J.L.
My sister in law and father in law bought us a glider with matching gliding foot stool. It was fabulous, but I noticed my back was getting sore if I sat too long while nursing or rocking both of my kids. Get a lumbar support pillow. I used the kind that is for necks, actually, and it made a huge difference. Keeping your feel elevated will help alleviate pressure in your lower back, and it will help with better blood flow in your legs and feet. (I am the Safety Coordinator where I work and Ergonomics is one of my favorite topics!) We got our glider from Babies R Us. I believe Walmart and Target both carry gliders.