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people practice 8 brocade for health since Song dynasty.

Shaolin monks also practice the set.

if you are in a hurry, then just pick one.

repeat 8 times and do it slowly and remember to...

http://www.youtube.com/watch?v=bSZq78t4WMg&search=qi%20gong

http://www.youtube.com/watch?v=54pdoYpqCuY&search=qi%20gong

http://www.youtube.com/watch?v=WkgurUrGzzk&search=qi%20gong
...

may be there is some kind of supporting prop behind his lower back?

:D

http://www.youtube.com/watch?v=DZ0jui4-eW0

:)

http://www.youtube.com/watch?v=KJeyZ43i-xY&search=eight%20brocade

have fun.

:D