I have noticed, increasingly over the last couple of months, a sensation/feeling of my muscles being "pumped up" like after I have been lifting weights(but,I have not been pumping iron), after finishing the form set I practice, or even part of it, if I am working on difficult sections over and over again.
And there is also a sensation of a kind of moving electical charge under my skin and around my skin, especially, in my arms, hands, shoulders, around my shoulder blades, in my thighs. and somewhat less in my pelvis.
Any member have experiences like this, and understand what is going on.