A clue that this physical embodiment thing is authentic is that, during my lying-in-bed-in-the-morning practice, I am more frequently experiencing an urge to get up, to move, to get moving. I'll sit up, jump up, or stand up, even before I've let go of the practice. This is a natural impulse and desire, not a mentally imposed one (e.g. "You need to get up because you've got work to do").
I've also felt more naturally inclined to physical activity during the day. I'm doing at least 30 push-ups a day and frequent pull-ups for the fun of it.
This feels like a path to greater inner cooperation: the voluntary participation of matter, rather than its forced subordination.