@Frankie You're right--any of those can happen with exercise. But you also get injuries just from sitting and working, e.g., back strain or carpal tunnel. I'm a believer in doing whatever works for you, so if you strive to be "'healthy" in a different way, bravo!
I just wanted people to know about CG at Cranebrook Park so I can continue going there (again, selfish, but hey, it's so convenient for me).