When I do the single arm bent cat, it feels like I am banging my arm against my shoulder. It creates an unpleasant sensation and I'm worried will irritate the shoulder.
I am focused on PPT, but maybe there is another cue I'm missing (or maybe I'm doing it right and the feeling is correct - I know my shoulder mobility is not yet amazing). I don't totally understand "pull the ribs in", but I think I'm doing that too.