Thank you everyone for all the replies. I have been very busy and haven't had a chance to respond, but I did read all of these before I went to see her yesterday.

She asked me if I had any reactions to seeing her last week, and I said that last year she said she might have to retire because of health reasons and I was wondering if she was OK health-wise. She was predictably vague and said she was still dealing with some issues here and there but that it was under control and she wasn't going to retire. I didn't want to mention the weight gain, even though I wish she would have been more specific with what she is dealing with, so I asked her why she was wearing tennis shoes. She said it was because she had surgery on her Achilles tendon.

So I did ask her and it felt very natural, since she kind of bought it up first in a way, but she definitely wasn't specific, not that I expected her to be. I wish she was a little more specific though.