There is another thread like this one that's very recent.
That muscle is not a major muscle unless you are on a rowing team. I know several women who have had some issue swimming. Arms straight out from your sides rotating in circles is the muscle was used.
From a trusted reconstruction site, women interested in extreme competitive sports such as mountain climbing, skiing, and swimming would not be good candidates for this surgery.
I would say if you haven't noticed much limitation in the last 4 years there probably won't be much now.
Thanks for you input. I haven't done much exercising in the 4 years since my surgery (lazy). In the last 2 months I have joined a gym and started doing pilates as well as other exercises. Some of the positions that are used in pilates I can't do. I didn't know it it was because I was out of shape or residual effects from the displacement of my muscles. The exercises I have problems with are upper body, especially when my arms are involved.
I guess it could be when I get in better shape maybe I will see a difference. Oh, and I am not overweight (just out of shape) so that is not the problem.