As you probably know, Tina has had two major abdominal surgeries since her 2008-09 Tour. In one of them, a section of her Colon was removed; in the other, her dysfunctional Kidneys were removed, and she received a kidney transplant from her husband, Erwin Bach.
I am assuming that because of those major operations, her movements are now restricted and the kind of dancing she used to do is now impossible for her.
However, I do not think that has to be the case. I would recommend that she consult the Hernia Institute of Florida in Miami. They have developed a mesh technique that is much stronger than any other kind and leaves clients ready to get back to their usual activities in only a few days. Their techniques and tools may be just what Tina needs to regain full mobility again.