Be sure to get up every couple of hours to do some stretching for about ten minutes to keep the blood circulating properly in your body and to try to prevent blood clots!! No joke on this. The body doesn't do well when it's immobile for long period of time!
I am not contradicting your statement at all as I have heard this before and it makes total sense. But why is it more people don't die while sleeping if immobility precipitates blood clots?