SRS, thanks for the link. That's very interesting. I do wish professionals like him would think about folks who are unable to take walks and present different exercises which meet the same needs. I believe that's what I do with the qi gong, but those kinds of videos/statistics leave me wondering, sometimes. But, I go back and listen to my DVDs and read of the good effects of qi gong and tai chi and then I feel good about what I am doing.

Good night, all!