My right shoulder is just plumb worn out. Originally from other stuff, but casting doesn't help.
I have to remember to really cast WELL and let the rod work itself. Else I have trouble, oh say, reaching for a coffee cup 2 feet from the edge of the table :O
I have more toruble with the left hand. Doing figure 8 retieves in cold water is tough on the articulations (then again, tree planting didn't help)
Take care when yuo play, ... listen to minor pain.