The site FAQ says, "The commercial emphasis in recent years of Olympic Level competition has led to the belief that gymnastics is only for the young rather than of benefit for all." Another belief that I've heard (and I know little about gymnastics yet) is that gymnastic training breaks the body down, that all gymnasts have back and other problems, and basically wear themselves out rapidly.
I'm looking forward to adding gymnastic training to my current fitness program. I want to beat gravity. Learn how to fly. At 46, though, my concern is to have a program that I can do forever, that makes me stronger and robust.
Perhaps this is covered in the book (which I'm anxiously awaiting), but it would be helpful to have this myth (if it is a myth) taken apart at the seams, clear away the doubts.
-Ed