Hi
Today there was a successful experiment so I thought I'd share
My dad is in advanced stage of PSP and bed bound
Today he was in great distress and kept drawing his legs and convulsing waist down - I guessed it would be cramps in the legs (he used to have this before as well it seems)
So I helped him stand up and with the help of an assistant, helped him walk about 10 steps from his bed and 10 steps back - I held him under the arms and tilted him first to the left and then right - the assistant would move the foot forward which had less pressure
After 20 such steps (I also took the opportunity to rub his back), I helped him lie down and he was completely calm
So, this is something that can be tried by someone else as well - I hope it works again, if the need arises - I will update if it works