by JoseFreitas on Sun Oct 05, 2008 11:33 am
I'm sure many others will give their answers too.
San Ti Shi is just standing in a specific posture. Obviously, there are instructions on "what to do" while you're "just" standing, from breathing to concentration and so on. The posture is the traditional on-guard posture, same-hand same-foot forward, the rear hand in front of the belly button, about 60 to 70% of your body weight on the rear leg. Lots of variations are taught from teacher to teacher, and many schools teach added supplemental postures. Standing will train your body and "unify" it. In my experience, coming from Karate initially, even though I had Taiji experience, the fact that Taiji was done slowly "patched up" a lot of my inability at concentration and "feeling inside the body". Xingyi required horrid amounts of attention to minute details of stuff happening inside your body, and San Ti Shi was the way for me to train inner awareness so that eventually when my teacher said things like "now, as you jump step forward you need to connect the bouncing up of the front foot landing with the twist of your forearm as your back slightly arches... etc" I could start noticing these things.
Standing is somewhat boring, but once you can plow through the boredom and through the pain in the legs and body (which should take 2-3 months of more or less daily training for 10-20 minutes at least) it gets a little more interesting as you can send your awareness through the body and observe stuff as you make slight shifts in your weightedness, breathing and so on. It is said to be important for acquiring explosive force.
As for the other expressions you mentioned, they relate to the qualities of the body you must strive to cultivate and when doing Xingyi. Legs like Chicken means the capacity to move fast in any direction while retaining to ability to stop suddenly, reverse directions or suddenly stand on one leg only easily. Like chicken, just look at them running around and you'll see they're really good at moving around. Dragon body means your body is completely connected, movement at one end being transmitted to the other end easily, you can twist and coil snake-like and have tremendous flexibility and force in your back to connect the whole body. Etc...