Hi,
I incorporate stretching and/or joint opening work, the same as bouncing. To open up, relax, get energy moving, build up some warmth... A somewhat neutral pre exercise to either an active or inactive session.
In Chinese systems, a physical position, a hand movement, a technique, etc., all can involve concept too. Remember too, what meditation , or inactive exercise is, and bring that into your development of sitting positions. Developing them only as physical positions ,to accomplish them physically, is certainly good, but is only the 'outside' part. To me, 'lotus' sitting involves a concept, and state of being, which has an ongoing practice connected to it. Not something that can be mastered, and moved past in so short a period of time. I'm sure that you understand that too.
It is also important too, for everyone to realize they can pursue a meditation practice, even if they can't get into these positions, and benefit greatly from it. The level of accomplishment in inactive exercise, is not simply measured by the success in accomplishing a physical position...
love,
gallen
