Can anyone recall the movie where a piano player was using an apparatus to strengthen (or stretch) their ring finger. I keep picturing AMADEUS but i can't find references. If not, does any one know of a piano player who was documented as having used such tools.The tool had a string and pulley.
Robert Schumann supposedly injured his hand with a device designed to strengthen the fourth finger.
His hand was injured but the actual injury has now acquired the patina of legend.