Hi.
I am a cynic simply because we spend a few minutes doing their passive movements and then they spend hours lying there in rought the same position.
I am not saying that it is not beneficial, just a little silly if we only see them once or twice a day.
If we are going to do them, then perhaps an hourly routine may be better but who has got the time to do that. Either that or sweet talking the nurse to do it - unlikely.
Of course, I have aboslutely no evidence either way to either back up my assertions or deny yours!