Does any have any suggestions on firming the abdominal muscles? Is there any exercise routines that would help?

Abs? What are those?

There are tons of core and ab exercises out there. There's the good ol crunches, 6 inches, planks, etc. I don't really do that much isolation work on abs, but I get plenty of work on them doing compound lifts like deadlifts, squats and plyometrics. I'm a year plus post op and I have only recently started rediscovering my abs. They are very faint and I can only slightly see them when I flex them, but it's the first time I've noticed them since college. If you don't do any deadlifts or squats, you may want to try some of the exercise balls, bridges, abdominal presses, etc. When you first do them, you may want to ease into it and gradually build up. Really sore abs from diving right in can make it hard to function in regards to normal day to day tasks.