Healthy Old Guru Gerald Kyle

People with placid jobs should do the Elephant Swing 

What is the Elephant Swing? 

Many years ago I read a book about how elephants constantly swing their trunks from side to side when they are confined to a zoo. Much like the prisoner who paces in his cage (cell); without movement to lubricate the joints they would eventually lock into place, as the muscles become flaccid. Our joints depend on movement to lubricate themselves.