I've just found this extract from T'internet, NDR.
"Known as the Edgar Allen Physical Treatment Centre from 1947, being then a unit of the Royal Sheffield Infirmary and Hospital, it also provided training grounds for students from the School of Physiotherapy which opened in May 1949. By the 1950s, as well as a fully kitted out gymnasium, there were sunlight, diathermy, electrical, heat and massage departments, rooms for mud treatment, whirlpools, paraffin wax baths and a rheumatism centre. It closed, and the buildings were sold off in October 1988."
I'm sure you'll remember some of that kit well!
Actually, when I took the photo in 1985, it looked pretty unoccupied then. It was one of the reasons I took the photo.