I did a books.google.com search and there were no primary references, just a few lines in books about "amazing facts" and a reference to an episode of "Maury."
Several days after returning home I got stuck in the bathtub: I couldn't lift myself out, my wife couldn't lift me. After several false starts, we got me out by me lifting up a couple inches, and my wife shoving a pillow under my butt, several times. :-)
I was back at (office) work 2.5 months later, and biking to work 3 months after that.
All of which to say: 100% agreed -- do absolutely nothing and the body just wastes away.