Originally Posted by fuzz nation
If you've got a repaired or mending shoulder, I think you could take some stress off it by getting your racquet up behind your head sooner. When the first move is to drop it below your waist as you wind into your motion, that racquet still has a loooooong way to go to get up to its set position before even being ready to release up to contact.
This is also what I was going to say. Getting the arm up earlier should take some stress off the shoulder.