I think S M is on the money. Take a single posture and repeat.
Try and get your mind really into it. Feel the root, relax every muscle and joint. Finally when you feel almost as if there is barely enough strength to stand up, start to move. Back stance to front or whatever. But move slo-o-owly, feel every muscle and joint.

Finish the movement, hold the new posture and regain "song".

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Daoism speaks of keeping to the center, Buddhism speaks of opening the center... All that the thousands of classics explain is this word ‘Center’