SBS, work out if it makes you feel good. If it becomes a downer and a chore, then it's not working for you. I would only encourage you to remain active, whether it's hiking or just romping with your kids alot. Have you tried Pilates? It really has helped me feel good and strong in my middle.

Have you checked TE for plus-size clothing? I've heard they have a good selection, and it's right here!