A year ago I got pain in my ribcage--worried, my heart, lungs, what? Told the physical therapist I been working with for 8 months. She laughed. "It's the obliques!" She had just introduced me to a new exercise, around-the-world using a 5 lb kettle bell. Who knew I had so many muscles in my rib cage area? I've learned a lot about muscles.
At first I got back bra extenders, but other changes happened. Since age 70 I've lost 2 1/2 inches in height, mostly between rib cage and hip bone, I've lost more than 10 pounds and built a lot of muscle. I now do exercises at home, including around-the-world with a 10 pound kettle bell. I'm stronger and feel better and my balance is so much better.
I didn't want to do a bra fitting in a store, so I've experimented. I went from a 32F or G to a 34DD. I buy a couple of bras at a time on sale. My most recent bras are Le Mystere--the ones Oprah used to recommend. Guess what? The 34DD (or E) are uncomfortably tight in the rib cage. I'm having a difficult time with cup size too. D too small, DD too big. I used to be a 32G. Chantelle is good, but only in one style so far. And it hasn't been on sale. Other styles don't give me enough support.
And you know what? I'm about to buy a 12 lb kettlebell! I love having muscles despite the skin over them being all wrinkly.