing muscle control for techniques not used in a while. 


So how do you adjust your practicing based on how you feel in general and specifically how your playing muscles feel?