I do not know, but I do know I love my T'ai-chi video I have, and use it many times a week. That was one of my goals for summer vacation, to learn something new-so I learned some T'ai-chi and yoga. Feel alot better by the end of summer!
In all honesty, I feel so much better after 2 months of the T'ai-chi and yoga-or it could be I haven't had to go to school in 2 months! But I did start it at the end of last school year, it is easier to get up in the morning now.
Hey, when he turn his face away, I fake it! He doesn't know! He's not watching!