I've noticed that when I'm doing a very mentally intensive task, such as focusing all my energy on reading sheet music, converting that to notes, chords, positi

I've noticed that when I'm doing a very mentally intensive task, such as focusing all my energy on reading sheet music, converting that to notes, chords, positions, and finger style picking patterns, I warm up considerably. Since I don't keep up with it regularly, every return is very mentally exhausting and I'll end up sweating with no ambient temperature change. I have no doubt its possible to trick the mind into re-regulating.